CN101339819A - Remote controllable collimator with four parts independently moving - Google Patents
Remote controllable collimator with four parts independently moving Download PDFInfo
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- CN101339819A CN101339819A CNA2007101184318A CN200710118431A CN101339819A CN 101339819 A CN101339819 A CN 101339819A CN A2007101184318 A CNA2007101184318 A CN A2007101184318A CN 200710118431 A CN200710118431 A CN 200710118431A CN 101339819 A CN101339819 A CN 101339819A
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Abstract
The invention relates to the technical field of a high-energy nondestructive test of radiography, industrial CT, van container/cargo inspection systems and the like and discloses a collimator which can remotely control four parts to independently move. The collimator comprises four parts which can independently move; each part consists of a collimation block, a fixing device, a driving device, an inhibiting device, a sensing device and a motor which are arranged in a collimator frame; meanwhile, each part further comprises a power supply device, a control device, a communication device, a remote-end controller and a zero collimator which cooperates with the power supply device, the control device, the communication device and the remote-end controller. The collimator of the invention can flexibly carry out the 2D definition of a radiation field, and can collimate the radiation field to various square pyramidal shapes which are suitable for the radiography or to a flat sector which is suitable for scanning imaging; the collimation block has a relatively great thickness and a specific shape and adopts a circular-arc orbit to lead to a rather clear boundary of the radiation field; meanwhile, the collimator can be provided with a remote control device and a display device to control the condition of the collimator at a far end.
Description
Technical field
The present invention relates to high energy technical field of nondestructive testing such as radiography, industry CT, van container/Cargo Inspection System, relate in particular to a kind of remote-controlled four part self-movement collimating apparatuss.
Background technology
With the high-energy ray source is the high energy Non-Destructive Testing field of radiation source, comprises radiography, industry CT, van container/Cargo Inspection System etc.The high-energy ray source is accelerator normally, and what the use of a small amount of system was also arranged is the high energy radioactive nuclide.The high energy Non-Destructive Testing comprises radiography, industry CT, van container/Cargo Inspection System etc., wherein radiography is to allow tested object expose a period of time in the radiation field in high-energy ray source, obtains the shapes/configurations information of object by the photosensitive device (X-ray film or X-ray imaging screen) of its backlight side; Industry CT is to allow tested object place between high-energy ray source and the detector, visit the transmitted intensity of getting by detector and utilize the Computer Processing imaging to obtain the structural information of object then, and can obtain very careful two dimension or the three-dimensional structure image of object by the multi-level radiant image of multi-angle; Van container/cargo detection system be tested object such as container, automobile, luggage parcel etc. by the passage between high-energy ray source and the detector, handle the last fluoroscopy images that generates object to be detected by Computer signal.In these high energy Non-Destructive Testings, all need to define, only utilize a part of ray wherein to carry out radiography or scanning imagery by the radiation field of collimating apparatus to the high-energy ray source.
The main part of collimating apparatus stops by X ray is had usually/material of absorption makes, by the certain structure design, can stop a part of X ray, and allow another part X ray pass through, to reach the purpose of collimation.For the X ray that needs stop, its blocking effect is by the material and the thickness decision of collimating apparatus.In different nondestructive detection systems, collimating apparatus is collimated into different shapes with X-ray beam, as needing usually in the radiography radiation field is collimated into square taper, in scanning imagery, usually need with radiation field collimate become to approach fan-shaped, in the anterior shaped design collimating apparatus of pressing detector usually of detector, to stop the X ray of scattering, allow detector only absorb the X ray that object is crossed in the forward direction transmission.Collimating apparatus has very significant effects to the photograph or the imaging effect of nondestructive detection system, is one of vitals in the nondestructive detection system.
In the existing technology, collimating apparatus has has the fixed block pattern of finedraw in the middle of making, open the fixed block pattern of oblong aperture perhaps, these collimator structures are simple, cost is low, but each collimating apparatus can only form a kind of fixing ray field, and can not adjust flexibly by the correlation field of line, and application conditions is very limited.
In the prior art, also there is collimating apparatus to make mobilizable structure, but the ray field can only be adjusted on the direction of a dimension, the collimating apparatus that a kind of CT of being used for system can adjust ray thickness is disclosed as patent US7031434B1, he utilizes the double-eccentric shaft column structure, when diaxon rotated, the gap of the two cylinders thickness of realizing the correlation field of line that changes was adjusted.In this structure, the border that limits the ray field is the tangent line of circle, collimating apparatus stops that the part of ray is by being thinned to thick gradually changing, the effect that stops ray also grows from weak to strong and gradually changes, make border, ray field transmitted intensity by by force to a little less than gradually change, cause the border of ray field that a fuzzy zone is arranged, influence the photograph or the image quality of system.The another kind of collimating apparatus that medical CT system can adjust ray thickness that is used for is disclosed as patent US6173039B1.They can only the correlation field of line realize the thickness adjustment on the dimension, can not realize two dimension adjustment.
But patent FR2864685A1 discloses a kind of radiography system correlation field of line that is used for carries out the collimating apparatus that two dimension is adjusted.He uses six flat boards, per three one group a direction is adjusted, and wherein two is a pair of, be installed on the axle, carry out relative motion, another piece is installed on another axle, can independently moving, these six flat boards are by the two dimension adjustment of the complicated incompatible realization of exercise group to radiation field.This patent has been used six flat boards, four axles, and structure is relatively complicated; The collimating apparatus main body is relatively thin flat board, can satisfy energy very low be the radiography system of radiation source with the X-ray machine, not being suitable for the very high accelerator of energy is the radiography system of radiation source.
Summary of the invention
The present invention proposes in order to address the above problem just.
The purpose of this invention is to provide a kind of four remote-controlled part self-movement collimating apparatuss, but all self-movements of this four part, wherein every part collimating apparatus include outer motor, gearing, the transmission joint of collimation piece, stationary installation, guide rail, leading screw and erecting frame shaped as frame structure that is installed in the erecting frame shaped as frame structure.
Wherein said stationary installation comprises transmission stationary installation and slip stationary installation, described collimation piece both sides are equipped with two pairs of slip stationary installations simultaneously, every pair of slip stationary installation closely contacts with a guide rail that is between them, can slide between slip stationary installation and the guide rail, in the collimation piece motion process because the effect of slip stationary installation with the orbiting motion of strictness along guide rail.
Described guide rail and leading screw be the edge of mounted in pairs in erecting frame shaped as frame structure respectively, described collimation piece is installed on the described leading screw by a pair of slip stationary installation of its both sides, described transmission stationary installation and leading screw closely cooperate, and leading screw bears the weight of collimation piece and drives the motion of collimation piece by the transmission stationary installation.Described slip stationary installation and collimation are a kind of flexible connections between the piece, make the collimation piece can have with respect to the slip stationary installation and a spot ofly move forward and backward and rotate.
The collimation piece respectively can be in the to-and-fro movement in the zone of upper and lower, left and right that is central point with the ray, thereby makes the motions of four collimation pieces make up and can define arbitrarily the ray open country in 2 dimensional region.The shape of guide rail is the arc that the center overlaps with the ray source point.
In some application scenario, can be according to the condition specific requirement, the center with beam is not the center, carries out defining (as Fig. 8 B, 8D) of ray open country
Described collimation piece is in motion process, and the angle point of the wild subtended angle of the ray of formation remains on ray source point O point place always, thereby the ray field that the collimation piece is defined keeps the edge of " precipitous " the most.
One of described leading screw is stretched out from the shaped as frame structure of erecting frame, each is to being separately installed with main driving wheel and from power wheel on the leading screw, motor, main driving wheel, from being provided with transmission joint (as belt pulley, chain etc.) between the power wheel, make their coordinations under certain conditions, driven by motor main driving wheel, main driving wheel drive from power wheel, and principal and subordinate's power wheel drives a pair of leading screw action synchronously, make the motion of collimation piece, realize scope adjustment the ray open country.
Mounting structure frame-saw shape structure also is equipped with position transducer outward, and described position transducer constitutes motion with master and slave power wheel or one and is connected, and can obtain the accurate action message of collimation piece from the motion of master and slave power wheel.
In addition, in the mounting structure frame-saw shape structure stop means is installed also, described stop means mounted in pairs is in erecting frame shaped as frame structure inboard, and the installation site can suitably be adjusted, when the collimation piece moved to the extreme position of system specialization, the collimation block edge touched stop means.
Erecting frame shaped as frame structure also is equipped with display device, manual switchgroup, control device, power interface, remote communication interface and control system outward.By described display device, information feedback be controlled and be obtained in real time to manual switchgroup and control device can to the motion of each collimation piece nearby.
Self-movement collimating apparatus of the present invention also is provided with remote communication interface and far-end control system, described remote communication interface is installed in outside the erecting frame shaped as frame structure, can carry out communication with far-end control system is connected, make the motion that respectively collimates piece to operate, and obtain the feedback of positional information in real time at far-end control system.Described control device has programmable logic controller spare, as PLC, can carry out logic synthesis under specific program to manual switchgroup, position sensor information, stop means information and judge.
It is the system of radiation source that but four part self-movement collimating apparatuss of the present invention are applied to the accelerator, by collimating apparatus radiation field is collimated into square taper or flat fan-shaped, can make system be used for radiography and scanning imagery simultaneously, has widened the range of application of system.Wherein but four part self-movement structures of collimating apparatus can be adjusted radiation field flexibly, have increased the range of application and the system flexibility of collimating apparatus greatly.Adopt the circular arc tracks, make that the border of radiation field is very obvious, help eliminating edge effect, improve photographic quality and image quality.
This collimating apparatus is equipped with telechiric device and display device, can carry out far-end control, makes that the use of system is convenient more.The more important thing is that in the high energy nondestructive detection system radiation source has usually that radioactivity is residual or have radioactivity for a long time, the far-end control function of collimating apparatus makes the staff away from radioactive source, and working environment is safer.
Description of drawings
Fig. 1 represents a kind of application radiography of the present invention and the concrete arrangement of the dual-purpose nondestructive detection system of CT;
But Fig. 2 represents a kind of four part self-movement collimating apparatuss of the present invention;
The positioned opposite relation of four collimation pieces in Fig. 3 presentation graphs 2;
The situation when Fig. 4 represents that but four part self-movement collimating apparatuss are only installed a part;
The horizontal cross-sectional schematic of Fig. 5 presentation graphs 2;
The vertical cross-sectional schematic of Fig. 6 presentation graphs 2;
Fig. 7 represents a kind of arrangement of control system;
Fig. 8 represents the wild example of several rays that collimating apparatus forms.
Among the figure: 1, accelerator; 2, shield assembly; 3, the 0th collimating apparatus; 4, collimating apparatus; 5, bundle is accused of in taper; 6, examined object body; 7, photosensitive device; 8, flat fan-ray beam; 9, back collimating apparatus; 10, detector; 11, signal Processing and imaging system; 12, far-end control system; 401, collimation piece; 402, slip stationary installation; 403, transmission stationary installation; 404, guide rail; 405, leading screw; 406, main driving wheel; 407, from power wheel; 408, motor; 409, stop means; 410, position transducer; 411, lever position indicator; 412, manual switchgroup; 413, control device; 414, power interface; 415, remote communication interface; 416, erecting frame; 417, erecting frame shaped as frame structure; 418, transmission joint.
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Fig. 1 represents a kind of application radiography of the present invention and the concrete arrangement of the dual-purpose nondestructive detection system of CT, this detection system is mainly by accelerator 1, shield assembly 2, the 0th collimating apparatus 3, collimating apparatus 4, cone beam 5, examined object body 6, photosensitive device 7, flat fan-ray beam 8, back collimating apparatus 9, compositions such as detector 10, signal Processing and imaging system 11 and far-end control system 12.
Wherein accelerator 1 is an x-ray source, producing one is the main X ray that distributes by 4 π angle solid spaces with the forward direction, shield assembly 2 stops side direction and back fall to useless X ray, to eliminate spuious X ray to detecting the influence of quality, the 0th collimating apparatus 3 X ray that forward direction is useful is limited in the wild scope of bigger taper ray.When system need work in the irradiation Photographing Mode, collimating apparatus 4 can be constrained to a cone beam 5 according to the scope that the shape or the surveyed area of examined object body is complementary with the X ray that comes out from the 0th collimating apparatus 3 according to the control adjustment of far-end control system 12, this cone beam 5 is passed examined object body 6, make photosensitive device 7 sensitization that are in examined object body 6 rear sides, thereby can on photosensitive device 7, obtain the internal information of examined object body.Back collimating apparatus 9, detector 10, signal Processing and imaging system 11 need not work under the irradiation Photographing Mode.When system need work in the CT pattern, collimating apparatus 4 can be collimated into the X ray that comes out from the 0th collimating apparatus one flat fan-ray beam 8 according to the requirement adjustment of control system, this cone beam is passed the examined object body, by the back collimating apparatus that only allows direct X ray of coming to pass through from the transmission of examined object body, enter detector, detector sends to signal Processing and imaging system with the information of the reflection examined object body structure of its acquisition, the final fine structure image that generates the examined object body in this system.Under the CT pattern, need not to place photosensitive device 7.
But Fig. 2 has represented a kind of four part self-movement collimating apparatuss of the present invention, mainly by erecting frame 416, erecting frame shaped as frame structure 417, be installed in 4 guide rails 404 of erecting frame shaped as frame structure 417 inboards, 8 rhizoid thick sticks 405,8 stop means 409, be installed in 8 transmission stationary installations 403 on the leading screw 405, by 4 fixing collimation pieces 401 of transmission stationary installation 403, mounted in pairs is in 16 slip stationary installations 402 of collimation piece side, be installed in 4 main driving wheels 406 of leading screw 405 outer ends and 4 from power wheel 407, be installed in 4 motors 408 in erecting frame shaped as frame structure 417 outsides, 4 position transducers 410, transmission joint 418, and be installed in 4 lever position indicators 411 on the erecting frame 416,4 manual switchgroups 412, control device 413, power interface 414, remote communication interface 415 compositions such as grade.Wherein motor, transmission joint, principal and subordinate's power wheel, leading screw, transmission stationary installation collimation piece have constituted a cover kinematic system; Guide rail, slip stationary installation constitute positioning system; Position transducer, stop means constitute motion feedback system; Lever position indicator, manual switchgroup, control device constitute local control system; Communication interface and far-end control device constitute telechirics.
Fig. 3 has represented the positioned opposite relation of four collimation pieces among Fig. 2.Collimation piece 401a can move up and down, and range of movement is up zone of ray center point; Collimation piece 401b can move up and down, and range of movement is that ray center point is toward lower area; These two collimation pieces have constituted regional up and down the defining in ray open country.Collimation piece 401c can side-to-side movement, and range of movement is the ray center point zone of turning right; Collimation piece 401d can side-to-side movement, and range of movement is the ray center point zone of turning left; These two collimation pieces have constituted defining zone about the ray open country.The motion combination of four collimation pieces just can be defined arbitrarily the ray open country in 2 dimensional region.
The situation when Fig. 4 has represented that but a kind of four part self-movement collimating apparatuss are only installed a part.Collimation piece 401a is fixed on a pair of leading screw 405a, the 405b by a pair of transmission stationary installation 403a, 403b, is to flexibly connect between collimation piece 401a and transmission stationary installation 403a, the 403b, allows relative front and back displacement and rotation.Collimation piece 401a is installed with two couples of slip stationary installation 402a, 402b, 402c, 402d, blocks two guide rail 404a, 404b respectively, makes that collimation piece 401a can only be along the orbiting motion of guide rail decision.Main driving wheel 406a is installed on the leading screw 405a, is equipped with from power wheel 407a on the leading screw 405b.Motor 408a is installed on the erecting frame 416, drive main driving wheel 406a by transmission joint 418a (as belt or chain), main driving wheel 406a is again by driving from power wheel 407a and position transducer 410a by transmission joint 418b (as belt or chain), principal and subordinate's power wheel drives leading screw 405a, 405b action synchronously, make collimation piece 401a rise or descend, realize scope adjustment the ray open country.
Situation when Fig. 5 has represented that Fig. 2 level is analysed and observe.The guide rail 404 of side-to-side movement collimation piece 401c, 401d is an arc, make and collimate in piece 401c, the 401d motion process, the angle point of its subtended angle remains on ray source point O point place always, the ray field that makes the collimation piece define like this keeps the edge of " precipitous " the most, improves photographic quality and image quality.
Situation when Fig. 6 has represented that Fig. 2 vertically analyses and observe.The guide rail 404 that collimates piece 401a, 401b that moves up and down is arc, makes that the angle point of its subtended angle remains on ray source point O point place always in collimation piece 401a, the 401b motion process.
Fig. 7 has represented a kind of arrangement of control system.The power supply of system is inserted by power interface 414, is connected with far-end control system 12 by remote communication interface 415, and far-end control device can be the opertaing devices that have man-machine interface able to programme such as PC, PLC, touch-screen.System can carry out work by the mode of this locality control and remote control.Local control mode is directly pressed manual switchgroup 412 by operating personnel, action naming is directly delivered in the control device 413, the far-end control mode is sent action command by operating personnel on far-end control system 12, send to control device 413 by remote communication interface 415.Control device 413 forms drive current drive motor 408 actions that act on motor by its inner PLC logic determines and motor-drive circuit plate with command conversion after receiving action command, and motor 408 drives collimation piece 401 and position transducer 410 actions simultaneously.The positional information that position transducer 410 will collimate piece 401 in real time feeds back to control device 413, and control device 413 is sent to lever position indicator 411 simultaneously by the positional information of judging and arrangement will collimate piece 401 and far-end control system 12 shows.When collimation piece 401 moves to extreme position, to touch stop means 409, stop means 409 arrives control device 413 with corresponding signal feedback, control device 413 judges and makes motor 408 to stop action, and collimation piece 401 position that whether reaches capacity also can be judged by position transducer 410 feedacks.
Fig. 8 has represented the wild example of several rays that collimating apparatus forms.(A) being is the rectangular field at center with the beam center O, (B) be the rectangular field of not ordering at O in the center, (C) be used for the horizontal slot open country of CT, (D) rectangular field of a quadrant fully relatively, wherein (B), (D) are in some application scenario, can be not the center according to the condition specific requirement, carry out defining of ray open country with the center of beam.
The typical workflow of the present invention is as follows:
Local control mode: operating personnel directly press manual switchgroup 412, and action naming is delivered in the control device 413 by manual switchgroup 412.Control device 413 forms drive current drive motor 408 actions that act on motor by its inner PLC logic determines and motor-drive circuit plate with command conversion after receiving action command, and motor 408 drives collimation piece 401 and position transducer 410 actions simultaneously.The positional information that position transducer 410 will collimate piece 401 in real time feeds back to control device 413, control device 413 is sent to lever position indicator 411 simultaneously by the positional information of judging and arrangement will collimate piece 401 and far-end control system 12 shows, but the duty of operator's real-time monitored system wherein.When collimation piece 401 moves to extreme position, to touch stop means 409, stop means 409 arrives control device 413 with corresponding signal feedback, control device 413 judges and makes motor 408 to stop action, and collimation piece 401 position that whether reaches capacity also can be judged by position transducer 410 feedacks.
The far-end control mode: operating personnel send action command on far-end control system 12, send to control device 413 by remote communication interface 415.Control device 413 forms drive current drive motor 408 actions that act on motor by its inner PLC logic determines and motor-drive circuit plate with command conversion after receiving action command, and motor 408 drives collimation piece 401 and position transducer 410 actions simultaneously.The positional information that position transducer 410 will collimate piece 401 in real time feeds back to control device 413, and control device 413 is sent to lever position indicator 411 simultaneously by the positional information of judging and arrangement will collimate piece 401 and far-end control system 12 shows.But the duty of operator's real-time monitored system.When collimation piece 401 moves to extreme position, to touch stop means 409, stop means 409 arrives control device 413 with corresponding signal feedback, control device 413 judges and makes motor 408 to stop action, and collimation piece 401 position that whether reaches capacity also can be judged by position transducer 410 feedacks.
Though the present invention explains in conjunction with an embodiment; but those skilled in the art can be to wherein some feature appropriate change or apply it to other field solving the problem of radiography aspect in addition, so all relevant expansions of carrying out on the basis of present embodiment of those skilled in the art and use the protection domain that all should fall into the application.
Claims (15)
1, a kind of four remote-controlled part self-movement collimating apparatuss, but it is characterized in that all self-movements of this four part, wherein every part collimating apparatus includes outer motor, gearing, the transmission joint of collimation piece, stationary installation, guide rail, leading screw and erecting frame shaped as frame structure that is installed in the erecting frame shaped as frame structure.
2, four remote-controlled part self-movement collimating apparatuss as claimed in claim 1, it is characterized in that described stationary installation comprises transmission stationary installation and slip stationary installation, described collimation piece both sides are equipped with two pairs of slip stationary installations simultaneously, every pair of slip stationary installation closely contacts with a guide rail that is between them, can slide between slip stationary installation and the guide rail, in the collimation piece motion process because the effect of slip stationary installation with the orbiting motion of strictness along guide rail.
3, four remote-controlled part self-movement collimating apparatuss as claimed in claim 2, it is characterized in that described guide rail and the leading screw edge of mounted in pairs in erecting frame shaped as frame structure respectively, described collimation piece is installed on the described leading screw by a pair of slip stationary installation of its both sides, described transmission stationary installation and leading screw closely cooperate, and leading screw bears the weight of collimation piece and drives the motion of collimation piece by the transmission stationary installation.
4, four remote-controlled part self-movement collimating apparatuss as claimed in claim 3 is characterized in that described slip stationary installation and collimation are a kind of flexible connections between the piece, make the collimation piece can have with respect to the slip stationary installation and a spot ofly move forward and backward and rotate.
5, four remote-controlled part self-movement collimating apparatuss as claimed in claim 1, it is characterized in that described collimation piece respectively can be in the to-and-fro movement in the zone of upper and lower, left and right that is central point with the ray, thereby make the motions of four collimation pieces make up and in 2 dimensional region, to define arbitrarily the ray open country.
6, four remote-controlled part self-movement collimating apparatuss as claimed in claim 1 is characterized in that described collimation piece displacement general is not the center with the center of beam, carries out defining of eccentric ray open country.
7, as claim 1 or 5 described four remote-controlled part self-movement collimating apparatuss, the shape that it is characterized in that described guide rail is the arc that the center overlaps with the ray source point.
8, as each described four remote-controlled part self-movement collimating apparatuss in the claim 1,2 or 7, it is characterized in that described collimation piece is in motion process, the angle point of the wild subtended angle of the ray that constitutes remains on ray source point O point place always, thereby the ray field that the collimation piece is defined keeps the edge of " precipitous " the most.
9, as claim 1 or 3 described four remote-controlled part self-movement collimating apparatuss, one that it is characterized in that described leading screw is stretched out from the shaped as frame structure of erecting frame, each is to being separately installed with main driving wheel and from power wheel on the leading screw, motor, main driving wheel, be provided with transmission joint between the power wheel, make their coordinations under certain conditions, the driven by motor main driving wheel, main driving wheel drives from power wheel, principal and subordinate's power wheel drives a pair of leading screw action synchronously, make the motion of collimation piece, realize scope adjustment the ray open country.
10, four remote-controlled part self-movement collimating apparatuss as claimed in claim 9, it is characterized in that mounting structure frame-saw shape structure also is equipped with position transducer outward, described position transducer constitutes motion with master and slave power wheel or one and is connected, and can obtain the accurate action message of collimation piece from the motion of master and slave power wheel.
11, four remote-controlled part self-movement collimating apparatuss as claimed in claim 1, it is characterized in that in the mounting structure frame-saw shape structure stop means being installed also, described stop means mounted in pairs is in erecting frame shaped as frame structure inboard, when the collimation piece moved to the extreme position of system specialization, the collimation block edge touched stop means.
12, four remote-controlled part self-movement collimating apparatuss as claimed in claim 1 is characterized in that erecting frame shaped as frame structure also is equipped with display device, manual switchgroup, control device, power interface, remote communication interface and control system outward.
13, four remote-controlled part self-movement collimating apparatuss as claimed in claim 12 is characterized in that by described display device, and information feedback be controlled and be obtained in real time to manual switchgroup and control device can to the motion of each collimation piece nearby.
14, as claim 1 or 12 described four remote-controlled part self-movement collimating apparatuss, it is characterized in that also being provided with remote communication interface and far-end control system, described remote communication interface is installed in outside the erecting frame shaped as frame structure, can carry out communication with far-end control system is connected, make the motion that respectively collimates piece to operate, and obtain the feedback of positional information in real time at far-end control system.
15, four remote-controlled part self-movement collimating apparatuss as claimed in claim 12, it is characterized in that described control device has programmable logic controller spare, can under specific program, carry out logic synthesis to manual switchgroup, position sensor information, stop means information and judge.
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| CN108020569A (en) * | 2018-01-18 | 2018-05-11 | 中国工程物理研究院应用电子学研究所 | A kind of collimator apparatus and the CT machines comprising the device |
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| CN1178711A (en) * | 1997-09-17 | 1998-04-15 | 戴建荣 | Use of independent collimator in adaptive radiotherapy |
| CN2514851Y (en) * | 2001-10-19 | 2002-10-09 | 深圳市一体智能技术有限公司 | Composite moving multivane collimator |
| CN1569275A (en) * | 2004-04-29 | 2005-01-26 | 杭州华源伽玛医疗设备投资有限公司 | Gamma ray radiation device |
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| CN105852901A (en) * | 2016-04-15 | 2016-08-17 | 沈阳东软医疗系统有限公司 | Electron linear accelerator, beam limiting device, lead blade driving device and driving component |
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| CN107132239A (en) * | 2017-05-25 | 2017-09-05 | 上海联影医疗科技有限公司 | The colimated light system and moving cell positional precision monitoring method of a kind of Medical Devices |
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| CN108020569B (en) * | 2018-01-18 | 2023-11-21 | 中国工程物理研究院应用电子学研究所 | Collimation device and CT machine comprising same |
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