WO2007072849A1 - 体内画像撮影装置 - Google Patents
体内画像撮影装置 Download PDFInfo
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- WO2007072849A1 WO2007072849A1 PCT/JP2006/325350 JP2006325350W WO2007072849A1 WO 2007072849 A1 WO2007072849 A1 WO 2007072849A1 JP 2006325350 W JP2006325350 W JP 2006325350W WO 2007072849 A1 WO2007072849 A1 WO 2007072849A1
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- Prior art keywords
- capsule
- imaging
- subject
- image capturing
- capturing device
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B19/00—Cameras
- G03B19/02—Still-picture cameras
- G03B19/023—Multi-image cameras
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
- A61B1/00009—Operational features of endoscopes characterised by electronic signal processing of image signals during a use of endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00043—Operational features of endoscopes provided with output arrangements
- A61B1/00055—Operational features of endoscopes provided with output arrangements for alerting the user
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00156—Holding or positioning arrangements using self propulsion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
- A61B1/00181—Optical arrangements characterised by the viewing angles for multiple fixed viewing angles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/045—Control thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
- A61B5/065—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
- A61B5/067—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe using accelerometers or gyroscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/07—Endoradiosondes
- A61B5/073—Intestinal transmitters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B19/00—Cameras
- G03B19/18—Motion-picture cameras
- G03B19/22—Double cameras
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
Definitions
- the present invention relates to an in-vivo image photographing apparatus such as a capsule endoscope that is introduced into a subject and photographs an in-subject image.
- swallowable capsule endoscopes have been developed in the field of endoscopes!
- This capsule endoscope has an imaging function and a wireless function. After being swallowed from the patient's mouth for observation inside the body cavity, until it is naturally discharged from the human body, for example, the esophagus, stomach, small intestine, etc. It has a function of moving inside the organ of the human body according to its peristaltic movement and sequentially imaging (see, for example, Patent Document 1).
- image data captured inside the body by the capsule endoscope is sequentially transmitted outside the body by wireless communication, and stored in a memory provided in a receiving apparatus outside the body.
- a doctor or nurse can make a diagnosis based on the image displayed on the display based on the image data stored in the memory.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-19111
- Patent Document 2 US Patent Application Publication No. 2004Z199061
- a monocular capsule endoscope in which an image sensor such as a CCD is mounted on only one side is generally used, and is only in one direction (one end side direction). Shooting is possible.
- the shooting direction of the capsule endoscope is either forward or backward.
- it is difficult to know if it is going forward For example, if you want to take a picture of the cardia immediately before reaching the stomach from the esophagus after the capsule endoscope has been seen, you can take a picture of the capsule in a downward direction.
- the endoscope is in the reverse direction (upward or backward) If you proceed, there is an inconvenience that you cannot meet these observation requirements.
- the present invention has been made in view of the above, and an object thereof is to provide an in-vivo image capturing apparatus capable of ensuring imaging in only a desired direction within a subject. Means for solving the problem
- an in-vivo image capturing apparatus can be introduced into a subject and can be imaged in both directions.
- a photographing direction of the imaging optical system based on a detection result of the gravity direction by the gravity sensor, and a gravitational sensor for detecting the gravitational direction of the capsule casing in the subject.
- an imaging selection unit that selects one of the two end directions.
- the imaging optical system includes two imaging optical systems each having an imaging element and having different imaging directions, and the imaging The selection unit selects one of the two imaging optical systems.
- the imaging optical system is provided separately with one image sensor shared for photographing in both end directions and in both end directions. Two image-forming optical systems for forming a photographed image on the image sensor, and a switching mirror for selectively enabling a photographed image of only one of the two image-forming optical systems to the image sensor, The imaging selection unit switches the switching mirror and selects one of the two imaging optical systems.
- the in-vivo image capturing device is characterized in that, in the above invention, the switching mirror is a MEMS (micro 'elect mouth' mechanical 'system) mirror.
- MEMS micro 'elect mouth' mechanical 'system
- the gravity sensor is an acceleration sensor.
- the in-vivo image capturing device is based on the above invention !, and the imaging selection unit is configured so that the direction of gravity detected by the gravity sensor is the imaging direction. One of the directions is selected.
- the switching of the switching mirror is performed in a period other than the imaging period of the image sensor.
- the in-vivo image capturing device can be introduced into a subject and has a capsule-type housing incorporating an imaging optical system capable of photographing only in one end side direction, and the capsule-type housing. And an orientation guide member that is provided on the other end side of the body and guides the capsule-type casing so that the one end side of the capsule-type casing moves forward in the subject.
- the directing guide member comprises a tail fin-like member.
- the directing guide member comprises a plurality of thread-like members.
- the orientation guide member is also a plurality of blade-like members.
- the in-vivo image capturing device is the above-described orientation guide.
- the id member also has a material force that melts into the subject.
- the orientation guide member is a separate member that is retrofitted to the capsule-type housing before introduction into the subject.
- the in-vivo image capturing device can be introduced into a subject and has a capsule-type housing incorporating an imaging optical system capable of photographing only in one end side direction, and the capsule-type housing. And a pair of convex members provided on both sides of the end portion side position from the center of gravity position of the body.
- the end portion side position is an end portion side position on the other end side with respect to the gravity center position.
- the in-vivo image capturing device can be introduced into a subject, and has a capsule-type housing incorporating an imaging optical system capable of photographing only in one end side direction, and the capsule-type housing. And a pair of wheel-shaped members that are formed larger than the diameter of the body and are rotatably provided on both sides closer to the end side than the center of gravity of the capsule housing.
- the end portion side position is an end portion side position on the other end side with respect to the gravity center position.
- the in-vivo image capturing device is characterized in that, in the above invention, the center of gravity of the capsule-type casing is a center position of the capsule-type casing. .
- the position of the center of gravity of the capsule-type casing is decentered to one side from the center of the capsule-type casing. It is characterized by being.
- the in-vivo image capturing device is characterized in that, in the above invention, the position of the center of gravity of the capsule-type casing is a center position of the capsule-type casing. .
- the position of the center of gravity of the capsule-type casing is decentered to one side from the center of the capsule-type casing. It is characterized by being.
- a compound eye type capable of photographing in both directions. Since the gravity direction in the subject of the capsule casing is detected and one of the two end directions is selected as the imaging direction based on the detection result, the gravity direction side is selected as the imaging direction of the imaging optical system.
- the gravity direction side is selected as the imaging direction of the imaging optical system.
- the one end side of the capsule-type casing is forward and the other end side of the monocular capsule-type casing capable of capturing only one end-side direction is the forward direction. Since the orientation guide member is provided to guide the subject so as to advance in the subject, the orientation guide member is provided so that one end side capable of imaging the capsule-type housing in the subject always advances in the forward direction. Therefore, it is possible to secure imaging with the front direction side being a desired imaging direction in the monocular type.
- a pair of convex members on both sides of the end portion side position rather than the gravity center position of the monocular capsule-type housing capable of capturing only in the one end side direction For example, when the capsule casing descends in the esophagus, the convex member is positioned at a desired end side position on the other end side or one end side from the center of gravity position.
- the center of gravity of the capsule-type housing is higher than the convex member, which can contact the inner wall of the lumen and become the rotation axis even if the imaging direction is not the desired direction.
- the capsule housing rotates around the convex member so as to be on the lower side, and there is an effect that imaging in only a desired direction can be secured in the monocular type.
- the capsule-type housing is provided on both sides of the end portion side position rather than the center of gravity of the monocular capsule-type housing capable of photographing only in the one end side direction. Since a pair of wheel-shaped members larger than the diameter are provided, the wheel-shaped member is positioned at a desired end side position on the other end side or one end side with respect to the center of gravity position.
- the center of gravity of the capsule-type housing is above the wheel-shaped member that can contact the inner wall of the lumen and become the rotation axis even if the imaging direction is not the desired direction. Therefore, the capsule-type housing rotates around the wheel-shaped member so that the center of gravity position is lower than the wheel-shaped member. There is an effect that it can be secured.
- FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system which is a preferred embodiment of an in-vivo imaging device according to the present invention.
- FIG. 2 is a longitudinal side view showing a schematic configuration of the capsule endoscope shown in FIG. 1.
- FIG. 3 is a schematic block diagram showing an internal circuit configuration of the capsule endoscope.
- FIG. 41 is a longitudinal side view showing an example of progress of a capsule endoscope in a body cavity.
- FIG. 42 is a longitudinal sectional side view showing another example of the progress of the capsule endoscope in the body cavity.
- FIG. 5 is a longitudinal side view showing a schematic configuration of a capsule endoscope according to a second embodiment of the present invention.
- FIG. 6 is a schematic block diagram showing an internal circuit configuration of the capsule endoscope.
- FIG. 7-1 is a longitudinal side view showing an example of the progress of the capsule endoscope in the body cavity.
- FIG. 7-2 is a longitudinal side view showing another example of the progress of the capsule endoscope in the body cavity.
- FIG. 8-1 is a side view showing a schematic configuration by cutting out a part of the capsule endoscope according to the third embodiment of the present invention.
- Fig. 8-2 is a plan view of Fig. 8-1.
- FIG. 9 is a side view showing a schematic configuration with a part of the capsule endoscope of the first modification cut away.
- FIG. 10 is a side view showing a schematic configuration with a part of the capsule endoscope of the second modification cut away.
- FIG. 11-1 is a side view showing a schematic configuration by cutting away a part of the capsule endoscope of the fourth embodiment of the present invention.
- FIG. 11 2 is a plan view of FIG.
- FIG. 12 is an explanatory view schematically showing the progress of the capsule endoscope in the esophagus.
- FIG. 13-1 is a side view showing a schematic configuration with a part of the capsule endoscope of the third modification cut away.
- FIG. 13-2 is a plan view of FIG. 13-1.
- FIG. 14 is an explanatory view schematically showing the progress of the capsule endoscope in the esophagus.
- FIG. 15 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system which is a preferred embodiment of the in-vivo imaging system according to the present invention.
- FIG. 16 is a schematic block diagram showing a pure internal circuit configuration.
- FIG. 17 is a front view showing a state of observing a captured image of a capsule endoscope before the capsule is swallowed.
- FIG. 18 is a front view showing a state of direction detection when a capsule endoscope is present at an intraoral position.
- FIG. 19 is a longitudinal side view showing a schematic configuration of a capsule endoscope used in the in-vivo imaging system of Embodiment 6 of the present invention.
- FIG. 20 is a schematic block diagram showing an internal circuit configuration of a capsule endoscope. Explanation of symbols
- FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system which is a preferred embodiment of an in-vivo image capturing device according to the present invention.
- This intra-subject information acquisition system uses a capsule endoscope as an example of an in-vivo image capturing device.
- an in-subject information acquisition system is introduced into a subject 1, and a capsule endoscope 2 that takes an image of a body cavity and transmits data such as a video signal, and a subject 1
- a receiving device 3 used for receiving a radio signal transmitted from the introduced capsule endoscope 2 is provided.
- the receiving device 3 is used while being carried by the subject 1 and is used for receiving a radio signal received from the capsule endoscope 2.
- the in-vivo information acquiring system includes a display device 4 that displays an image in the body cavity based on a video signal received by the receiving device 3, and the receiving device 3 and the display device 4. And a portable recording medium 5 for exchanging data with each other.
- the receiving antennas Al to An are provided in a receiving jacket that can be worn by the subject 1, for example, and the subject 1 wears this receiving jacket so that the receiving antennas Al to An are attached. Also good. In this case, the receiving antennas Al to An may be detachable from the jacket! /.
- the display device 4 is for displaying an in-vivo image captured by the capsule endoscope 2, and displays a workstation based on data obtained by the portable recording medium 5 or the like. And so on. Specifically, the display device 4 may be configured to directly display an image using a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer. .
- the portable recording medium 5 uses a Compact Flash (registered trademark) memory or the like, is detachable from the receiving device 3 and the display device 7, and outputs information when it is attached to both. Or it has a structure which can be recorded.
- the portable recording medium 5 is attached to the display device 4 of the workstation and stored with identification information such as an inspection ID before the inspection, for example, and received immediately before the inspection.
- the identification information is read out by the receiving device 3 and registered in the receiving device 3. While the capsule endoscope 2 is moving in the body cavity of the subject 1, the portable recording medium 5 is inserted into the receiving device 3 attached to the subject 1 to be inserted into the capsule endoscope. Record the data sent from 2.
- the apparatus 4 has a configuration in which data recorded on the portable recording medium 5 is read. For example, by passing data between the receiving device 3 and the display device 4 using the portable recording medium 5, the subject 1 can freely operate during imaging in the body cavity, and the display device This also contributes to shortening the data transfer period between the four. Note that data is transferred between the receiving device 3 and the display device 4 using another recording device built in the receiving device 3, such as a node disk. For data exchange between the two, both may be configured to be wired or wirelessly connected.
- FIG. 2 is a longitudinal side view showing a schematic configuration of the capsule endoscope 2 shown in FIG.
- a capsule-type endoscope 2 according to the first embodiment includes a capsule-type casing 11 that can be introduced into the body cavity of the subject 1, and a capsule-type casing 11 that is incorporated in the capsule-type casing 11. It is configured as a compound eye type equipped with two imaging optical systems 12a and 12b capable of photographing in the front and rear direction.
- the capsule endoscope 2 includes not only a battery, circuit components, an antenna, etc., but also an acceleration sensor 13 as a gravity sensor.
- the capsule housing 11 is of a size that can be swallowed into the oral force body of the subject 1, and is a substantially hemispherical, transparent or translucent tip cover 11a, l ib and visible light.
- An outer case that seals the inside liquid-tightly is formed by elastically fitting a cylindrical body cover 11c having a colored material force that is opaque.
- the imaging optical system 12a is in a capsule-type housing 11, and includes, for example, a plurality of light emitting elements such as LEDs that emit illumination light for illuminating a subject site in a body cavity through the tip cover 11a portion.
- 14a hereinafter referred to as “LED14a”
- an image sensor 15a hereinafter referred to as “CCD15a”
- CCD15a image sensor
- an imaging lens 16a for forming an image of the subject, and photographing in the end direction on the tip cover 11a side is possible.
- the imaging optical system 12b is in the capsule casing 11, and for example, emits a plurality of light sources such as LEDs that emit illumination light for illuminating a subject site in the body cavity via the tip cover rib part.
- An element 14b (hereinafter referred to as “LED14b”), an image sensor 15b such as a CCD or CMOS (hereinafter referred to as “CCD15b”) that receives the reflected light from the illumination light and images the region to be inspected, and this
- an imaging lens 16b that forms an image of the subject on the CCD 15b, and is capable of photographing in the end direction on the tip cover ib side.
- the acceleration sensor 13 is for detecting the gravitational direction of the capsule casing 11 introduced into the body cavity of the subject 1 using the gravitational acceleration.
- the capsule sensor 11 1 It is arrange
- FIG. 3 is a schematic block diagram showing the internal circuit configuration of the capsule endoscope 2.
- the signal processing / control unit 21a is for controlling the LED 14a and the CCD 15a that make a pair, and has an LED drive circuit 22a and a CCD drive circuit 23a corresponding to the LED 14a and the CCD 15a, respectively.
- the signal processing control unit 21a includes an image processing unit 24a that performs predetermined image processing such as correlated double sampling processing, amplification processing, AZD conversion processing, and multiplexing processing on the output signal output from the CCD 15a. .
- the signal processing control unit 21a includes a control unit 26a having a timing generator (TG) and a sync generator (SG) 25a for generating various timing signals and synchronization signals, and is generated by the timing generator and the sync generator 25a. Based on the timing signal and the synchronization signal, the operation of the drive circuits 22a, 23a and the image processing unit 24a, the operation timing thereof, and the like are controlled.
- TG timing generator
- SG sync generator
- the signal processing control unit 21b controls the LED 14b and the CCD 15b that make a pair, and includes an LED driving circuit 22b and a CCD driving circuit 23b corresponding to the LED 14b and the CCD 15b, respectively.
- the signal processing control unit 21b includes an image processing unit 24b that performs predetermined image processing such as correlated double sampling processing, amplification processing, AZD conversion processing, and multiplexing processing on the output signal output from the CCD 15b.
- the signal processing control unit 21b includes a control unit 26b having a timing generator (TG) and a sync generator (SG) 25b for generating various timing signals and synchronization signals, and is generated by the timing generator and the sync generator 25b. Based on the timing signal and the synchronization signal, the operation of the drive circuits 22b and 23b and the image processing unit 25b, the operation timing thereof, and the like are controlled.
- TG timing generator
- SG sync generator
- control units 26a and 26b have a master-slave relationship in which the control unit 26a side is a master and the control unit 26b side is a slave, and the control unit 26b follows the enable signal EB according to the enable signal EB on the control unit 26a side. Executes the control operation by following the control unit 26a so that it operates only during H level.
- the control unit 26a also selects one of the imaging optical system 12a and the imaging optical system 12b according to the detection result of the capsule casing 11 detected by the acceleration sensor 13 in the gravitational direction.
- An imaging selection unit 27 that selects only one of them to operate.
- the forward direction (gravity direction side) of the force pusher endoscope 2 is set as a desired imaging direction
- the imaging selection unit 27 indicates that the gravity direction detected by the acceleration sensor 13 is the tip cover 11a side. If the gravity direction detected by the acceleration sensor 13 is on the tip cover ib side, control is performed so that the LED 14a and the CCD 15a are operated, and the enable signal is detected.
- EB is set to the H level, and the LED 14b and the CCD 15b are controlled to operate, and the image is taken by the imaging optical system 12b.
- the capsule endoscope 2 includes a transmission module 28 and a transmission antenna 29 that are provided on an output path of imaging data that has passed through the image processing units 24a and 24b and that output an RF modulation signal.
- the distal end cover 11a side or the distal end cover rib side is the front side in the advancing direction, and the inside of the body cavity.
- the acceleration sensor 13 detects that the gravitational direction of the capsule-type casing 11 is closer to the tip cover 1 la, as indicated by an arrow in FIG. 4-1.
- the imaging selection unit 27 selects only the imaging optical system 12a side, and drives the drive circuits 22a and 23a under the control of the control unit 26a. Turn on the light to execute the imaging operation by CCD15a.
- the capsule endoscope 2 captures only the image inside the body cavity on the distal end cover 11a side facing downward, and after processing the image data with the image processing unit 24a, it receives the reception device 3 through the transmission module 28 and the transmission antenna 29. To the side.
- the acceleration sensor 13 when the distal end cover ib side is directed downward and forwards in the body cavity of the subject 1, the acceleration sensor 13 is indicated by an arrow in Fig. 4-2. As shown, it detects that the gravitational direction of the capsule casing 11 is closer to the tip cover l ib.
- the imaging selection unit 27 sets the enable signal EN from the control unit 26a to the control unit 26b to the H level in order to select only the imaging optical system 12b side. Under the control of the control unit 26b, the drive circuits 22b and 23b are driven to turn on the LED 14b and execute the imaging operation by the CCD 15b.
- the capsule endoscope 2 captures only the image inside the body cavity on the front end cover ib side, which faces downward, and processes the image data with the image processing unit 24b. Then, the capsule endoscope 2 receives the image through the transmission module 28 and the transmission antenna 29. Send to 3 side.
- the acceleration sensor 1 determines the gravity direction in the subject 1 of the capsule casing 11. Since the imaging optical system 12a or 12b is selected so that the desired direction of gravity always becomes the shooting direction based on the detection result, the imaging optical system 12a or 12b is selected for imaging. Even if the cover 1 la, 1 lb moves forward with the front facing downward, or even if the front-rear direction is reversed halfway, it will always face downward in the subject 1. Imaging in only the direction can be ensured. In addition, since upward rearward imaging is not performed, the image data to be captured and the observation time can be suppressed to the same level as in the case of a monocular type even with a compound eye type.
- FIG. 5 is a longitudinal side view showing a schematic configuration of the capsule endoscope 30 according to the second embodiment of the present invention.
- a capsule endoscope 30 according to the second embodiment is a compound-eye capsule provided with one CCD 15 that is shared for imaging in both directions, instead of the CCD 15a and 15b of the capsule endoscope 2 shown in FIG. It is a type endoscope.
- the LED 14a and the imaging lens 16a constitute an imaging optical system 31a for forming an image on the tip cover 11a side with respect to the CCD 15 and the LED 14b and the imaging lens 16b are provided with respect to the CCD 15.
- the tip cover l ib side image forming optical system 3 lb is formed to form an image.
- these imaging optical systems 3 la and 31b are MEMS (micro-electric apertures) as switching mirrors that are selectively switched and displaced so that only one of the optical systems is effective on the common optical path with respect to the CCD 15. 'Mechanical system' with mirror 32.
- the MEMS mirror 32 is driven to be displaced so as to switch the optical path by an actuator 33 such as a piezoelectric element. That is, the imaging optical system 12 of the second embodiment is powered by one CCD 15, two imaging optical systems 31a and 31b, and a MEMS mirror 32.
- Other configurations are the same as those of the capsule endoscope 2, and the acceleration sensor 13 is also incorporated.
- the acceleration sensor 13 can also be configured as a MEMS acceleration sensor in the same manner as the MEMS mirror 32.
- FIG. 6 is a schematic block diagram showing an internal circuit configuration of the capsule endoscope 30.
- the signal processing / control unit 21 is for controlling the LEDs 14a and 14b in the respective imaging optical systems 31a and 31b, the common CCD 15 and the actuator 33 for the MEMS mirror 32, and the LED 14a and 14b and the CCD 15, respectively.
- LED driving circuits 22a and 22b, CCD driving circuit 23, and actuator driving circuit 34 corresponding to the actuator 33 are provided.
- the signal processing / control unit 21 has an image processing unit 24 that performs predetermined image processing such as correlated double sampling processing, amplification processing, AZD conversion processing, and multiplexing processing on the output signal output from the CCD 15. . Further, the signal processing / control unit 21 includes a control unit 26 having a timing generator (TG) and a sync generator (SG) 25 for generating various timing signals and synchronization signals, and the timing generated by the timing generator and the sync generator 25. Based on the signal and the synchronization signal, the operation of the drive circuits 22a, 22b, 23, 34 and the image processing unit 24, the operation timing thereof, and the like are controlled.
- TG timing generator
- SG sync generator
- the control unit 26 only one of the imaging optical system 31a and the imaging optical system 31b operates in accordance with the detection result in the gravitational direction of the capsule casing 11 detected by the acceleration sensor 13.
- An image pick-up selection unit 35 is selected.
- the forward direction (gravity direction side) of the capsule endoscope 30 is set as a desired imaging direction, and the imaging selection unit 35 determines that the gravity direction detected by the calo speed sensor 13 is the tip cover 11a side.
- the actuator 33 is driven to switch and displace the MEMS mirror 32 to enable the imaging optical system 31a side, and the LED 14a is controlled to operate to control the imaging optical system 31a and Capture with CC D15.
- the imaging optical system 31b side is enabled by driving the actuator 33 and switching the MEMS mirror 32, and The LED 14b is controlled to operate and imaged by the imaging optical system 3 lb and CCD 15. It should be noted that the timing of switching displacement of the MEMS mirror 32 is preferably performed at a timing when the CCD 15 does not capture an image.
- the distal end cover 11a side or the distal end cover rib side becomes the front side in the advancing direction and the body cavity Inside
- the acceleration sensor 13 detects that the gravitational direction of the capsule casing 11 is close to the tip cover 1 la, as indicated by an arrow in FIG.
- the imaging selection unit 35 drives the actuator 33 to switch and displace the MEMS mirror 32 as shown in Fig. 7-1.
- the capsule endoscope 2 captures only the in-front image of the body cavity facing downward on the distal end cover 11a side, processes the image data with the image processing unit 24, and then receives the reception device 3 through the transmission module 28 and the transmission antenna 29. To the side.
- the acceleration sensor 13 when the distal end cover ib side is a downward front side and advances in the body cavity of the subject 1, the acceleration sensor 13 is indicated by an arrow in FIG. As shown, it detects that the gravitational direction of the capsule casing 11 is closer to the tip cover l ib. In response to this gravity direction detection result by the velocity sensor 13, the imaging selection unit 35 drives the actuator 33 to switch and displace the MEMS mirror 32 as shown in FIG. Only the 31b side is enabled, and under the control of the control unit 26, the drive circuits 22b and 23 are driven to turn on the LED 14b and execute the imaging operation by the CCD 15.
- the capsule endoscope 2 captures only the image in the body cavity on the front end side facing the tip cover ib, and the image processing unit 24 processes the captured image data. Then, the capsule endoscope 2 receives the image through the transmission module 28 and the transmission antenna 29. Send to 3 side.
- the acceleration sensor 1 determines the gravity direction in the subject 1 of the capsule casing 11.
- the imaging optical system 3 la or 3 lb is made effective by switching the displacement of the MEMS mirror 32 so that the gravitational direction side, which is the desired direction, is always in the shooting direction based on the detection result. Therefore, even if either the front end cover 11a or l ib of the capsule-type casing 11 moves forward and downward, or even if the front-rear direction is reversed halfway, the subject It is always possible to secure images only in the downward and forward direction within 1.
- the CCD15 is shared and can be used at low cost. Since the rear side is not imaged, the image data and observation time for the compound eye type can be reduced to the same level as for the monocular type.
- the forward direction (gravity direction side) of the capsule endoscope 2 or 30 is set as a desired imaging direction, and the acceleration sensor 13 detects the gravity direction.
- the result is controlled so that the gravitational direction side is the shooting direction, but if the capsule endoscope 2 or 30 rearward direction (antigravity direction side) is the desired shooting direction, the acceleration sensor Control may be made so that the anti-gravity direction side becomes the shooting direction based on the result of detecting the gravity direction by 13.
- FIG. 8-1 is a side view showing a schematic configuration by cutting out a part of the capsule endoscope according to the third embodiment, and FIG. 8-1 is a plan view thereof.
- the capsule endoscope 40 includes a capsule-type casing 41 that can be introduced into the body cavity of the subject 1, and a capsule-type casing 41 that is built in the capsule-type casing 41 and is only in one end side direction. It is configured as a monocular type equipped with an image pickup optical system 42 capable of taking images.
- the capsule endoscope 40 includes a battery, circuit components, an antenna, and the like (not shown), and a tail fin-like member 43 as an orientation guide member provided on the other end side of the capsule housing 41. .
- the capsule-type casing 41 is of a size that can be swallowed into the oral force of the subject 1, and is a substantially hemispherical tip cover 41a that is transparent or translucent, and is opaque to visible light.
- An outer case that seals the inside in a liquid-tight manner is formed by elastically fitting a bottomed cylindrical body cover 41b that also has excessive colored material strength.
- the imaging optical system 42 is in a capsule-type housing 41, and, for example, a plurality of light emitting elements such as LEDs that emit illumination light for illuminating a subject site in a body cavity via the tip cover 41a portion 44 (hereinafter referred to as “LED44”), an image sensor 45 such as a CCD or CMOS that receives the reflected light from the illumination light and images the region of the subject (hereinafter “CCD45” t, as a representative)
- An image forming lens 46 for forming an image of a subject on the CCD 45 is provided, and photographing only in one end side direction on the tip cover 4 la side is possible.
- the tail fin-like member 43 is formed into a flat shape like a fish tail fin, and is a capsule-type casing 4 1 is provided on the rear end side (the other end opposite to the front end cover 41a), and the front end cover 41a side of the capsule-type casing 41 introduced into the body cavity of the subject 1 is always forward. It is for the guide to be directed to advance in the body cavity.
- one end of the capsule casing 41 is arranged on the other end side of the monocular capsule casing 41 capable of photographing only in one end side direction. Since it has a tail fin-shaped member 43 that guides the side so that it always moves forward and moves inside the subject 1, no matter which direction the subject 1 swallows the oral force capsule endoscope 40, The tail fin-shaped member 43 moves while contacting the throat, and the tip cover 41a side is oriented in the forward direction. Therefore, in the monocular type, it is possible to ensure imaging with the front side as the desired photographing direction. .
- the tail fin-shaped member 43 may be integrated with the capsule-type casing 41, but may be formed by a separate member and attached to the rear end side of the capsule-type casing 41. .
- the tail fin-like member 43 can be made of a material that melts in the body cavity of the subject 1 such as a gelatin material or an oblate paper material.
- FIG. 9 is a side view showing a schematic configuration with a part of the capsule endoscope of the first modification cut away.
- this modification 1 instead of the tail-shaped member 43 of the capsule endoscope 40 shown in FIGS. 8A and 8B, a plurality of thread-like members 47 are provided as directing guide members. It is. Since the thread-like member 47 easily sticks to the oral cavity, it can be easily swallowed with the tip cover 41a side facing the throat, and the tip cover 41a side is always oriented in the forward direction. Therefore, it is possible to secure imaging with the desired shooting direction.
- FIG. 10 is a side view showing a schematic configuration with a part of the capsule endoscope of the second modification cut away.
- a plurality of blade-like members 48 are provided as directing guide members in place of the tail-like member 43 of the capsule endoscope 40 shown in FIGS. 8-1 and 8-1. It is a thing.
- the wing-like member 48 is difficult to advance in the direction in which the wings spread, and further, the tip cover 41a side always advances in the forward direction in order to suppress the rotation of the capsule housing 41 in the luminal organ of the subject 1. Therefore, in the monocular type, it is possible to ensure imaging in which the front direction side is the desired imaging direction.
- thread-like member 47 and the blade-like member 48 of the first and second modifications may be integrated with the capsule-type casing 41, they are formed by separate members and are provided on the rear end side of the capsule-type casing 41. It may be added later.
- FIG. 11-1 is a side view showing a schematic configuration by cutting out a part of the capsule endoscope of the fourth embodiment
- FIG. 112 is a plan view thereof.
- the capsule endoscope 50 includes a capsule-type casing 51 that can be introduced into the body cavity of the subject 1, and a capsule-type casing 51 that is built in the capsule-type casing 51 and only in one end side direction. It is configured as a monocular type equipped with an image pickup optical system 52 capable of taking pictures.
- the capsule endoscope 50 includes a battery, circuit components, an antenna, and the like (not shown), and a pair of convex members 53 provided on both sides of the capsule housing 51 at the other end side position.
- the capsule-type casing 51 is sized so that the oral force of the subject 1 can be swallowed into the body, and is a substantially hemispherical tip cover 51a that is transparent or translucent, and is opaque to visible light.
- An outer case that seals the inside liquid-tightly is formed by elastically fitting a bottomed cylindrical body cover 51b that also has excessive colored material strength.
- the imaging optical system 52 is in a capsule-type casing 51, and, for example, a plurality of light emitting elements such as LEDs that emit illumination light for illuminating a subject site in a body cavity via the tip cover 51a portion 54 (hereinafter referred to as “LED54”), an image sensor 55 (hereinafter referred to as “CCD55”) such as a CCD or CMOS that receives reflected light from the illumination light and images the region of the subject, And an imaging lens 56 that forms an image of the subject, and photography is possible only in one end side direction on the front end cover 5 la side.
- a plurality of light emitting elements such as LEDs that emit illumination light for illuminating a subject site in a body cavity via the tip cover 51a portion 54 (hereinafter referred to as “LED54”)
- an image sensor 55 (hereinafter referred to as “CCD55”) such as a CCD or CMOS that receives reflected light from the illumination light and images the region of the subject
- the pair of convex members 53 contact the inner wall of the esophageal lumen when the capsule casing 51 advances in the body cavity of the subject 1, particularly in the esophagus.
- the capsule-shaped casing 51 is projected in a hemispherical shape so as to form a rotation axis.
- the pair of convex members 53 are located at the center of gravity set at the center position of the capsule casing 51. It is provided at a position on the other end side from the position G (the other end side position opposite to the tip cover 41a).
- the center-of-gravity position G is not limited to the center position of the capsule-type casing 51, and may be a position eccentric in the front-rear direction.
- FIG. 12 is an explanatory diagram schematically showing the progress of the capsule endoscope 50 in the esophagus 57. In this case, as shown in FIG.
- the casing 51 rotates so as to be turned upside down with the convex member 53 as a rotation axis.
- the front end cover 51a side is directed downward, and imaging with the forward direction (downward side) of the capsule endoscope 50 in the traveling direction can be performed.
- FIG. 13-1 is a side view showing a schematic configuration by cutting out a part of the capsule endoscope of the third modification
- FIG. 13-2 is a plan view thereof.
- a capsule endoscope 50 according to the third modification includes a pair of wheel-like members 58 instead of the pair of convex members 53 shown in FIGS. 11-1 and 11-2.
- the pair of wheel-shaped members 58 is formed to have a diameter larger than the diameter of the capsule-shaped casing 51, and is located at the other end side of the center of gravity G of the capsule-shaped casing 51 (opposite to the tip cover 41a).
- the other end side position) is rotatable with respect to the rotary shaft 59 provided on both sides.
- the center-of-gravity position G is not limited to the center position of the capsule casing 51, but may be a position eccentric in the front-rear direction.
- FIG. 14 is an explanatory diagram schematically showing a progress state in the esophagus 57 of the capsule endoscope 50 of the third modification.
- the capsule endoscope 50 is swallowed so that the imaging direction is opposite (upward)
- the patient is lowered in the esophagus 57 of the subject 1.
- the capsule-type casing 51 can rotate around the rotation axis 59.
- the center-of-gravity position G of the capsule-type casing 51 is in an upward orientation relative to the pair of wheel-shaped members 58 (rotating shaft 59). For this reason, the capsule endoscope 50 is in an unstable state, and as shown in FIGS. 14 (b) and 14 (c), the center of gravity position G is lower than the wheel-shaped member 58 (rotating shaft 59).
- the capsule-type casing 51 rotates so as to be turned upside down around the rotation axis 59. As a result, the distal end cover 51a side is directed downward, and imaging with the forward direction (downward side) of the capsule endoscope 50 in the traveling direction can be performed.
- the forward direction (downward side) of the capsule endoscope 50 in the traveling direction is set as a desired imaging direction, and the pair of convex members 53 and wheel-shaped members are used.
- 58 is the end position on the rear end side of the center of gravity position G.
- a pair of convex 53 and wheels may be provided at the end side position on the front end side (tip cover 51a side) from the gravity center position G.
- FIG. 15 is a schematic diagram showing the overall configuration of a wireless in-vivo information acquiring system which is a preferred embodiment of the in-vivo imaging system according to the present invention.
- This intra-subject information acquisition system uses a monocular capsule endoscope that can capture images in only one end direction as an example of an in-vivo image capturing device.
- the forward direction of the capsule endoscope is set as a desired imaging direction.
- the in-subject information acquisition system is introduced into the subject 61, captures an in-vivo image and transmits data such as a video signal, and is carried by the subject 1.
- the receiving device 63 that receives radio signals transmitted from the capsule endoscope 62 introduced into the subject 61 and the receiving device 63 is detachable with a pure cable 64. And a pure 65 as a simple image observation device that simply displays an image captured by the capsule endoscope 62 based on an electrical signal output from the receiving device 63.
- the in-vivo information acquiring system includes a display device 66 that displays an in-vivo image based on an image signal received by the receiving device 63, the receiving device 63, and the display device.
- a portable recording medium 67 for exchanging data with 6 is provided.
- the receiving device 63 has an antenna unit 63a having a plurality of receiving antennas A1 to An attached to the external surface of the subject 61, and a radio signal received through the antenna unit 63a.
- a main unit 63b, and these units 63a and 63b are detachably connected via connectors.
- the receiving antennas Al to An are provided in a receiving jacket that can be worn by the subject 61, for example, and the subject 61 wears the receiving antennas Al to An by wearing this receiving jacket. May be.
- the receiving antennas Al to An may be detachable from the jacket.
- the display device 66 is for displaying an in-vivo image taken by the capsule endoscope 62, and is based on data obtained by the portable recording medium 67 or the like. It has a configuration such as a workstation that performs image display. Specifically, the display device 4 may be configured to directly display an image using a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.
- the portable recording medium 67 uses a Compact Flash (registered trademark) memory or the like, and is detachable from the receiving device 63 and the display device 66, and when the portable recording medium 67 is inserted into the both, information is stored. It has a structure that can be output or recorded.
- the portable recording medium 67 is inserted into the display device 66 of the workstation before the inspection, and identification information such as the inspection ID is stored. Further, the reception information is received immediately before the inspection. The identification information is read by the receiving device 63 and registered in the receiving device 63.
- the portable recording medium 67 is inserted into the receiving device 63 attached to the subject 61 to be inserted into the capsule endoscope. Record the data sent from mirror 62. Then, after the capsule endoscope 62 is ejected from the subject 61, that is, after imaging of the inside of the subject 61 is completed, the capsule endoscope 62 is taken out from the receiving device 63 and inserted into the display device 66.
- the display device 66 has a configuration in which data recorded on the portable recording medium 67 is read out.
- the subject 61 can freely operate during imaging in the body cavity, and the display device 66 This also contributes to shortening the data transfer period between the two.
- the data transfer between the receiving device 63 and the display device 66 is performed by using another recording device built in the receiving device 63, such as a node disk, for transferring data between the receiving device 63 and the display device 66. Also, you can configure both to be wired or wirelessly connected.
- the pure 65 is a portable type that is formed in a size that can be grasped by the operator's hand.
- the pure 65 is an intra-body-cavity image based on an electrical signal (in-vivo image data) output from the receiving device 63. It has a function to display.
- the pure 65 includes a display unit 68 using a small LCD for image display. 69 is a power switch.
- the pure 65 is a rod-shaped antenna for realizing a reception function for directly receiving a radio signal (in-vivo image data) transmitted from the capsule endoscope 62 without passing through the receiving device 63. It has 70 integrally.
- Pure 65 and Capsule endoscope 62 are used to capture in-vivo images.
- the receiving device 63 and the pure 65 are connected by the pure cap 64, but they are not always used in a connected state. In this state, the pure capsule 64 is removed, and the subject 61 carries only the receiving device 63.
- FIG. 16 is a schematic block diagram showing the internal circuit configuration of the pure 65.
- the pure 65 includes a demodulator 72 that performs demodulation processing on a radio signal received via the antenna 70, and a signal processing circuit 73 that performs predetermined signal processing on the demodulated electric signal. Prepare.
- a power switch 69, a display unit 68, and the like are connected to a control unit 74 having a microcomputer configuration including a CPU and the like that controls the pure 65 as a whole.
- a switching switch 76 for selectively switching the output side of the demodulator 72 and the cable connector 75 side to which the pure cable 64 is connected is provided for the signal processing circuit 73, and the switching control of the switching switch 76 is provided.
- a receiver connection detector 77 is provided.
- a battery for driving each part is built in.
- the control unit 74 includes an analysis unit 78 and a warning unit 79.
- the analysis unit 78 is introduced into the oral cavity of the subject 61 and analyzes the image components captured by the imaging optical system (not shown) of the capsule endoscope 62 located in the oral cavity, thereby enabling the capsule endoscope It is for judging whether the shooting direction of 62 is facing the throat side or the tooth side. More specifically, a whitish image component is obtained when the imaging direction of the capsule endoscope 62 located in the oral cavity faces the tooth side, whereas the imaging direction faces the throat side. In some cases, the image components are generally reddish or deeply reddish, and there is a difference between the two image components. Therefore, the image components captured by the imaging optical system contain more than a predetermined amount of white image components. If a positive analysis result is obtained, it is determined that the capsule endoscope 62 is facing the tooth side.
- the warning unit 79 is for issuing a warning regarding the orientation of the capsule endoscope 62 to the user based on the analysis result of the analysis unit 78. Specifically, when a positive analysis result is obtained by the analysis unit 78, that is, a determination result that the capsule endoscope 62 faces the tooth side instead of the throat side is obtained. If the shooting direction is Since it is not the desired shooting direction (forward direction), for example, the display unit 68 functions to display a warning message such as “the direction of the force pusher is reversed. Please reverse the swallowing direction”.
- the nurse After swallowing the capsule endoscope 62 into the oral cavity, as shown in FIG. 18, the nurse holds the pure 65 in a single state and holds the capsule in the oral cavity of the subject 61.
- the intraoral image data is directly acquired.
- the analysis unit 78 By analyzing the image component of the intraoral image data by the analysis unit 78, the direction of the capsule endoscope 62 in the oral cavity is determined.
- the capsule endoscope 62 faces the tooth side.
- the shooting direction is facing backwards and not the desired shooting direction (forward direction).
- the warning unit 79 displays on the display unit 68 “The capsule direction is reversed. Please reverse the swallowing direction. By displaying a warning message such as ⁇ ! /, '', The doctor or nurse instructs the subject 61 to reorient the capsule endoscope 62 in the oral cavity and then swallow it. Instruct. As a result, imaging in a desired direction in which the shooting direction is the forward direction is possible. On the other hand, if a negative analysis result is obtained in which the white image component included in the image component captured by the imaging optical system is less than a predetermined amount, the capsule endoscope 62 is placed on the throat side. No warning is given.
- the mirror 62 (force-pouch type housing) analyzes the image components captured at the intraoral position, and based on the analysis results. Since the user is warned about the orientation of the capsule endoscope 62 (capsule housing), if the swallowing direction in the oral cavity is not the desired shooting direction, a warning is issued. By having the user correct the swallowing direction of the capsule endoscope 62, imaging in a desired direction can be ensured in the monocular type.
- the analysis unit 78 of the fifth embodiment is directed to the tooth side depending on whether the white image component in the image component captured by the capsule endoscope 62 at the intraoral position is a predetermined amount or more. However, when the tooth side is photographed, the image is bright and reflected by the tooth force, and the brightness is high and image data is obtained. Therefore, the brightness of the image component exceeds a predetermined value. In some cases, it may be determined that the tooth side is facing. Furthermore, in order to improve the accuracy of analysis / judgment, both the conditions of the white image component and the luminance may be considered.
- an analysis unit 78 is provided on the pure 65 side to analyze the image components. The analysis is performed by internal processing in the capsule endoscope 62, and the analysis result is pure. You may make it transmit to the side.
- the forward direction of the capsule endoscope 62 is set as a desired photographing direction, and a warning is given when the capsule endoscope 62 faces the tooth side in the oral cavity.
- the back direction of the capsule endoscope 62 is the desired imaging direction, it was determined that the capsule endoscope 62 was facing the throat in the oral cavity. A warning may be issued occasionally.
- FIG. 19 is a longitudinal sectional side view showing a schematic configuration of a capsule endoscope used in the in-vivo image capturing system of Embodiment 6 of the present invention.
- the capsule endoscope 80 according to the sixth embodiment is used in place of the capsule endoscope 62 in the in-vivo information acquiring system including the pure 65 as shown in FIG. 15, for example.
- a capsule endoscope 80 includes a capsule-type casing 81 that can be introduced into the body cavity of a subject 61, and a capsule-type casing 81 that is built in the capsule-type casing 81 and only in one end side direction. It is configured as a monocular type equipped with an image pickup optical system 82 capable of taking images.
- the capsule endoscope 80 includes a battery, circuit components, an antenna, etc. (not shown), and an ultrasonic transmission / reception device 83 provided on the rear end side (the other end side) of the capsule casing 81. .
- the capsule-type casing 81 is of a size that allows the oral cavity of the subject 61 to be swallowed into the body, and is a substantially hemispherical tip cover 81a that is transparent or translucent, and does not transmit visible light.
- An outer case that seals the inside in a liquid-tight manner is formed by elastically fitting a cylindrical cover 81b having a bottomed cylindrical shape that also has a strong colored material strength.
- the imaging optical system 82 is in a capsule-type housing 41, and, for example, a plurality of light-emitting elements such as LEDs that emit illumination light for illuminating a subject site in a body cavity via the tip cover 81a portion 84 (hereinafter referred to as “LED84”), an image sensor 85 such as a CCD or CMOS (hereinafter referred to as “CCD85”) that receives the reflected light from the illumination light and images the region of the subject, An imaging lens 86 that forms an image of the subject is provided, and photography is possible only in one direction on the tip cover 8 la side.
- the ultrasonic transmission / reception device 83 is for emitting ultrasonic waves toward the rear at the rear end side of the force-pessel type casing 81 and receiving ultrasonic waves reflected and returned.
- FIG. 20 is a schematic block diagram showing the internal circuit configuration of the capsule endoscope 80.
- the signal processing control unit 91 is for controlling the LED 84 and the CCD 85, and has an LED driving circuit 92 and a CCD driving circuit 93 corresponding to the LED 84 and the CCD 85, respectively.
- the signal processing / control unit 91 performs an image processing unit 94 that performs predetermined image processing such as correlated double sampling processing, amplification processing, AZD conversion processing, and multiplexing processing on the output signal output from the CCD 85.
- the signal processing / control unit 91 includes a control unit 96 having a timing generator (TG) and a sync generator (SG) 95 for generating various timing signals and synchronization signals, and is generated by the timing generator and the sync generator 95.
- the operation of the drive circuits 92 and 93 and the image processing unit 94 and the operation timing thereof are controlled based on the timing signal and the synchronization signal.
- the capsule endoscope 80 includes a transmission module 97 and a transmission antenna 98 that are provided on the output path of the imaging data that has passed through the image processing unit 94 and that output an RF modulation signal. Furthermore, the control unit 96 is connected to an ultrasonic transmission / reception device 83 having a transmission unit 99 for emitting ultrasonic waves and a reception unit 100 for receiving ultrasonic waves, and controls the operation timing of emitting ultrasonic waves. Control. In addition, the control unit 96 includes an intensity determination unit 101 and a warning unit 102. Prepare.
- the intensity determination unit 101 is used to determine whether the reception intensity of the ultrasonic wave that is transmitted from the transmission unit 99 and received by the reception unit 100 when the capsule endoscope 80 is located in the oral cavity is equal to or higher than a predetermined value. is there. More specifically, when an ultrasonic wave is emitted in the oral cavity, the tooth side and the throat side are stiffer on the tooth side and the intensity of ultrasonic reflection is higher, so the ultrasonic wave received by the receiving unit 100 is stronger. If the reception intensity is greater than or equal to a predetermined value, it can be determined that the ultrasonic transmission / reception device 83 is facing the tooth side. In this case, the shooting direction (tip cover 81 side) is facing the throat side.
- the warning unit 102 is for issuing a warning regarding the orientation of the capsule endoscope 80 to the user based on the determination result of the determination unit 101. Specifically, when a negative analysis result is obtained by the determination unit 101, that is, a determination result that the capsule endoscope 80 faces the tooth side instead of the throat side is obtained. In this case, the shooting direction is the backward direction and not the desired shooting direction (forward direction). Therefore, by outputting a warning signal to the transmission module 97, the pure 65 (see Fig. 15) side is output. For example, a warning signal is transmitted, and for example, a warning message such as “the capsule is in the opposite direction. Please reverse the swallowing direction” is displayed.
- the control unit 96 transmits and outputs ultrasonic waves to the transmission unit 99 of the ultrasonic transmission / reception device 83.
- the capsule endoscope 80 emits ultrasonic waves toward the rear side in the mouth cavity.
- the ultrasonic wave reflected in the oral cavity is received by the receiving unit 100, and the received signal is output to the intensity determining unit 101.
- the intensity determination unit 101 determines the direction of the capsule endoscope 80 in the oral cavity by determining whether the reception intensity of the ultrasonic wave is equal to or higher than a predetermined value set in advance.
- the capsule endoscope 80 faces the tooth side. It is determined that In this case, since the shooting direction is the backward side and not the desired shooting direction (forward direction), the warning unit 101 sends a warning signal to the pure 65 and outputs it to the display unit 68. If the warning message such as “Reverse swallowing direction! /,” Is displayed, the doctor or nurse The capsule endoscope 80 is instructed to correct the orientation, and then instructed to swallow. As a result, it is possible to perform imaging in a desired direction in which the shooting direction is the forward direction. On the other hand, when a positive determination result is obtained that the ultrasonic wave reception intensity is equal to or higher than the predetermined value, it is determined that the capsule endoscope 62 faces the throat side, and no warning is issued.
- the imaging is performed only in one end side direction.
- a single-lens capsule endoscope 80 (capsule-type casing 81) capable of imaging is used to determine the received intensity of the ultrasonic waves emitted and received toward the rear imaged at the intraoral position, and based on the determination result Since the warning about the orientation of the capsule endoscope 80 (capsule type casing 81) is issued to the user, if the swallowing direction in the oral cavity is not the desired shooting direction, a warning is issued. By having the user correct the swallowing direction of the capsule endoscope 80, it is possible to ensure imaging in a desired direction in the monocular type.
- the capsule endoscope 80 includes the intensity determination unit 101 and the warning unit 102 on the side of the capsule endoscope 80 to perform the determination and the warning. Send it to the pure side, and let the pure side make judgments and warnings.
- the forward direction of the capsule endoscope 80 is set as a desired photographing direction, and a warning is given when the capsule endoscope 80 faces the tooth side in the oral cavity.
- a warning is given when the capsule endoscope 80 faces the tooth side in the oral cavity.
- the back direction of the capsule endoscope 80 is the desired imaging direction, it is determined that the capsule endoscope 80 faces the throat in the oral cavity. A warning may be issued occasionally.
- the in-vivo image capturing device useful for the present invention is useful when a compound-eye or monocular capsule endoscope is used, and in particular, images in only a desired direction within a subject. It is suitable for the case.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN200680048215.4A CN101340842B (zh) | 2005-12-20 | 2006-12-20 | 体内图像摄影装置 |
EP06842904A EP1964506A4 (en) | 2005-12-20 | 2006-12-20 | IN VIVO IMAGE CAPTURE DEVICE |
AU2006328453A AU2006328453B2 (en) | 2005-12-20 | 2006-12-20 | In vivo-image capture device |
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JP2005-366741 | 2005-12-20 | ||
JP2005366741A JP4855771B2 (ja) | 2005-12-20 | 2005-12-20 | 体内画像撮影装置および体内画像撮影システム |
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WO2007072849A1 true WO2007072849A1 (ja) | 2007-06-28 |
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PCT/JP2006/325351 WO2007072850A1 (ja) | 2005-12-20 | 2006-12-20 | 体内画像撮影システム |
PCT/JP2006/325350 WO2007072849A1 (ja) | 2005-12-20 | 2006-12-20 | 体内画像撮影装置 |
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PCT/JP2006/325351 WO2007072850A1 (ja) | 2005-12-20 | 2006-12-20 | 体内画像撮影システム |
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US (2) | US9063393B2 (ja) |
EP (2) | EP1964506A4 (ja) |
JP (1) | JP4855771B2 (ja) |
CN (2) | CN101340842B (ja) |
AU (2) | AU2006328453B2 (ja) |
WO (2) | WO2007072850A1 (ja) |
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CN104665754A (zh) * | 2015-03-11 | 2015-06-03 | 杭州创辉医疗电子设备有限公司 | 无线宫腔镜 |
CN105377102A (zh) * | 2014-05-30 | 2016-03-02 | 株式会社Mu | 胶囊内窥镜 |
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WO2010005571A2 (en) | 2008-07-09 | 2010-01-14 | Innurvation, Inc. | Displaying image data from a scanner capsule |
CN107007988A (zh) * | 2008-10-02 | 2017-08-04 | Yepp澳大利亚有限公司 | 在赛艇运动中用于拍摄图像的系统以及训练方法 |
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US7998067B2 (en) | 2011-08-16 |
EP1964507A4 (en) | 2013-03-13 |
CN101340843A (zh) | 2009-01-07 |
EP1964506A1 (en) | 2008-09-03 |
CN101340843B (zh) | 2010-08-18 |
JP2007167214A (ja) | 2007-07-05 |
US20080015411A1 (en) | 2008-01-17 |
EP1964506A4 (en) | 2013-03-06 |
WO2007072850A1 (ja) | 2007-06-28 |
AU2006328453A1 (en) | 2007-06-28 |
AU2006328453B2 (en) | 2010-03-04 |
AU2006328454A1 (en) | 2007-06-28 |
US20070185381A1 (en) | 2007-08-09 |
JP4855771B2 (ja) | 2012-01-18 |
US9063393B2 (en) | 2015-06-23 |
CN101340842B (zh) | 2010-09-22 |
EP1964507A1 (en) | 2008-09-03 |
AU2006328454B2 (en) | 2010-06-24 |
CN101340842A (zh) | 2009-01-07 |
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