CN209405528U - A kind of multi-diaphragm collimator - Google Patents
A kind of multi-diaphragm collimator Download PDFInfo
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- CN209405528U CN209405528U CN201821368298.1U CN201821368298U CN209405528U CN 209405528 U CN209405528 U CN 209405528U CN 201821368298 U CN201821368298 U CN 201821368298U CN 209405528 U CN209405528 U CN 209405528U
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- light source
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Abstract
The utility model relates to a kind of structures of radiotherapy multi-diaphragm collimator, including two groups of blades, lobe numbers are identical, and the side wall of each blade is parallel with the ray of point light source sending, and the projection width under the irradiation of point light source on equal central planes is equal and projection long side is parallel；It is respectively superposed in two groups of blades from two projection long side extended lines of a pair of of blade of same direction number same sequence number；Direction relative misalignment certain distance of two groups of blades along point light source to point light source rotation center line；Two groups of blades either monofocal blade or double focusing blade, can be interlaced when they are moved towards, and will not be in contact.
Description
Technical field
The utility model relates to a kind of multi-diaphragm collimators.
Background technique
Currently, carry out intensity modulated radiation therapy using medical accelerator uses multi-diaphragm collimator more, during adjusting intense irradiation, some
The blade moved towards can be closed in advance, but be technically difficult to and be closed completely, and ray leakage is had at closure and is penetrated.To prevent from penetrating
Line is penetrated through leaking at blade closure, it is desirable that the vane nose of closure speeds away irradiation area, even if being also difficult to avoid that in this way in leaf
Piece front end face still has leakage during leaving launched field and penetrates.
Utility model content
The utility model provides a kind of multi-diaphragm collimator, and to solve existing multi-diaphragm collimator, launched field is left in end face in front of the blade
During there are still leakage penetrate the technical issues of.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of multi-diaphragm collimator blocks the ray of point light source (2) sending for selectivity, and the point light source (2) can be around point
Light source rotation center (5) rotation, by the light source (2) rotation center (5) and with point light source (2) to point light source rotation center
(5) the vertical plane of line (22) forms equal central planes (3), and the multi-diaphragm collimator includes two groups of opposite blades
(1), two groups of blades (1) along point light source (2) to the direction relative misalignment of point light source rotation center (5) line (22), it is described
Every group of lobe numbers in two groups of blades (1) are identical；It is characterized in that the side wall of each blade in two groups of blades (1) is equal
It is parallel with ray (21) that point light source (2) issue；All blades are under the irradiation of point light source (2) in equal central planes (3)
On projection (4) width it is equal and projection long side (41) is parallel；From same direction number same sequence number in two groups of blades (1)
The extended line (42) of two projection long sides of a pair of of blade (1) is respectively superposed.
The front end face of each blade is that cambered surface (101), thereon each point and point light source (2) issue in two groups of blades (1)
Ray (21) it is tangent；The upper and lower end face of the blade is to face directly, and sideline (102) are parallel with central planes (3) are waited.
The front end face of each blade is to face (103) directly in two groups of blades (1), and each point and point light source (2) issue thereon
Ray (21) it is parallel；The upper and lower end face of the blade is cambered surface, and sideline (102) are with point light source (2) for the center of circle.
After adopting the above scheme, issued with point light source (2) due to the side wall of each blade in two groups of blades (1)
Ray (21) is parallel；Projection (4) width of all blades under the irradiation of point light source (2) on equal central planes (3) it is equal and
It is parallel to project long side (41)；From two projection long sides of a pair of of blade (1) of same direction number same sequence number in two groups of blades (1)
Extended line (42) be respectively superposed.Two groups of blades either monofocal blade or double focusing blade, they are opposite, move towards
Shi Buhui is in contact, and can be interlocked up and down, and the projection section of blade is overlapped, and thus the blade of closure need not be allowed again to leave photograph
Penetrate region.Two groups of blades are staggered up and down along point light source to point light source rotation center line direction, when blade is closed can multirow into one
Even if there is the overlapping of projecting blade blade contact will not occur for section distance.Solves existing multi-diaphragm collimator in front of the blade
The technical issues of end face is penetrated during leaving launched field there are still leakage.
Detailed description of the invention:
Fig. 1 is staggered floor multi-diaphragm collimator perspective view.
Fig. 2 is single collimation staggered floor multi-diaphragm collimator perspective view.
Fig. 3 is single collimation staggered floor multi-diaphragm collimator side view.
Fig. 4 is double-collimation staggered floor multi-diaphragm collimator perspective view.
Fig. 5 is double-collimation staggered floor multi-diaphragm collimator side view.
The meaning respectively identified in figure are as follows:
1 is two groups of blades, 11 be before being blade from a pair of of blade of same direction number same sequence number, 101 in two groups of blades
End cambered surface, 102 be the sideline faced directly above and below blade, 103 be that vane nose is faced directly, 104 be that the sideline of lower camber side, 2 are on blade
Point light source, 21 be point light source issue ray, 22 be point light source to point light source rotation center line, 23 be and blade front arc
Tangent ray, 24 rays parallel with being faced directly before blade, 3 for etc. central planes, 4 be two groups of blades etc. on central planes
Projection, 41 are the long side of projecting blade, 42 extension to project long side from two, a pair of of blade of same direction number same sequence number
Line, 5 are point light source rotation center.
Specific embodiment
As shown in Figure 1, a kind of multi-diaphragm collimator, is staggered floor multi-diaphragm collimator, the sending of point light source 2 is blocked for selectivity
Ray, point light source 2 can be rotated around point light source rotation center 5, be rotated by 2 rotation center 5 of light source and with point light source 2 to point light source
The vertical plane of the line 22 at center 5 forms equal central planes 3, and staggered floor multi-diaphragm collimator includes two groups of opposite blades 1, and two groups
Every group lobe numbers of the blade 1 in point light source 2 to the direction relative misalignment of 5 line 22 of point light source rotation center, two groups of blades 1
It is identical；The side wall of each blade in two groups of blades 1 is parallel with the ray 21 that point light source 2 issues；All blades are in point light source 2
Irradiation under 4 width of projection on equal central planes 3 it is equal and projection long side 41 is parallel；From the same direction in two groups of blades 1
The extended line 42 of two projection long sides of a pair of of blade 1 of number same sequence number is respectively superposed.
The front end face of each blade in two groups of blades 1 is cambered surface 101,21 phase of ray that each point is issued with point light source 2 thereon
It cuts；The upper and lower end face of blade is to face directly, and sideline 102 is parallel with central planes 3 are waited；Two groups of blades 1 are faced directly up and down along blade
102 direction of sideline is moved towards to any position respectively not to be in contact and is staggered.
In two groups of blades 1 front end face of each blade can also using as shown in Figure 2,3, to face 103 directly, thereon each point with
The ray 21 that point light source 2 issues is parallel；The upper and lower end face of blade is cambered surface, and sideline 102 is the center of circle with point light source 2；Two groups of leaves
Piece 1 is the center of circle with point light source 2, and 102 direction of sideline of lower camber side swings to any position in opposite directions respectively and do not occur along blade
It contacts and is staggered.
Two groups of blades either monofocal blade or double focusing blade, they are opposite, will not connect when moving towards
Touching, can interlock up and down, be overlapped the projection section of blade, thus the blade of closure need not be allowed again to leave irradiation area.Two groups
Blade along point light source to point light source rotation center line direction up and down be staggered, blade be closed when can multirow into a distance, even if
There is the overlapping of projecting blade, blade contact will not occur.Solving existing multi-diaphragm collimator, end face is left and is penetrated in front of the blade
The technical issues of being penetrated in wild process there are still leakage.
Claims (3)
1. a kind of multi-diaphragm collimator blocks the ray of point light source (2) sending for selectivity, the point light source (2) can be around light
Source rotation center (5) rotation, by the light source (2) rotation center (5) and with point light source (2) to point light source rotation center (5)
The vertical plane of line (22) form equal central planes (3), the multi-diaphragm collimator includes two groups of opposite blades (1), institute
State direction relative misalignment of two groups of blades (1) along point light source (2) to point light source rotation center (5) line (22), two groups of leaves
Every group of lobe numbers in piece (1) are identical；It is characterized in that the side wall of each blade in two groups of blades (1) with point light
The ray (21) that source (2) issues is parallel；Throwing of all blades under the irradiation of point light source (2) on equal central planes (3)
Shadow (4) width is equal and projection long side (41) is parallel；From a pair of of leaf of same direction number same sequence number in two groups of blades (1)
The extended line (42) of two projection long sides of piece (1) is respectively superposed.
2. multi-diaphragm collimator as described in claim 1, characterized in that the front end face of each blade is in two groups of blades (1)
Cambered surface (101), the ray (21) that each point and point light source (2) issue thereon are tangent；The upper and lower end face of the blade is to face directly, side
Line (102) is parallel with equal central planes (3).
3. multi-diaphragm collimator as described in claim 1, characterized in that the front end face of each blade is in two groups of blades (1)
Face (103) directly, each point is parallel with ray (21) that point light source (2) issues thereon；The upper and lower end face of the blade is cambered surface, side
Line (102) is with point light source (2) for the center of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368298.1U CN209405528U (en) | 2018-08-24 | 2018-08-24 | A kind of multi-diaphragm collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368298.1U CN209405528U (en) | 2018-08-24 | 2018-08-24 | A kind of multi-diaphragm collimator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209405528U true CN209405528U (en) | 2019-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821368298.1U Active CN209405528U (en) | 2018-08-24 | 2018-08-24 | A kind of multi-diaphragm collimator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209405528U (en) |
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2018
- 2018-08-24 CN CN201821368298.1U patent/CN209405528U/en active Active
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