CN106334277A - Medical primary collimation structure of heavy ion beam - Google Patents
Medical primary collimation structure of heavy ion beam Download PDFInfo
- Publication number
- CN106334277A CN106334277A CN201610894715.5A CN201610894715A CN106334277A CN 106334277 A CN106334277 A CN 106334277A CN 201610894715 A CN201610894715 A CN 201610894715A CN 106334277 A CN106334277 A CN 106334277A
- Authority
- CN
- China
- Prior art keywords
- screw
- collimating
- collimating vanes
- vanes
- nut seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1042—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head
- A61N5/1045—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head using a multi-leaf collimator, e.g. for intensity modulated radiation therapy or IMRT
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
- A61N2005/1087—Ions; Protons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Abstract
The invention discloses a medical primary collimation structure of a heavy ion beam, for overcoming the problems of large volume, heavy weight, large occupied space, compatible functions, unfavorable association during repair and fault processing, low adjustment precision and incapability of satisfying a continuous adjustment requirement in the prior art. The medical primary collimation structure of the heavy ion beam is characterized in that a left-right horizontal ball lead screw assembly and a left-right vertical ball lead screw assembly, and the left-right horizontal ball lead screw assembly is connected with a left collimation blade through a left collimation blade connecting plate and is connected with a right collimation blade through a right collimation blade connecting plate; and the left-right vertical ball lead screw assembly is connected with an upper collimation blade through an upper collimation blade connecting plate and is connected with a lower collimation blade through a lower collimation blade connecting plate. The medical primary collimation structure comprises the following advantages: the structure is simple, the four collimation blades can be driven to synchronously open and closed simply through two left-right ball lead screws, there is a single function, the operation is simple and reliable, the maintenance is simple, and the requirement for synchronous and continuous adjustment of heavy ion beam channel primary collimation in a heavy ion tumor treatment apparatus can be satisfied.
Description
Technical field
The invention belongs to technical field of medical equipment, particularly to for one of Heavy Ion Cancer Therapy device weight from
The medical primary collimating structure of beamlet stream.
Background technology
Carrying out tumour radiotherapy using HIB light beam is a kind of brand-new medical mode, with respect to traditional tumor
Therapeutic modality, this therapeutic modality has safe, minimally invasive and quick feature, is a kind of accurate treatment technology.Heavy ion beam current
Medical example of primary collimator be Heavy Ion Cancer Therapy device important component part, its effect has two aspects, on the one hand
It determines the greatest irradiation open country scope that this accelerator can be provided by, and on the other hand, it is extraneous that it blocks greatest irradiation open country
The primary radiation being produced by radiation source, is the primary modulation to irradiation field in heavy ion tumour radiotherapy, is placed on heavy ion
Stream outlet position, on the basis of beam center, irradiation field modulation is become square open country, joins additionally as tungsten door and multi-leaf optical grating
Close and use.In this process, need to complete the synchronization control of the primary collimation of HIB passage.Complete in prior art weight from
The utility model of primary collimating structure such as Application No. cn201120570089.7 of synchronization control of the primary collimation of beamlet passage
A kind of disclosed clinac expansion filter governor motion, this utility model includes example of primary collimator, described primary
It is provided with four relative chutes and for fixing the fixed block of expansion filter and governor motion and passing through fixing spiral shell in collimator
Nail is connected with example of primary collimator；It is provided with this example of primary collimator for independent regulation expansion filter at 4 of gt and ab direction
Regulating block, and be connected with fixed block by adjusting screw, regulating block is in chute, and is in tiltedly with expansion filter contacts face
Face.This utility model there is problems that, it is a relatively independent structural member, this relatively independent structural member, volume
Greatly, weight is big, takes up space big, needs heavy ion beam current exit position to provide larger installing space, and function is compatible, in dimension
Repair and during troubleshooting, unfavorable association can be produced；Additionally, this utility model is attached using sunk screw, exist asks
Topic is that sunk screw need to contribute fastening function and self-locating function, so will disturb adjustment, and machining accuracy is proposed
Pole is strict with, the 3rd, this utility model due to adjusted by adjusting screw, regulating block and manual adjust, precision low it is impossible to full
Sufficient continuously adjustable requires.
The applicant carry out structure improve during, drive 4 collimating vanes synchronous using 4 motors, 4 leading screws
Folding, complex structure, volume is still larger, and installation and debugging are loaded down with trivial details, and cost clothing is higher, requires further improvement.
Content of the invention
The technical problem to be solved is, in place of overcoming the deficiencies in the prior art, provides a kind of function-specific, knot
Structure is simple, easy and simple to handle, reliable, easy to repair, and a kind of medical primary collimating structure of heavy ion beam current of continuously controllable.
The technical solution used in the present invention includes carriage, about fixed installation on the left column and right column of carriage
Revolve horizontal ball screw assembly, left-right rotary horizontal ball screw assembly is won in succession by left collimating vanes and connected left collimating vanes, left
Dextrorotation horizontal ball screw assembly is won in succession by right collimating vanes and is connected right collimating vanes；Entablature and sill in carriage
Upper fixed installation left-right rotary vertical ball screw assembly, left-right rotary vertical ball screw assembly is won in succession connection by upper collimating vanes
Upper collimating vanes, left-right rotary vertical ball screw assembly is won in succession by lower collimating vanes and is connected lower collimating vanes.
The horizontal ball screw assembly of described left-right rotary by the horizontal ball screw of left-right rotary, left screw, left screw fixing screws,
Left nut seat, right screw, right screw fixing screws and right nut seat are constituted, and install left screw on the horizontal ball screw of left-right rotary
With right screw, described left screw and right screw and the horizontal ball screw of left-right rotary are all that gyration is paid and is converted to linear motion
Pay；Left screw is connected with left nut seat by left screw fixing screws, and right screw is by right screw fixing screws and right nut seat
Connect, left nut seat connects left collimating vanes by left nut seat fixing screws and wins in succession, and left collimating vanes are won in succession by left collimation
Blade fixing screws connect left collimating vanes；Right nut seat connects right collimating vanes by right nut seat fixing screws and wins in succession, right
Collimating vanes are won in succession and are connected right collimating vanes by right collimating vanes fixing screws assembly.
The vertical ball screw assembly of described left-right rotary is by the vertical ball screw of left-right rotary, upper screw, lower screw fixing screws
Assembly, upper nut seat, lower screw, lower screw fixing screws assembly and lower nut seat composition, described upper screw and lower screw and a left side
The vertical ball screw of dextrorotation is all that gyration is paid and is converted to straight-line pair, installs silk on the vertical ball screw of left-right rotary
Female and lower screw, upper screw is connected with upper nut seat by upper screw fixing screws；Lower screw by lower screw fixing screws with
Lower nut seat connects, and lower nut seat connects lower collimating vanes by lower nut seat fixing screws and wins in succession, and lower collimating vanes are won in succession logical
Cross down collimating vanes fixing screws and connect lower collimating vanes, upper nut seat connects upper collimating vanes by upper nut seat fixing screws
Win in succession, upper collimating vanes are won in succession and connected upper collimating vanes by upper collimating vanes fixing screws.
Described left collimating vanes are 1 hexahedron, are machined with hole of tightening up a screw the top surface of left collimating vanes is corresponding with bottom surface
With lower screw hole.
Described right collimating vanes, upper collimating vanes are identical with the structure of left collimation leaf 2 with lower collimating vanes, in left collimation leaf
It is provided with the double-head arrow representing that left collimating vanes and right collimating vanes can move leftwards and rightwards, in upper standard before piece and right collimating vanes
It is provided with before prismatic blade and lower collimating vanes and represent that upper collimating vanes and lower collimating vanes can be to the double-head arrows moving up and down.
Described carriage 1 forms quadra by left column, right column, entablature and sill, this quadra ×
Height × a width of 500 mm × 500 mm × 122 mm.
Angular contact bearing is passed through on the left column and right column of described carriage and zanjon bearing fixedly mounts left-right rotary
Horizontal ball screw assembly, passes through angular contact bearing and the fixing peace of zanjon bearing on the entablature and sill of described carriage
Dress left-right rotary vertical ball screw assembly.
Compared with prior art, the invention has the beneficial effects as follows:
(1) due to drive mechanism is formed using left-right rotary horizontal ball screw assembly and left-right rotary vertical ball screw assembly, only
Need 2 servomotors, 2 left-right rotary ball screws just can drive 4 collimating vanes synchronous on-offs, structure is simple, and function is special
One, and when using in servomotor under control, accurately can continuously adjust, substantially increase reliability of structure.
(2) also due to being tied using left-right rotary horizontal ball screw assembly and the composition transmission of left-right rotary vertical ball screw assembly
It is only necessary to 2 servomotors, 2 left-right rotary ball screws drive 4 collimating vanes synchronous on-offs to structure, small volume, carriage
Long × high × wide only 500 mm × 500 mm × 122mm, takes up space little, can save the installation of heavy ion beam current exit position
Space, all brings conveniently to installation and debugging, also saves manufacturing cost simultaneously.
(3) present invention uses in compact space left collimating vanes, right collimating vanes, on collimating vanes and lower collimation
Blade construction is identical, has interchangeability, easy for installation, easy to repair, and folding is synchronous, disclosure satisfy that Heavy Ion Cancer Therapy device
Synchronous, the continuously adjustable of the primary collimation of middle HIB passage require.
Brief description
Fig. 1 is the structural representation of the present invention,
Fig. 2 is the rearview of Fig. 1,
Fig. 3 is the a-a sectional view of Fig. 1,
Fig. 4 is the b-b cutaway view Amplified image of Fig. 1,
Fig. 5 is the c-c sectional view of Fig. 1,
Fig. 6 is the profile of figure collimating vanes.
In figure:
1. carriage,
1-1. left column, 1-2. right column,
1-3. entablature, 1-4. sill,
2. left collimating vanes,
3. left collimating vanes are won in succession,
4. left collimating vanes fixing screws,
5. left nut seat fixing screws,
6. left screw fixing screws,
7. left screw,
8. left nut seat,
9. the horizontal ball screw of left-right rotary,
10. right screw fixing screws,
11. right screws,
12. right nut seats
13. right nut seat fixing screws,
14. right collimating vanes are won in succession,
15. right collimating vanes fixing screws,
16. right collimating vanes,
Collimating vanes on 17.,
18. times collimating vanes
The vertical ball screw of 19. left-right rotaries,
Screw fixing screws on 20.,
Screw on 21.,
Nut seat on 22.
Nut seat fixing screws on 23.,
On 24., collimating vanes are won in succession,
Collimating vanes fixing screws on 25.,
26. times screw fixing screws,
27. times screws
28. times nut seats
29. lower nut seat fixing screws,
30. times collimating vanes are won in succession,
31. times collimating vanes fixing screws
32. angular contact bearings,
33 zanjon bearings.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is elaborated.
As shown in drawings, the technical solution used in the present invention includes carriage 1, and described carriage 1 is by left column 1-1, the right side
Column 1-2, entablature 1-3 and sill 1-4 composition quadra, length × height × a width of 500 mm × 500 of this quadra
Mm × 122 mm, takes up space little, can save the installing space of heavy ion beam current exit position, to installation and debugging all sides of bringing
Just；The left column 1-1 and right column 1-2 of carriage 1 are machined with through hole, left column 1-1 and right column 1-2 process
Through hole in the horizontal ball screw of left-right rotary 9 is fixedly mounted by angular contact bearing 32 and zanjon bearing 33, in left-right rotary level
Left screw 7 and right screw 11 are installed on ball screw 9, described left screw 7 and right screw 11 are with the horizontal ball screw of left-right rotary 9 all
It is that gyration is paid and is converted to straight-line pair；Left screw 7 is connected with left nut seat 8 by left screw fixing screws 6；Right screw
11 are connected with right nut seat 12 by right screw fixing screws assembly 10, by the horizontal ball screw of left-right rotary 9, left screw 7, left silk
Female fixing screws 6, left nut seat 8, right screw 11, right screw fixing screws assembly 10 and right nut seat 12 constitute left-right rotary level
Ball screw assembly；This left-right rotary horizontal ball screw assembly is fixed on carriage 1 by the horizontal ball screw of left-right rotary 9
On；Left nut seat 8 connects left collimating vanes by left nut seat fixing screws 5 and wins 3 in succession, and left collimating vanes win 3 in succession by left standard
Prismatic blade fixing screws 4 connect left collimating vanes 2；Right nut seat 12 connects right collimating vanes by right nut seat fixing screws 13
Win 14 in succession, right collimating vanes are won in succession and 14 connected right collimating vanes 16 by right collimating vanes fixing screws 15；Upper in carriage
Angular contact bearing 32 is passed through on crossbeam 1-3 and sill 1-4 and zanjon bearing 33 fixedly mounts the vertical ball screw of left-right rotary 19,
Screw 21 and lower screw 27, described upper screw 21 and lower screw 27 and left-right rotary are installed on the vertical ball screw of left-right rotary 19
Vertically ball screw 19 is all that gyration is paid and is converted to straight-line pair；Upper screw 21 by upper screw fixing screws 20 with upper
Nut seat 22 connects；Lower screw 27 is connected with lower nut seat 28 by lower screw fixing screws 26, by the vertical ball wire of left-right rotary
Bar 19, upper screw 21, lower screw fixing screws 26, upper nut seat 22, lower screw 27, lower screw fixing screws 26 and lower nut seat
28 composition left-right rotary vertical ball screw assemblies, this left-right rotary vertical ball screw assembly passes through the vertical ball screw of left-right rotary 19
It is fixed on carriage 1, lower nut seat 28 connects lower collimating vanes by lower nut seat fixing screws 29 and wins 30 in succession, lower standard
Prismatic blade wins 30 in succession by the lower collimating vanes 18 of lower collimating vanes fixing screws 31 connection, and upper nut seat 22 is solid by upper nut seat
Determine screw 23 and connect upper collimating vanes to win 24 in succession, upper collimating vanes are won in succession and 24 connected upper standard by upper collimating vanes fixing screws 25
Prismatic blade 17；
, described left collimating vanes 2 are 1 hexahedron, in top surface and the bottom surface pair of left collimating vanes 2 taking left collimating vanes 2 as a example
The hole 2-1 and tighten up a screw hole 2-2 of tightening up a screw should be machined with, described right collimating vanes 16 are identical with left collimating vanes 2 structure, described on
Collimating vanes 17 are identical with the structure of left collimating vanes 2 and right collimating vanes 16 with the concrete structure of lower collimating vanes 18, simply
Ratate 90 degrees installation, be provided with the left collimating vanes 2 of expression and right collimating vanes before left collimating vanes 2 and right collimating vanes 16
16 double-head arrows that can move leftwards and rightwards, are provided with collimating vanes 17 in expression before upper collimating vanes 17 and lower collimating vanes 18
Can be to the double-head arrow moving up and down with lower collimating vanes 18.
During use, by the horizontal ball screw of left-right rotary 9 and horizontal servo motor connection, the vertical ball screw of left-right rotary 19
With vertical servo motor connection, according to setting up the speed needing, make the horizontal ball screw of left-right rotary 9 and the vertical ball wire of left-right rotary
Bar 19 synchronous axial system, the horizontal ball screw of left-right rotary 9 drives left collimating vanes 2 and right collimating vanes 16 go in the same direction or opposite and
OK, the vertical ball screw of left-right rotary 19 drives upper collimating vanes 17 and lower collimating vanes 18 to go in the same direction or go opposite to each other, you can
Reach 4 collimating vanes synchronous on-offs, complete the continuous synchronization adjustment of the primary collimation of HIB passage.
Claims (7)
1. the medical primary collimating structure of a kind of heavy ion beam current, including carriage (1) it is characterised in that on carriage (1)
Fixed installation left-right rotary horizontal ball screw assembly, left-right rotary horizontal ball screw assembly wins (3) in succession even by left collimating vanes
Connect left collimating vanes (2), left-right rotary horizontal ball screw assembly by right collimating vanes win in succession (14) connect right collimating vanes
(16)；In carriage (1) upper fixed installation left-right rotary vertical ball screw assembly, left-right rotary vertical ball screw assembly passes through upper
Collimating vanes are won in succession collimating vanes (17) in (24) connection, and left-right rotary vertical ball screw assembly is won in succession by lower collimating vanes
(30) lower collimating vanes (18) are connected.
2. according to claim 1 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that described left-right rotary
Horizontal ball screw assembly is by the horizontal ball screw of left-right rotary (9), left screw (7), left screw fixing screws (6), left nut seat
(8), right screw (11), right screw fixing screws (10) and right nut seat (12) are constituted, on the horizontal ball screw of left-right rotary (9)
Left screw (7) and right screw (11) are installed, described left screw (7) and right screw (11) are with the horizontal ball screw of left-right rotary (9) all
It is that gyration is paid and is converted to straight-line pair；Left screw (7) is connected with left nut seat (8) by left screw fixing screws (6),
Right screw (11) is connected with right nut seat (12) by right screw fixing screws (10), and it is solid that left nut seat (8) passes through left nut seat
Determine screw (5) connect left collimating vanes win in succession (3), left collimating vanes win in succession (3) connected by left collimating vanes fixing screws (4)
Left collimating vanes (2)；Right nut seat (12) connects right collimating vanes by right nut seat fixing screws (13) and wins in succession (14), right standard
Prismatic blade wins (14) in succession by right collimating vanes fixing screws assembly (15) the right collimating vanes of connection (16).
3. according to claim 1 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that described left-right rotary
Vertically ball screw assembly by the vertical ball screw of left-right rotary (19), upper screw (21), lower screw fixing screws assembly (26), on
Nut seat (22), lower screw (27), lower screw fixing screws assembly (26) and lower nut seat (28) are constituted, described upper screw (21)
It is all that gyration is paid and is converted to straight-line pair with lower screw (27) and the vertical ball screw of left-right rotary (19), erect in left-right rotary
Install screw (21) and lower screw (27) on straight ball screw (19), upper screw (21) by upper screw fixing screws (20) and
Upper nut seat (22) connects；Lower screw (27) is connected with lower nut seat (28) by lower screw fixing screws (26), lower nut seat
(28) connect lower collimating vanes by lower nut seat fixing screws (29) to win in succession (30), lower collimating vanes win (30) in succession by lower standard
Prismatic blade fixing screws (31) connect lower collimating vanes (18), and upper nut seat (22) is connected by upper nut seat fixing screws (23)
Upper collimating vanes are won in succession (24), and upper collimating vanes win (24) in succession by collimating vanes in the connection of upper collimating vanes fixing screws (25)
(17).
4. according to claim 1 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that described left collimation
Blade (2) is 1 hexahedron, is machined with hole of tightening up a screw (2-1) and lower screw the top surface of left collimating vanes (2) is corresponding with bottom surface
Hole (2-2).
5. according to claim 4 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that described right collimation
Blade (16), upper collimating vanes (17) are identical with the structure of left collimating vanes (2) with lower collimating vanes (18), in left collimating vanes
(2) and it is provided with before right collimating vanes (16) and to represent that left collimating vanes (2) and right collimating vanes (16) can move leftwards and rightwards
Double-head arrow, is provided with the upper collimating vanes (17) of expression and lower collimation leaf before upper collimating vanes (17) and lower collimating vanes (18)
Piece (18) can be to the double-head arrow moving up and down.
6. according to claim 1 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that described support
Frame 1 forms quadra by left column (1-1), right column (1-2), entablature (1-3) and sill (1-4), this quadra
Length × height × a width of 500 mm × 500 mm × 122 mm.
7. according to claim 6 a kind of medical primary collimating structure of heavy ion beam current it is characterised in that in described support
The left column (1-1) of frame (1) and right column (1-2) above pass through about angular contact bearing (32) and zanjon bearing (33) fixed installation
Revolve horizontal ball screw assembly, the entablature (1-3) in described carriage (1) and sill (1-4) above pass through angular contact bearing
(32) and zanjon bearing (33) fixed installation left-right rotary vertical ball screw assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610894715.5A CN106334277A (en) | 2016-10-14 | 2016-10-14 | Medical primary collimation structure of heavy ion beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610894715.5A CN106334277A (en) | 2016-10-14 | 2016-10-14 | Medical primary collimation structure of heavy ion beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106334277A true CN106334277A (en) | 2017-01-18 |
Family
ID=57840402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610894715.5A Pending CN106334277A (en) | 2016-10-14 | 2016-10-14 | Medical primary collimation structure of heavy ion beam |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009291504A (en) * | 2008-06-09 | 2009-12-17 | Hitachi Medical Corp | X-ray diagnostic imaging apparatus |
| CN101915613A (en) * | 2010-08-02 | 2010-12-15 | 中国科学院长春光学精密机械与物理研究所 | Slit adjusting device capable of adjusting slit width in double directions |
| CN202409871U (en) * | 2011-12-31 | 2012-09-05 | 成都利尼科医学技术发展有限公司 | Adjusting mechanism for flattening filter of medical linear accelerator |
| CN102841107A (en) * | 2012-09-07 | 2012-12-26 | 中国原子能科学研究院 | Biaxial automatic beam limiting diaphragm for heavy-ion single-particle effect test |
| CN206549003U (en) * | 2016-10-14 | 2017-10-13 | 沈阳慧宇真空技术有限公司 | A kind of medical primary collimating structure of heavy ion beam current |
-
2016
- 2016-10-14 CN CN201610894715.5A patent/CN106334277A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009291504A (en) * | 2008-06-09 | 2009-12-17 | Hitachi Medical Corp | X-ray diagnostic imaging apparatus |
| CN101915613A (en) * | 2010-08-02 | 2010-12-15 | 中国科学院长春光学精密机械与物理研究所 | Slit adjusting device capable of adjusting slit width in double directions |
| CN202409871U (en) * | 2011-12-31 | 2012-09-05 | 成都利尼科医学技术发展有限公司 | Adjusting mechanism for flattening filter of medical linear accelerator |
| CN102841107A (en) * | 2012-09-07 | 2012-12-26 | 中国原子能科学研究院 | Biaxial automatic beam limiting diaphragm for heavy-ion single-particle effect test |
| CN206549003U (en) * | 2016-10-14 | 2017-10-13 | 沈阳慧宇真空技术有限公司 | A kind of medical primary collimating structure of heavy ion beam current |
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Application publication date: 20170118 |