CN202802548U - Grid field grid collimator - Google Patents
Grid field grid collimator Download PDFInfo
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- CN202802548U CN202802548U CN 201220290308 CN201220290308U CN202802548U CN 202802548 U CN202802548 U CN 202802548U CN 201220290308 CN201220290308 CN 201220290308 CN 201220290308 U CN201220290308 U CN 201220290308U CN 202802548 U CN202802548 U CN 202802548U
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Abstract
The utility model provides a grid field grid collimator. The grid field grid collimator comprises a first collimator and a second collimator which are sequentially arranged along the irradiation direction of a point light source, a shielding column arranged between the first collimator and the second collimator, and a driving system for driving the shielding column, wherein the first collimator and the second collimator respectively are grid collimators with N strip light holes; the shielding column is vertically arranged between the first collimator and the second collimator, n shielding columns are respectively arranged below each strip light hole of the grid collimator and wholly formed into a trapezoid; the driving system respectively controls the swing of each shielding column between right below the grid of the grid collimator and right below the adjacent grid. The grid field grid intensity-modulation collimator is suitable for various types of linear accelerators by the external hanging type design of an adaption rack connected with the heads of the accelerators.
Description
Technical field
This utility model relates to the collimator field of using in the tumour radiotherapy process in the medical apparatus and instruments, particularly a kind of field,grid grid collimator.
Background technology
Collimator is the radiation head building block of medical accelerator.The parts that produce definite shape profile radiation field size are called colimated light system, and the parts of generation rule shape profile radiation field size are called regular wild colimated light system, and regular open country refers to that profile is square, rectangle or the circular radiation field size of variable size.Conventional planning treatment need to produce the rule of X-radiation wild leaving a distance, X-radiation source, in order to the tumor of a certain size and shape in the patient body is carried out radiotherapy.The profile of radiation field size has been stipulated the scope of radiation, if the scope of machine appointment is inconsistent with the scope of actual irradiation, the part that the target area is had is missed irradiation, and serious is to shine near critical organ.
The regular X-radiation colimated light system of medical electronic linear accelerator is comprised of example of primary collimator, secondary collimator and additional collimator.
Example of primary collimator (Primary Collimator) is positioned at electronics extraction window below, be the fixing collimator with round taper hole, the effect of example of primary collimator has two aspects, it has determined the wild scope of greatest irradiation that this accelerator can provide on the one hand, on the other hand, it has stopped the wild extraneous primary radiation that is produced by radiation source of greatest irradiation, be that to need the example of primary collimator semi-cone angle be 14 ° for the circular radiation field size of 50cm for obtaining apart from source 100cm place diameter for example, this border circular areas is called the M zone, simultaneously on the example of primary collimator hole also the diameter restrictions of radiation source at diameter 4mm with interior (actual diameter is in 3mm).In order to reduce the radiation head height, example of primary collimator adopts high atomic number material such as tungsten to make, and also makes with depleted nuclear fuel in early days, and its height should be able to decay to 10-3 with primary radiation, or three tenth-value layers thick (Tenth Value Layer TVL).Example of primary collimator is shared by electron radiation and X-radiation.
Secondary collimator (Seconday Co11imator) but by the rectangular collimator of two pairs of foldings up and down, being commonly called as up and down, diaphragm (Diap bragm) forms, material is made by tungsten, lead or depleted nuclear fuel, can form square or rectangular radiation is wild by the open and close movement of two pairs of rectangular collimator up and down.Symmetry according to open and close movement is divided into again:
A. two pairs of rectangular collimator are all done symmetrical open and close movement about this system of symmetrical colimated light system.In order to reduce X ray at the scattering of collimator sidewall and the transmission penumbra of collimator edge part, the medial surface of rectangular collimator should be tangent with the transmit direction of ray.The thickness of rectangular collimator is enough thick, meets national standard to guarantee the transmission amount that the x ray passes collimator.This transmission amount should be less than 0.5% of central ray intensity.
B. asymmetric colimated light system is in clinical practice, along with height is treated the requirement of precision and the expansion of application, developed asymmetric colimated light system (or being called independent colimated light system), this system still keeps a pair of rectangular collimator and does symmetrical motion, be that symmetrical open and close movement is done at relative center, and asymmetrical opening or closure done at a pair of (generally being that the below is a pair of) relative center of rectangular collimator in addition, and the rectangular collimator of asymmetrical movement can pass over each other central shaft to allocinesi one segment distance (10-20cm).When a side rectangular collimator is positioned at the position of ray center axle just. form thus the tangent line launched field, be used for the linking irradiation of coplanar and non-coplanar adjacent launched field, the tangential field irradiation of breast carcinoma and the tangential irradiation of rotation therapy.
Additional header collimator: the circular collimator that when utilizing medical electronic linear accelerator to carry out head stereoscopic directional emittance surgery or stereotactic radiotherapy, needs below radiation head, to install additional different size.
To the collimation of electron radiation except utilizing the primary and secondary collimator; below radiation head, be equipped with electronics beam-defining clipper (Aplicator); its main function is the scope that limits electron radiation, in order to protect the normal structure outside the target area and make critical organ avoid irradiation.The two shielding posts that claim of electronics beam-defining clipper.The shielding post be shaped as taper or barrel-shaped.Can fix, also adjustable.
Radiation therapy technology has entered into the Intensity Modulation Radiated Therapy (IMRT) stage.Present accent strong method is many based on the suitable shape of tradition and intensity-modulated collimator, transfer strong, sliding window formula to transfer strong and arcing is transferred strong as the multi-leaf optical grating mothers and sons are wild, the Tomotherapy of tomography grating and spiral go forward one by one transfer strong etc., also inquiring into the grid type accent by force in the industry, be about to launched field and be divided into some little basic accent strong units with grid, basic accent strong unit is carried out respectively dose-modulated, and the density of grid determines to transfer strong precision, and once irradiating transfers the number of strong unit to determine to transfer strong efficient substantially.As illumination efficiency is too low one by one to basic accent strong unit with accelerator self rectangle launched field collimator, NOMOS company filled with mercury formula checkerboard type collimator can only be done the two dimension irradiation, and Tomotherapy also belongs to grid and transfers strong a kind ofly, but efficient is not high.
Summary of the invention
This utility model is to provide a kind of grid type of realizing to transfer strong collimator, is guaranteeing to have the potent rate of higher accent under the high-precision prerequisite.
This utility model is that the technical scheme that its technical purpose of realization adopts is: a kind of field,grid grid collimator is included in first collimator and the second collimator, the shielding post that arranges that sets gradually on the point source direction of illumination, the drive system that drives described shielding post between described first collimator and the second collimator;
Described first collimator and the second collimator are respectively the grid collimator with N bar shaped unthreaded hole;
Described shielding post vertically is arranged between described first collimator and the second collimator, respectively is provided with n root shielding post under each bar shaped unthreaded hole of described grid collimator, and described shielding post integral body in echelon;
Described drive system control respectively each shielding post under the grid of described grid collimator and adjacent basic under between swing.
Further, in the above-mentioned field,grid grid collimator: in the described grid collimator, N uniform the setting on the high desnity metal material matrix of bar shaped unthreaded hole; All strip light hole lengths are identical with width, under the irradiation of described point source, waiting central plane to form the bar shaped launched field, and behind described grid collimator Rotate 180 °, the new bar shaped launched field that forms overlaps with shade between the original bar shaped launched field.Below described the second collimator, be provided with equalizer.
Further, in the above-mentioned field,grid grid collimator: the length of side of the cross section of described shielding post and described bar shaped unthreaded hole parallel direction is that the 1/n of described strip light hole length is suitable, and is suitable with the width of the length of side of described bar shaped unthreaded hole vertical direction and bar shaped unthreaded hole.
Further, in the above-mentioned field,grid grid collimator: in the described shielding post, respectively be provided with a strip through-hole in two sidewall middle parts parallel with the bar shaped unthreaded hole, each arranges and bar shaped unthreaded hole parallel striped breach in shielding both sides, post two ends.
Further, in the above-mentioned field,grid grid collimator: the sidewall at described shielding post is rough and uneven in surface.
Further, in the above-mentioned field,grid grid collimator: described driving mechanism comprises axis of guide assembly), electromagnetic driver, guide post and link stopper;
Described axis of guide assembly is corresponding with every shielding post respectively, comprises first axis of guide, second axis of guide, transverse link; Be connected with frame by rack-mounted the first linear bearing in the middle of described first axis of guide; One end of described first axis of guide be installed in described shielding post in the middle of strip through-hole in rotating shaft be connected by swivel bearing; The other end of described first axis of guide is connected with an end of described transverse link by soft connecting mechanism, one end of the other end of described transverse link and described second axis of guide is affixed, described second axis of guide utilizes two the second linear bearings to be installed on the described frame, and described second axis of guide is connected with described electromagnetic driver in the middle of two the second linear bearings;
The direction of described guide post is substantially vertical with the bar shaped unthreaded hole, comprises n to top guide bar and the lower guide rod of paired appearance, fixes by described bar shaped link stopper in the top and bottom of described shielding post respectively.
Based on technique scheme, each angle during corresponding multi-angle irradiation transfers intense irradiation to carry out at twice:
For the first time irradiation: under the control of accelerator control system, the grid collimator is followed accelerator head and is in one of two position changeables, and control accelerator example of primary collimator namely a kind of rectangle launched field collimator it is overlapped at the launched field that waits central plane and field,grid grid intensity-modulated collimator maximum launched field, field,grid grid intensity-modulated collimator control system is controlled whole N * n shielding posts and all is in its initial position, this process is called initialization, after this, the accelerator point source goes out bundle, at this moment there is not light beam to shine maximum launched field place through field,grid grid intensity-modulated collimator, next, according to the treatment plan requirement, under the control of collimator control system, make those shielding posts that are in simultaneously the shielding post rectangle projected correspondence in bar shaped launched field and the tumor target area of irradiation leave its initial position, at this moment corresponding these shielding post initial position view fields in maximum launched field can receive light beam irradiates dosage, according to transferring the intense irradiation treatment plan, each transfers the strong unit radioactive dose different substantially in the launched field, the aforementioned shielding post that leaves initial position of collimator control system control is got back to initial position successively, again stop that light beam irradiates arrives its projection place, when last shielding post is got back to its initial position, for the first time irradiation is finished, and accelerator stops bright dipping.
For the second time irradiation: accelerator control system control accelerator head drives the grid collimator and realizes 180 ° of rotations, repeats said process.
This utility model provides a kind of grid type grid intensity-modulated collimator after adopting such scheme, and when transferring intense irradiation, wild of the accent intense irradiation of corresponding each irradiating angle needs twice irradiation, has the potent rate of higher accent.
The trapezoidal shielding post design that this utility model adopts, swing transposition design take point source as the center of circle and driver place the design outside the launched field, make trapezoidal shielding post can do very littlely with the cross section of waiting central plane to parallel, it is also very little in the projection that waits central plane, has higher precision, i.e. corresponding specific maximum launched field, the number of N and n can be very large, maximum launched field such as corresponding 200mm * 200mm and 100mm * 100mm, N and n can accomplish that all the basic accent strong unit of 10 and 20 correspondences is respectively 10mm * 10mm and 5mm * 5mm, the former can tackle the intensity modulated therapy of most tumors, and the latter can tackle the treatment of the meticulous position of head tumor.
This utility model adopts axis of guide component technology to enlarge the space of arranging of driver, has accomplished that the densely arranged shielding post of large-sized driver and small size is corresponding one by one.
The dull and stereotyped expansion device that this utility model adopts can be repaired first axis of guide, bar shaped block and guide post etc. has the object of projection to the destruction of ray flatteness in maximum launched field.
One group of N * n shielding post that this utility model adopts places two designs between the grid collimator along point source to shining center line connecting direction, when the ray that the point source that in fact effectively reduce has certain physical width sends was in initial position at the shielding post, companion shadow is penetrated and penetrated to the bar shaped unthreaded hole with the leakage of shielding post side junction.
The grid collimator that this utility model adopts has been saved cover grid collimator self rotary drive mechanism with the design of frame and accelerator head Rotate 180 °, makes body weight lighter.
The external hanging type that the field,grid grid intensity-modulated collimator that this utility model adopts is connected with accelerator head through adapter rack designs the linear accelerator of applicable Multiple Type.
Below with reference to drawings and Examples, this utility model is described in detail.
Description of drawings
Fig. 1 is this utility model grid type launched field grid intensity-modulated collimator explosive view.
Fig. 2 is that two groups of N bar shaped launched fields are risked maximum launched field sketch map.
Fig. 3 is that the maximum launched field sketch map of grid type is risked in 2 * N * n shielding post projection.
Fig. 4 is shielding post sketch map.
Fig. 5 is shielding post swing drive structure sketch map.
Fig. 6 is a kind of field,grid grid intensity-modulated collimator scheme of installation on accelerator.
The specific embodiment
In the grid collimator 9, N bar shaped unthreaded hole 4 uniform settings on the high desnity metal material matrix; All bar shaped unthreaded hole 4 length are identical with width, under the irradiation of point source 1, waiting central plane 5 to form bar shaped launched field 7, behind grid collimator 9 Rotate 180s °, the new bar shaped launched field 7 that forms overlaps with shade between the original bar shaped launched field 7, as shown in Figure 2, the formed maximum launched field 18 of grating before and after behind the Rotate 180 ° and example of primary collimator 6 it waiting the elementary launched field 8 of central plane 5 formation substantially to overlap.N is generally 10 at present, also other numeral can be arranged as required.
Two grid collimators 9 have been saved cover grid collimator self rotary drive mechanism with the design of frame 15 and accelerator head 17 Rotate 180s ° in the present embodiment, make body weight lighter.
Be provided with equalizer 13 below the grid collimator 9 below.
Axis of guide assembly 123 is corresponding with every shielding post 11 respectively, comprises first axis of guide 1231, second axis of guide 1235, transverse link 1233; Be connected with frame 15 by the first linear bearing 1232 that is installed on the frame 15 in the middle of first axis of guide 1231; One end of first axis of guide 1231 be installed in shielding post 11 in the middle of strip through-hole 111 in rotating shaft 121 be connected by swivel bearing 122; The other end of first axis of guide 1231 is connected with an end of transverse link 1233 by soft connecting mechanism 1234, one end of the other end of transverse link 1233 and second axis of guide 1235 is affixed, second axis of guide 1235 utilizes two the second linear bearings 1236 to be installed on the frame 15, and second axis of guide 1235 is connected with described electromagnetic driver 124 in the middle of two the second linear bearings 1236; The direction of guide post 125 is substantially vertical with bar shaped unthreaded hole 4, comprises n to top guide bar and the lower guide rod of paired appearance, fixes by described bar shaped link stopper 126 in the top and bottom of described shielding post 11 respectively.
In the present embodiment, field,grid grid intensity-modulated collimator comprises two grid collimators 9 of being made by the high desnity metal material, the line 3 direction longitudinal separations of these two grid collimators 9 along medical electronic linear accelerator point source 1 to point source rotary irradiation center 2 are arranged, one group of N * n root shielding post 11 is set between two grid collimators 9, as shown in Figure 1, grid collimator 9 and 11 combinations of shielding post all are installed in frame 15 central authorities.
Be processed with N four medial walls on the base material of the high desnity metal material of each grid collimator 9 and send the parallel bar shaped unthreaded hole 4 of ray with point source 1, the N number determines as required, and is present, generally have 10, perhaps other number, below take 10 as example.Take point source 1 as viewpoint in that it is waiting the elementary launched field 8 of central plane 5 formation substantially to overlap to shining the perpendicular example of primary collimator that waits central plane 5 that comprises irradiation center 2 of the line of centres 36 with point source, and it is individual isometric to form N, be parallel to each other, the bar shaped launched field 7 of minor face alignment, self can point source be axle center Rotate 180 ° to the line 3 that shines the center, waiting central plane 5 places to form other N bar shaped launched field 7, it is the twice of N bar shaped launched field 7 gross areas that N the bar shaped launched field 7 long limit parallel short sides alignment that form before the rotation are spaced the synthetic continuous gross area, form maximum launched field 18, as shown in Figure 2.
Make global shape to be trapezoidal shielding post 11 be that the every row n of one group of N row is individual by the high desnity metal material and place between two grid collimators 9 to shining the line of centres 3 directions along point source, N row's orientation is parallel with the minor face of bar shaped launched field 7, the orientation that every row are n is parallel with bar shaped launched field 7 long limits, it is parallel that each shielding post 11 4 sidewall and point source 1 send ray, take point source 1 as viewpoint in the projection 10 that waits central plane 5 places as shown in Figure 3, projection 10 is that a limit equates with bar shaped launched field 7 minor face parallel lengths, another limit and bar shaped launched field 7 long limit parallel lengths are the 1/n of bar shaped launched field 7 long edge lengths, self can point source 1 between two positions, swing along bar shaped launched field 7 short side directions for the center of circle, when being in a position, shielding post 11 all is in the bar shaped launched field 7 in the projection 10 that waits central plane 5 places, when shielding post 11 was in another position, shielding post 11 left the rectangle projection 10 of 7 two positions of bar shaped launched field fully in the projection 10 that waits central plane 5 places.N in the present embodiment * 11 on post of n shielding can drive separately, the driving mechanism 12 that each shielding post 11 swings between these two positions.
The control system of present embodiment can independently be controlled N * n driving mechanism 12, each driving mechanism 12 can be controlled separately a shielding post 11, make shielding post 11 be in two positions, the position of first fully shading light line, another position is the position of not blocking fully, can swing between these two positions.
In the present embodiment, shielding post 11 integral body are trapezoidal, as shown in Figure 4, be processed with a strip through-hole 111 two sidewall middle parts parallel with bar shaped launched field 7 long limits, the sidewall parallel with bar shaped launched field 7 long limits at shielding post 11 two ends is processed with two bar v notch vs 112, the sidewall parallel with bar shaped launched field 7 minor faces is processed with two bar v notch vs 112 at shielding post 11 two ends, be processed with the shielding post 11 of strip through-hole 111, four bar v notch vs 1, the effective shielding thickness that sends directions of rays along some light 1 need satisfy the control requirement of radiant transmittance.
Axis of guide assembly 123 comprises first axis of guide 1231, two the first linear bearings 1232 at regular intervals, transverse link 1233, soft connecting mechanism 1234, second axis of guide 1235, two the second linear bearings 1236 at regular intervals, wherein first axis of guide 1231 links to each other with rotating shaft 121 through swivel bearing 122, passing two the first linear bearings 1232 that are installed on the frame 15 is connected with the soft connecting mechanism 1234 of processing at transverse link 1,233 one ends, the other end of transverse link 1234 with pass two second axis of guides 1235 that are installed in the second linear bearing 1236 on the frame 15 and be connected, second axis of guide 1235 is connected with linear electromagnetic driver 124 on being installed in frame 15, wherein first axis of guide 1232 and second axis of guide, 1235 axis parallels, axial line staggers.As shown in Figure 5.
Two each be processed with the grid collimator 9 that four medial walls of N and point source send the parallel bar shaped unthreaded hole 4 of ray, the width of its bar shaped unthreaded hole 4 can suitably be finely tuned, with reduce or remove that in fact theoretic point source 1 still has certain physical width and after grid collimator spin twice irradiation in 180 ° of front and back that bring how much companion shadows of bar shaped launched field 7 junctions on the impact of maximum launched field dosage flatteness.
Every row n four sidewalls of N row send the parallel trapezoidal shielding post 11 of ray with point source 1, wherein each shielding post 11 two sidewall parallel with bar shaped launched field 7 minor faces can be processed into more shallow convex-concave structure 115, with reduce or eliminate theoretic point source 1 in fact to still have certain physical width and the geometry companion shadows of n shielding post of every row rectangle projection 10 junctions in bar shaped launched field 7 of bringing on the impact of maximum launched field dosage expansion.
Based on technique scheme, the strong launched field of the accent of each angle just carries out at twice during corresponding multi-angle irradiation:
For the first time irradiation: under the control of accelerator control system, the grid collimator is followed accelerator head and is in one of two position changeables, and the rectangle launched field collimator of control accelerator self makes it overlap at the maximum launched field of the launched field that waits central plane 5 and field,grid grid intensity-modulated collimator, field,grid grid intensity-modulated collimator control system is controlled whole N * n shielding posts and all is in its initial position, this process is called initialization, after this, the accelerator point source goes out bundle, at this moment there is not light beam to shine maximum launched field place through field,grid grid intensity-modulated collimator, next, according to the treatment plan requirement, under the control of collimator control system, make those shielding posts that are in simultaneously the shielding post rectangle projected correspondence in bar shaped launched field and the tumor target area of irradiation leave its initial position, at this moment corresponding these shielding post initial position view fields in maximum launched field can receive light beam irradiates dosage, according to transferring the intense irradiation treatment plan, each transfers the strong unit radioactive dose different substantially in the launched field, the aforementioned shielding post that leaves initial position of collimator control system control is got back to initial position successively, again stop that light beam irradiates arrives its projection place, when last shielding post is got back to its initial position, for the first time irradiation is finished, and accelerator stops bright dipping.
For the second time irradiation: accelerator control system control accelerator head drives the grid collimator and realizes 180 ° of rotations, repeats said process.
Claims (7)
1. a field,grid grid collimator is included in first collimator and the second collimator, the shielding post that arranges that sets gradually on the point source direction of illumination, the drive system that drives described shielding post between described first collimator and the second collimator; It is characterized in that:
Described first collimator and the second collimator are respectively the grid collimator (9) with N bar shaped unthreaded hole (4);
Described shielding post (11) vertically is arranged between described first collimator and the second collimator, respectively is provided with n root shielding post under each bar shaped unthreaded hole (4) of described grid collimator (9), and described shielding post (11) integral body in echelon;
Described drive system (12) control respectively each shielding post (11) under the grid of described grid collimator (9) and adjacent basic under between swing.
2. field,grid grid collimator according to claim 1, it is characterized in that: in the described grid collimator (9), N bar shaped unthreaded hole (4) is uniform to be arranged on the high desnity metal material matrix; All bar shaped unthreaded hole (4) length is identical with width, under the irradiation of described point source (1), waiting central plane (5) to form bar shaped launched field (7), behind described grid collimator (9) Rotate 180 °, the new bar shaped launched field (7) that forms overlaps with shade between the original bar shaped launched field (7).
3. field,grid grid collimator according to claim 2 is characterized in that: be provided with equalizer below described the second collimator.
4. field,grid grid collimator according to claim 1, it is characterized in that: the length of side of the cross section of described shielding post (11) and described bar shaped unthreaded hole (4) parallel direction is that the 1/n of described bar shaped unthreaded hole (4) length is suitable, and is suitable with the width of the length of side of described bar shaped unthreaded hole (4) vertical direction and bar shaped unthreaded hole (4).
5. field,grid grid collimator according to claim 4, it is characterized in that: in the described shielding post (11), respectively be provided with a strip through-hole (111) in two sidewall middle parts parallel with bar shaped unthreaded hole (4), each arranges and bar shaped unthreaded hole (4) parallel striped breach (112) in shielding post (11) both sides, two ends.
6. field,grid grid collimator according to claim 4, it is characterized in that: the sidewall at described shielding post (11) is rough and uneven in surface.
7. field,grid grid collimator according to claim 5, it is characterized in that: described driving mechanism (12) comprises axis of guide assembly (123), electromagnetic driver (124), guide post (125) and link stopper (126);
Described axis of guide assembly (123) is corresponding with every shielding post (11) respectively, comprises first axis of guide (1231), second axis of guide (1235), transverse link (1233); Be connected with frame (15) by the first linear bearing (1232) that is installed on the frame (15) in the middle of described first axis of guide (1231); One end of described first axis of guide (1231) is connected by swivel bearing (122) with rotating shaft (121) in the strip through-hole (111) that is installed in the middle of the described shielding post (11); The other end of described first axis of guide (1231) is connected with an end of described transverse link (1233) by soft connecting mechanism (1234), one end of the other end of described transverse link (1233) and described second axis of guide (1235) is affixed, described second axis of guide (1235) utilizes two the second linear bearings (1236) to be installed on the described frame (15), and described second axis of guide (1235) is connected with described electromagnetic driver (124) in the middle of two the second linear bearings (1236);
The direction of described guide post (125) is substantially vertical with bar shaped unthreaded hole (4), comprises n to top guide bar and the lower guide rod of paired appearance, and is fixing by described bar shaped link stopper (126) in the top and bottom of described shielding post (11) respectively.
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| CN106226916A (en) * | 2016-07-26 | 2016-12-14 | 中国科学院高能物理研究所 | Optics collimator and processing method thereof |
| CN108031015A (en) * | 2017-12-19 | 2018-05-15 | 连卫东 | A kind of multilayer multi-blade collimator |
| CN108042151A (en) * | 2017-12-21 | 2018-05-18 | 上海六晶科技股份有限公司 | A kind of Medical Imaging System anti-scatter-grid device and preparation method thereof |
| CN109273131A (en) * | 2018-10-31 | 2019-01-25 | 同方威视技术股份有限公司 | Collimator assembly and ray detector |
| CN110721417A (en) * | 2019-10-18 | 2020-01-24 | 上海联影医疗科技有限公司 | Multi-leaf grating control system, method, device and storage medium |
| CN111617393A (en) * | 2020-06-19 | 2020-09-04 | 新里程医用加速器(无锡)有限公司 | Beam limiting device, multi-leaf grating and radiotherapy equipment |
| CN112402814A (en) * | 2020-11-12 | 2021-02-26 | 中国人民解放军海军军医大学 | Fixed shielding device and method for local irradiation of batch animal ionizing radiation with adjustable target area |
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| CN113663230A (en) * | 2021-07-27 | 2021-11-19 | 上海联影医疗科技股份有限公司 | Collimator and treatment head with same |
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- 2012-06-19 CN CN 201220290308 patent/CN202802548U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106226916A (en) * | 2016-07-26 | 2016-12-14 | 中国科学院高能物理研究所 | Optics collimator and processing method thereof |
| CN108031015A (en) * | 2017-12-19 | 2018-05-15 | 连卫东 | A kind of multilayer multi-blade collimator |
| CN108042151A (en) * | 2017-12-21 | 2018-05-18 | 上海六晶科技股份有限公司 | A kind of Medical Imaging System anti-scatter-grid device and preparation method thereof |
| CN108042151B (en) * | 2017-12-21 | 2024-04-30 | 上海六晶科技股份有限公司 | Preparation method of anti-scattering grid device for medical imaging system |
| CN109273131A (en) * | 2018-10-31 | 2019-01-25 | 同方威视技术股份有限公司 | Collimator assembly and ray detector |
| CN110721417A (en) * | 2019-10-18 | 2020-01-24 | 上海联影医疗科技有限公司 | Multi-leaf grating control system, method, device and storage medium |
| CN110721417B (en) * | 2019-10-18 | 2021-11-09 | 上海联影医疗科技股份有限公司 | Multi-leaf grating control system, method, device and storage medium |
| US11445987B2 (en) * | 2020-03-30 | 2022-09-20 | Neusoft Medical Systems Co., Ltd. | X-ray collimator, X-ray detector system and CT device |
| US20210298698A1 (en) * | 2020-03-30 | 2021-09-30 | Neusoft Medical Systems Co., Ltd. | X-ray collimator, x-ray detector system and ct device |
| CN111617393A (en) * | 2020-06-19 | 2020-09-04 | 新里程医用加速器(无锡)有限公司 | Beam limiting device, multi-leaf grating and radiotherapy equipment |
| CN112402814A (en) * | 2020-11-12 | 2021-02-26 | 中国人民解放军海军军医大学 | Fixed shielding device and method for local irradiation of batch animal ionizing radiation with adjustable target area |
| CN112402814B (en) * | 2020-11-12 | 2022-07-12 | 中国人民解放军海军军医大学 | Fixed shielding device and method for local irradiation of batch animal ionizing radiation with adjustable target area |
| CN113663230B (en) * | 2021-07-27 | 2023-09-26 | 上海联影医疗科技股份有限公司 | Collimator and treatment head with same |
| CN113663230A (en) * | 2021-07-27 | 2021-11-19 | 上海联影医疗科技股份有限公司 | Collimator and treatment head with same |
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