WO2003021850A2 - On-line image processing and communication system - Google Patents
On-line image processing and communication system Download PDFInfo
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- WO2003021850A2 WO2003021850A2 PCT/US2002/027895 US0227895W WO03021850A2 WO 2003021850 A2 WO2003021850 A2 WO 2003021850A2 US 0227895 W US0227895 W US 0227895W WO 03021850 A2 WO03021850 A2 WO 03021850A2
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- WIPO (PCT)
- Prior art keywords
- state parameters
- image data
- telecommunications network
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- receiving stations
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/20—ICT specially adapted for the handling or processing of medical images for handling medical images, e.g. DICOM, HL7 or PACS
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/40—ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
- G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
- G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
Definitions
- the present invention generally relates to miniPACS (Picture
- Teleradiology is a means for electronically transmitting radiographic patient images and consultative text from one location to another.
- Teleradiology systems have been widely used by healthcare providers to expand the geographic and/or time coverage of their service and to efficiently utilize the time of healthcare professionals with specialty and subspecialty training and skills (e.g., radiologists).
- the result is improved healthcare service quality, decreased delivery time, and reduced costs.
- the present invention provides a computer architecture for a client/server-based advanced image processing and rendering system.
- the present invention further provides a computer architecture to support multi- user concurrent usage of the processing server.
- the present invention includes a method and apparatus that combines the network-based conferencing capability with remote interactive advanced image processing capability.
- the present invention enables users from disparate locations to interactively manipulate images and simultaneously view the processed images in an independent or synchronized fashion.
- the present invention further enables a user to interactively view and manipulate the images without having to download the entire volumetric data set.
- the present invention also includes improved methods and procedures for radiology consultation and multi-center trial management involving volumetric images using the above-mentioned technology.
- the present invention may be used for radiology consultation.
- the acquisition of 2D or 3D/volumetric image/data sets or retrieval of previously acquired image/data sets is performed.
- the volumetric data set could be three-dimensional in space, or two- or three-dimensional in space and one-dimensional in time, e.g., time-resolved spatial data sets.
- data is moved to a server, which could be the scanner workstation itself or a separate computer connected to a network, and which has the conferencing software.
- client software is initiated by a remote user/users. Each user is able to remotely access and manipulate the 2D as well as volumetric/3D images with full processing capabilities, including Multiplanar
- MPR Maximum Intensity Projection
- MIP Volume Rendering
- Image segmentation an user may send the image processing request, such as MPR request to the server, the server will render the images accordingly and send the result back.
- each user is able to interactively manipulate volumetric images without transferring the entire dataset, employing an "on-demand" image transmission method.
- Fig. 1 depicts a block diagram of the present invention.
- Fig. 2 depicts an alternative diagram of the present invention.
- Fig. 3 depicts a flowchart of method of the present invention.
- Fig. 4 depicts a description of state parameters which may be used in one embodiment.
- Fig. 5 depicts a flowchart of the state parameter updating method.
- Fig. 1 depicts the teleradiology system described in our previous patent application, United States Patent Application Serial No. 09/434,088.
- the teleradiology system includes as data transmitting station 100, a receiving station 300, and a network 200 connecting the transmitting station 100 and receiving station 300.
- the system may also include a data security system 34 which extends into the transmitting station 100, receiving station 300, and network 200.
- Receiving station 300 comprises a data receiver 26, a send request 22, a user interface 32, a data decompressor 28, a display system 30, a central processing system 24, and, data security 34.
- Transmitting station 100 comprises a data transmitter 16, a receive request 20, a data compressor 14, a volume data rendering generator 12, a central processing system 18, and, data security 34.
- Many image visualization and processing tasks consist of multiple interactive sub-tasks. For example, visualizing a dataset consists of at least two steps (subtasks): 1) generating a processed image to be displayed; 2) displaying the image.
- subtasks are performed by the client and the other by the server.
- generating the processed image to be displayed can be performed in entirety on the server, or, partially on the server and partially on the client. Displaying the processed image is performed on the client.
- FIG. 2 a system is shown wherein, as contemplated in the present invention, several receiving stations 300a-e have access over a network 200 to a transmitting station.
- Each of the receiving stations 300a-e are structured similarly to the receiving station 300 shown in Fig. 1.
- the transmitting station may be considered the server and the receiving stations the clients to use the client/server terminology.
- Fig. 3 a flow chart representing steps performed according to one preferred embodiment is shown.
- one or more users initiate a session by logging in to the server from one of the receiving stations 300a-e.
- one of the logged in users issues a command to form a conference, and identifies a list of users who may participate in the conference.
- the user who initiates the conference may be designated as the conference "driver" by default.
- the conference driver may be, for example, a consulting radiologist. Other designated conference participants may join the conference. Alternatively, the driver may review the list of users logged in and select persons to participate in the conference. The other participants may be, for example, 3D technologists, other radiologists, referring physicians, or other healthcare personnel.
- the driver has the ability to accept or reject a request to join. Alternatively, the driver may designate that the conference is "open," i.e., that other users may join in without an express authorization being made by the driver. 17]
- the driver initiates a processing command from the client side.
- the driver using interface 32, specifies: 1) at least one image data set to be visualized; 2) at least one data rendering method to be used; 3) the rendering parameters used by each rendering method, 4) data compression parameters, and 5) the data transmission parameters for controlling data transmission over network 200. Examples of state parameters are provided in Fig. 4.
- the driver may, via user interface 32, adjust rendering parameters, e.g., viewpoint, spatial region, and value range of the data to be rendered, and other settings.
- the techniques for setting and adjusting these parameters include 1) using preset protocols for some typical settings; 2) inputting a specific setting with a keyboard, a mouse and/or other input devices; and/or 3) interactive navigation using a mouse, a trackball, a joystick, a keyboard and/or other navigating devices.
- This driver may, via user interface 32, edit (including process) patient data, e.g., remove the bone structures, in a manner similar to the current volume data rendering/visualization systems.
- driver can, via user interface 32, define and adjust data rendering methods and parameters, control what is to be rendered, transmitted and visualized next, and eventually obtain the final rendering result.
- a central processing system 24 on the driver's receiving station receives and validates the driver's request.
- the central processing system 24 then issues the request, which is sent via send request 22 to transmitting station 100 through network 200.
- the central processing system 18 on the transmitting station 100 receives the request via receive request 20.
- volume data rendering generator 12 accesses from image data source 10 the image data set which the user has specified, and then generates the data rendering result based on the data rendering method and parameters which the user has specified.
- the rendering result may be a 2D image, much smaller in size than the original data set.
- the data transmitter 16 on transmitting station 100 transmits the compressed data to data receiver 26 on receiving stations 300a-e which have sent a request for image data, i.e., on-demand, via network 200 based on data transmission parameters which the user has specified.
- the on- demand feature of the present invention will be describe further in connection with Fig. 5.
- the preferred transmission medium i.e., network 200
- the preferred data transmission protocol is the standard TCP/IP, although the method may be adapted to accommodate other protocols.
- user 400 can control certain aspects (e.g., the priority level, the speed) of data transmission by selecting transmission parameters via user interface 32.
- the central processing systems 24 of the various receiving stations 300a-e coordinate the client-side processing. If needed, data decompressor 28 decompresses (or restores) the rendering result.
- the central processing system 24 may also perform further image processing and operations. The processing is performed in which the final image is computed based on the field of view and the image window/level (i.e., brightness/contrast) settings currently prescribed by the conference driver.
- the display systems 30 at receiving stations 300a-e display the computed image and other parameters.
- the driver may further modify parameters, including 1) the image data set to be visualized, 2) the data rendering method to be used, 3) the rendering parameters used, and 4) the data transmission parameters used. This process goes on until a satisfactory rendering and visualization result is obtained.
- the set of image processing and display parameters collectively called state parameters, keep track of the effect of image processing, performed either at the server or at a client, and if needed, synchronize the display (viewing) of multiple users. Examples of state parameters are given in Fig. 4. Each time when a new subtask is performed, this set of the state parameters is updated at the server. Any further image processing and display task will be performed based on this set of updated state parameters.
- the resulting images are "pulled" to the clients from the server.
- a client with the driver authorization prescribes an operation and regardless of whether this operation is performed on the client, the server, or the both, the state parameters will be updated on both the server and the driving client to reflect the resultant change due to this operation.
- Other clients periodically compare their local copy of the state parameters with the copy on the server. If some differences are found that require updating the local display, that client will issue the update request. Again, depending on the division of subtasks, some requests are fulfilled by the client only, while the others require that the server sends updated image/information. [0024] Referring now to Fig. 5, the steps involved in state parameter updating will be described.
- State parameter updating is controlled by the client-side conferencing software running on receiving stations 300a-e.
- a check is made with a system clock, or another timing source, to determine whether the amount of time that has elapsed since the last state parameter update, ⁇ t, is equal to a predetermined timing parameter, P t , which determines the frequency with which the state parameters are updated. If ⁇ t > P t , then step 502 is performed. If ⁇ t ⁇ P t , then control returns to the beginning of the routine. For example, P t may be 0.25 to 0.5 seconds.
- one of the receiving station 300 sends a request to the transmitting station for current state parameters associated with the current conferencing session.
- the receiving station 300 compares the state parameters which have been stored locally to the state parameters that are received from the transmitting station after the request made in step 502. If the client state parameters and the server state parameters are equal, then control returns to the beginning of the routine. If the two sets of parameters are not equal, this implies that additional subtasks have been specified by the conference driver, and the routine proceeds to step 504.
- the client sends a request for new image data if the parameters that have changed indicate that new image data has been generated. On the other hand, if only state parameters relating to brightness or contrast level, for example, are changed, then no new image data need be requested, because this change can be processed on the data already stored at the client.
- the client state parameters are set equal to the updated server state parameters.
- ⁇ t is set equal to zero.
- a "push" implementation is utilized. In the push implementation, state parameters are transmitted to the clients whenever they are changed. Also, new image data is transmitted if, as described above, the change in the state parameters required new server-side image processing.
- all remote conference participants may have already had the copy of the same data set on each of their local disk. This may be the case for training or educational applications in which a standard set of data is utilized. In this case, no image data transmission is required over the network.
- the conferencing software running on each participant's computer will generate the new image using the local copy of the data and local computing resources and will synchronize the image display.
- This embodiment is useful when the conference participants only have relatively-narrow bandwidth connection, such as a phone line, which is adequate to communicate the state parameters interactively, but not adequate for transmitting big data files, such as images, at rate allowing real time interaction.
- Updated state parameters in this embodiment may be transmitted to the clients either in a push implementation or a pull implementation.
- any participant in a conference may request to become the driver. Upon approval from the current driver, the driver privilege may be switched to the requesting participant.
- the new driver will then have the full control of the image/data set under study, i.e., the ability to define new state parameters.
- the new driver e.g., a surgeon, may fine tune the 3D model or other parameters to achieve the best view for his intended application.
- the present invention may also be applied to multi-center trial studies, when constant communication of comprehensive information including images and data are needed between multiple participants.
- MRA Magnetic Resonance Angiography
- MRA Magnetic Resonance Angiography
- a 3D volumetric data set comprised of a stack of 2D images, is acquired. This 3D volumetric data set is processed to extract the vascular structure, while minimizing the interference of other unwanted structures.
- the present invention provides an optimized method for multi-center trial management using the teleradiology conferencing technology. This method is designed to optimize the workflow and management of various tasks, such as protocol selection, training/education, trial monitoring, and data management for expert reading. [0032]
- the steps for future multi-center trial management using the present invention include: 1) Using the teleradiology conferencing techniques described herein to choose a trial protocol;
- Reporting Expert reader will report blind read results using the integrated reporting tools provided by a system based on the present invention.
Abstract
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AU2002332797A AU2002332797A1 (en) | 2001-08-31 | 2002-08-30 | On-line image processing and communication system |
Applications Claiming Priority (2)
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US09/945,479 | 2001-08-31 | ||
US09/945,479 US7039723B2 (en) | 2001-08-31 | 2001-08-31 | On-line image processing and communication system |
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WO2003021850A2 true WO2003021850A2 (en) | 2003-03-13 |
WO2003021850A3 WO2003021850A3 (en) | 2003-11-06 |
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AU (1) | AU2002332797A1 (en) |
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AU2002332797A1 (en) | 2003-03-18 |
WO2003021850A3 (en) | 2003-11-06 |
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