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Publication numberUS3670163 A
Publication typeGrant
Publication dateJun 13, 1972
Filing dateJul 6, 1970
Priority dateJul 16, 1969
Also published asDE7018349U
Publication numberUS 3670163 A, US 3670163A, US-A-3670163, US3670163 A, US3670163A
InventorsPierre Lajus
Original AssigneeRadiologie Cie Gle
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Radiological examination apparatus
US 3670163 A
Abstract
A support for a patient, such as a chair, table or the like, is movably mounted on a track to slide horizontally, or move up and down, the track itself being rotatable within a ring-like frame forming a common structural support for the patient supporting device, as well as for an X-ray examining system including an X-ray source and an X-ray receiver, so as to position the patient to have the region of the patient's body to be examined at the center of the ring-shaped structure. The X-ray examining device itself is mounted on a two-axis gimbal, having its center of rotation coincident with the center of the ring-shaped structure, so that the same region of the patient's body can be examined from all angular positions in three dimensions, that is, can be spherically examined.
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United States Patent Lajus 14 1 June 13, 1972 [54] RADIOLOGICAL EXAMINATION 2,103,693 12/1937 Pohl ..250/50 APPARATUS 3,449.569 6/l969 Oller.... ...250/50 3,500,045 3/1970 Rossi ...250/58 [72] inventor: Pierre Lglus, Meudon, France [73] Assignee: Compagnle Generale de Radiologie, Paris, 'r Lawrence France Assistant Examiner-C. E. Church Attorney-Flynn & Frishauf 22 Filed: July 6,1970

[30] Foreign Application Priority Data July 16, i969 France ..6924187 [52] US. Cl ..250/50, 250/57. 250/58, 250/65 R [5!] Int. Cl. ..G03b 41/16 [58] Field ofSearch ..250/50, 57, 65, 58

[56] References Cited UNlTED STATES PATENTS 1,573,57l 2/l926 Pohl ..250/57 Appl. No.: 52,305

[57] ABSTRACT A support for a patient. such as a chair. table or the like, is movably mounted on a track to slide horizontally, or move up and down, the track itself being rotatable within a ring-like frame forming a common structural support for the patient supporting device, as well as for an X-ray examining system including an X-ray source and an X-ray receiver, so as to position the patient to have the region of the patients body to be examined at the center of the ring-shaped structure. The X- ray examining device itself is mounted on a two-axis gimbal, having its center of rotation coincident with the center of the ring-shaped structure, so that the same region of the patient's body can be examined from all angular positions in three dimensions, that is, can be spherically examined.

1 Claim, 2 Drawing Figures PATENTEDJUN 13 m2 SHEET 2 BF 2 RADIOLOGICAL EXAMINATION APPARATUS The present invention relates to radiological examination apparatus, and more particularly to structural arrangements to support the patient with respect to an X-ray source and an X- ray image receiver in such a way that a region of the patients body can be examined from all angular positions in space, and regardless of the position of the patient himself.

In certain radiological examinations, and particularly in X- ray examination of the head, it is necessary to locate an X-ray examining assembly formed of an X-ray source, and an X-ray receiver (such as a screen, a radiographic film, an X-ray image intensifier, an X-ray image television receiving tube or the like) in various positions with respect to the patients head, in such a manner that the X-ray examining assembly can be located around the patients head in three dimensions. In some of these examinations it is desirable that the patient be permitted to move, for reasons of comfort or, for example, to study the level and position of liquids or gases previously injected. Such medical examining techniques have already been done with apparatus in which the assembly of an X-ray generating tube and an X-ray image receiver is arranged to describe a spherical path (or a portion thereof) in space. The center of the sphere can be moved with respect to a fixed vertical axis. Apparatus to carry out such X-ray examination ineludes carrying arms carrying orientational axes forming right angles between themselves and the direction of radiation; in another system, a source-image receiver is movable about an axis which is swingable following an arc of a circle. The patient himself is supported on a table, or similar support, permitting complete rotation in his sagittal plane. It has been the practice to provide patient supports secured to the floor of the examining room, independent of the mountings and holders of the radiological apparatus, the patient supports being arranged to permit rotation of the patient about one, or two axes.

It has been found difiicult in such installations to maintain the center of radiation constant with respect to the sections desired to be radiated, with out substantial manipulation of equipment or the patient on his support. Thus, it proved difficult to maintain the virtual center of the sphere described by the various positions of the X-ray source constant. It easily happened that the center of rotation was subjected to a substantially vertical displacement, so that the center itself, upon movement of the X-ray source in its given path would describe a circular path. Such movement of the center of the sphere defined by various possible paths of the X-ray system was superimposed on movement of the patients head itself. the maximum off-center position which is a function of the diameter of the error circle described by the movement of the patient, was difficult to be compensated except by moving the support of the patient by a similar, compensating amount. To obtain accurate and clearly defined X-ray images, therefore, required complicated and careful manipulation, and it is almost impossible to design appropriate power-operated displacement arrangements which may be remote controlled, because of The variety of possible positions.

It is an object of the present invention to provide a radiological examining apparatus, which can easily be operated by remote control and in which the center of examined part, of the parients body, with respect to all possible axes of radiation, remains constant.

The invention will be described by way of example with reference to the accompanying drawings, wherein:

FIG. 1 is a schematic front view of the apparatus in which the movable elements are placed in a position facilitating explanation of the invention; and

FIG. 2 is a side view of the apparatus of FIG. 1, partly in section, through an axial plane.

A fixed support B is provided to permit movement of the entire radiological apparatus in positions along the circumference of a sphere. Basically, an X-ray examining device is provided including an X-ray source 2 and an X-ray image pickup 3. The image pickup 3 may take many forms, for example an X-ray image intensifier connected to a television receiver, a radiographic plate, or the like. The X-ray examining assembly formed of source 2 and receiver or picture generator 3 is interconnected by a carrying arm 1, rotatable about an axis provided by shaft 4 4. Shaft 4, itself, is mounted in a gimbal 5 rotating, in turn, about axis provided by shafts 6 and located in the plane defined by the axis R-R of the X-ray generator 2. Gimbal 5 is carried at its extremities by two coaxial shafts 6 respectively mounted on two arms 10 which, in turn, are mounted on a ring-shaped structural support 9. The intersection of the axes 4, and that of shafts 6, defines a center 0 of an examining sphere. In FIG. 1, the axis R-R which defines the path of radiation is congruent with the axis of shafts 6.

A patient support 7, which may be a chair, table, or the like, is provided to locate the patient P in sitting or lying-down position. The support itself is also mounted on the ring-shaped support 9 by mounting means allowing its displacement along two axes which are at right angles to each other, as indicated by arrows f f, and fl f in order to center the portion of the body of patient P which is to be radiologically examined to coincide with the center 0 of the sphere. In sitting position, as shown in FIG. I, the patient support, together with the patient, is rotatable in a vertical axis 8, corresponding generally to the longitudinal axis of the patient, permitting rotation of the centered organ of the patients body whose center is located at point 0. The support 7 may be displaced in the plane of the axis 4 of rotation, and parallel thereto along a traverse II which is an integral part of ring-shaped support 9.. Traverse I1 is secured to the ring-shaped member 9, for example by means of a suitable bracket, mounted on the ring 9 at point 12 (FIG. 2). The entire unit of radiological apparatus and patient support is thus a single assembly, by interconnection by the ring-shaped member 9 of which one axis is perpendicular to the plane of the paper of FIG. 1 and passes through the center 0 of the sphere. The ring 9 itself can rotate in the support Bin a vertical plane by means of a drive (which may be remotecontrolled) and which is not shown and well known in the art, for example by a chain transmission a rack and pinion, or worm gear arrangement. Thus, the entire unit of radiological apparatus together with patient may be rotated in a vertical plane. The structure of the apparatus accurately interconnects the position for the patient, on its support, and the source of X-rays, as well as the X-ray receiver for all axes of incidence, that is for all paths of the X-ray beam; thus, a large number of possible X-ray examining positions can be covered, with little handling and permitting substantial versatility and speed in examination. The comfort of the patient is increased and ease of operation for the technician provided. By mean of automatic, or remote-controlled positioning, automatic sequences of pictures can readily be taken, programmed in accordance with a desired pattern, so that a sequence of X-ray images of the same region of the patients body can be obtained, looked at from various angles and orientations.

I claim:

I. Radiological apparatus for examining a patient in any position in space comprising:

a fixed base;

a common structural support mounted on said base for rotation about a first horizontal axis;

a pair of coaxial shafts rotatably mounted on said support to both sides of said first axis for defining a second axis perpendicular to said first one;

a fork-shaped bracket having extremities respectively mounted on said shafts pair for rotation about said second axis;

a further shaft mounted on said bracket, at about the middle thereof, for defining a third axis perpendicular to said second axis; said first, second and third axes intersecting at one point of intersection;

an arm member mounted, at about its middle, on said further shaft for rotation about said third axis, said arm member having two extremities;

an X-ray source mounted on one extremity of said member for emitting an X-ray beam, the central ray thereof transversing said intersection point;

an X-ray receiver for supplying a visible picture mounted on the other extremity of said arm member in radiation receiving relation relatively to said X-ray source;

a carrying member integral with said common structural support and including a straight portion parallel to said second axis;

a mounting member mounted on said straight portion for displacement therealong; and

means for supporting said patient movably, mounted on said mounting member, on the one hand, for rotation about a seas:

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1573571 *May 20, 1924Feb 16, 1926Ernst PohlTable for chi-ray transradiation
US2103693 *Oct 5, 1934Dec 28, 1937Ernst PohlRadiographic couch
US3449569 *Jul 22, 1966Jun 10, 1969Jose L Garcia OllerRadiological apparatus wherein the x-ray source is mounted for rotational and straight-line movement
US3500045 *Sep 20, 1966Mar 10, 1970Generay Gen RadiologicaTiltable x-ray table supporting an x-ray tube and detector for displacement and rotation in two directions relative to the table
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3833813 *Sep 25, 1972Sep 3, 1974Philips CorpDevice for examining a patient, in particular by means of x-rays
US3852611 *May 1, 1973Dec 3, 1974Radiologie Cie GleRadiodiagnostic apparatus including a pivotable x-ray table
US3908126 *Jan 2, 1974Sep 23, 1975Pennwalt Corp S S White DentalX-ray apparatus for providing panoramic radiographic projections
US3934140 *Oct 9, 1974Jan 20, 1976Establissements DutertreX-ray diagnostic apparatus in particular for examining the injured
US3952201 *Jul 17, 1974Apr 20, 1976Emi LimitedRadiography
US3965357 *Mar 1, 1974Jun 22, 1976Emi Patents LimitedApparatus for examining a body by means of penetrating radiation
US3973128 *Jul 31, 1974Aug 3, 1976Emi LimitedTomography
US3991317 *Feb 3, 1976Nov 9, 1976Siemens AktiengesellschaftX-ray examining apparatus
US4209706 *Jun 12, 1978Jun 24, 1980Varian Associates, Inc.Fluoroscopic apparatus mounting fixture
US4541108 *Jan 30, 1984Sep 10, 1985John K. GradyX-Ray apparatus with tilting table
US4639941 *May 14, 1984Jan 27, 1987Emi LimitedRadiography
US4646335 *Jan 31, 1985Feb 24, 1987Orion-YhtymaApparatus for X-ray photography of the area of the dentition and of the jaws
US4649560 *Jan 30, 1984Mar 10, 1987John K. GradyDigital X-ray stand
US4683581 *Jan 31, 1985Jul 28, 1987Orion-YhtymaApparatus for X-ray photography of the area of the dentition and of the jaws
US4705955 *Apr 2, 1985Nov 10, 1987Curt MileikowskyRadiation therapy for cancer patients
US4769828 *Oct 17, 1983Sep 6, 1988Emi LimitedRadiography
US4987585 *Jul 25, 1990Jan 22, 1991General Electric CompanyX-ray positioner for multi-axis profiling
US5042487 *Nov 13, 1989Aug 27, 1991Marquardt Mark RExamination unit including positionable patient chair, examination device and support system
US5052036 *Apr 2, 1990Sep 24, 1991Grady John KX-ray stand with laterally inclined rotation axis
US5287546 *Nov 16, 1992Feb 15, 1994Lunar CorporationPatient positioning apparatus for bone scanning
US5410584 *Apr 7, 1994Apr 25, 1995Siemens AktiengesellschaftApparatus for supporting a radiation transmitter
US6259762 *Aug 19, 1998Jul 10, 2001Deutsches Krebsforschungszentrum Stiftung Des Offentlichen RechtsRadiation system with several radiation sources directed to a control point
US6375355Mar 9, 2000Apr 23, 2002Joseph FortinMoveable table
US7315606Apr 18, 2005Jan 1, 2008Canon Kabushiki KaishaX-ray imaging apparatus and its control method
US8841619 *Jun 1, 2012Sep 23, 2014General Electric CompanyMethods and systems for positioning detectors for nuclear medicine imaging
US20050238141 *Apr 18, 2005Oct 27, 2005Canon Kabushiki KaishaX-ray imaging apparatus and its control method
US20130320234 *Jun 1, 2012Dec 5, 2013General Electric CompanyMethods and systems for positioning detectors for nuclear medicine imaging
CN100545745CApr 19, 2005Sep 30, 2009佳能株式会社X-ray imaging apparatus and its control method
CN103462631A *Sep 22, 2013Dec 25, 2013江苏美伦影像系统有限公司Multi-angle cone beam CT (Computed Tomography) imager
CN103462631B *Sep 22, 2013Oct 21, 2015江苏美伦影像系统有限公司多角度锥束ct成像仪
EP0011407A1 *Oct 26, 1979May 28, 1980Pfizer Inc.X-ray examination apparatus, particularly for X-ray photographs of the head
EP1588664A1 *Apr 15, 2005Oct 26, 2005Canon Kabushiki KaishaX-Ray imaging apparatus and its control method
WO1991007131A1 *Oct 16, 1990May 30, 1991Marquardt Mark RExamination unit including positionable patient chair, examination device and support system
Classifications
U.S. Classification378/179, 378/196, 378/178
International ClassificationA61B6/00, A61B6/04, H05G1/02, A61B6/02, A61B6/14
Cooperative ClassificationA61B6/501, A61B6/4441, A61B6/145
European ClassificationA61B6/50B, A61B6/44J2B, A61B6/14B