CN100563751C - Gamma ray focusing radiation unit - Google Patents
Gamma ray focusing radiation unit Download PDFInfo
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- CN100563751C CN100563751C CNB2007100512137A CN200710051213A CN100563751C CN 100563751 C CN100563751 C CN 100563751C CN B2007100512137 A CNB2007100512137 A CN B2007100512137A CN 200710051213 A CN200710051213 A CN 200710051213A CN 100563751 C CN100563751 C CN 100563751C
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Abstract
A kind of gamma ray focusing radiation unit, comprise: shield, the source body, the collimation body, the transmission group body, it is characterized in that: 8-12 radioactive source is housed on the body of source and is divided into two groups, every group of 4-6 radioactive source, it is in 40-80 ° two bar shapeds or fan-shaped housing that two groups of radioactive sources are symmetrically distributed in difference of longitude, thereby form the space arc of a subtended angle greater than 130 degree, many group collimators are housed on the collimation body, the regularity of distribution of radioactive source is consistent on the regularity of distribution of collimator and the source body, the collimator of adjacent set remains on 3-5 ° interval at the interval of 15-20 ° of longitude maintenance on the latitude.Its advantage is: can form the space arc of a subtended angle greater than 130 degree; And the formation hook changes gathering; The uniformity of the dosage in the target area and the efficient of equipment have been improved; Dose distribution is more even, treats more accurate; Reduce the number of radioactive source, reduced the difficulty of manufacturing cost and processing.
Description
Technical field
The present invention relates to technical field of medical instruments, specifically a kind of gamma ray focusing radiation unit.
Background technology
Existing gamma ray stereotactic irradiation system (also claiming the γ cutter) is a kind of precise radiotherapy equipment, their radiating element all is to adopt the geometric focusing principle, its objective is and utilize gamma ray that the focus target spot is produced heavy dose of irradiation, and the infringement of target spot normal surrounding tissue is minimized the treatment ratio of gains when promptly improving radiotherapy.For reaching this purpose, existing γ cutter all adopts at a revolution solid (carry source body) a plurality of CO60 radioactive sources that distributing on as sphere, each radioactive source is aimed at a public focus by the collimation passage with ray, thereby forms a high dose area at the focus place.As CN1050062C, CN2590600Y, CN03125396 discloses several gamma ray radiation units etc. patent, and it comprises the worn-out body of radiation screen, carries source body and collimation body.Their common trait is the CO60 radioactive source that is furnished with on the body of source more than 20 that carries at how much housings of a revolution, these radioactive sources generally are divided into the 4-6 group, every group of radioactive source is distributed in by certain latitude and carries on the body housing of source, the difference of longitude in adjacent every group of source is 50-90 °, and be evenly distributed in the 0-360 ° of longitude, this arrangement is subjected to treating the restriction of space (public focus must arrive and carry the outer distance of source body cutting plane) and focus dosage field distribution character because of latitude, making can be fewer at the group number (kind of launched field specification) that collimates installable collimation passage on the body, and product in the market can only be furnished with the 2-3 kind.Relatively poor and the difficult control of conformal degree of the uniformity that the tumor target dose all distributed when less collimation passage kind will cause the body tumour radiotherapy, thereby influence the local control rate of oncotherapy and the accuracy of treatment, also can reduce the efficient that the user formulates therapeutic scheme simultaneously.
Summary of the invention
The objective of the invention is to develop a kind of brand-new radioactive source arrangement, it is more even to make in the tumor target area that dosage all distributes, and suitable shape is higher, treats more accurate gamma ray radiation unit.
Gamma ray focusing radiating element of the present invention comprises radiation protection shield 8, source body 5, collimation body 4, transmission component 1, collimation passage 7 etc.
Radioactive source cuts body 5 (being called for short the source body) and installs in the radiation protection shield 8, and source body 5 can be equipped with a plurality of CO60 radioactive sources around axis rotation on the source body 5.Collimation body 6 is housed in the body of source, and collimation body 6 is installed with ray collimation passage 7 (abbreviation collimator) around rotating with source body 5 identical gyroaxises on the collimation body 6.The Co60 radioactive source collimates by collimator and collects on the public focus, and focus is positioned at source body 5, and on collimation body 6 axiss of rotation, axis of rotation is parallel or perpendicular to human body.Source body 5, collimation body 6 gyroaxises link to each other with actuating device.
A plurality of Co60 radioactive sources are housed on the radioactive source carrier.Co60 radioactive source number depends on the treatment ratio of gains, the physical property of focus, installable collimator specification kind, manufacturing cost etc.Because the rotating focus of source body, the number in source increases can not improve the ratio of gains because of beam superposes near focus, so rationally Co60 radioactive source number should be 8～12, they are divided into 2 groups, every group of 4～6 Co60 radioactive sources, and to be symmetrically distributed in difference of longitude be in 40～80 ° two bar shapeds or fan-shaped housing, thereby form the space arcs of a subtended angle greater than 130 degree.Finish after hook changes the tumor target area is focused on irradiation.
Many group collimators are housed on the collimation body.Every group of collimator is corresponding to a kind of launched field of specification, and every group of collimator comprises 8～12 collimation passages, and they are consistent with the regularity of distribution of 8～12 Co60 radioactive sources on being installed in the source body in the regularity of distribution on the collimation body.The collimator of adjacent set keeps 15～20 ° interval at least at longitude, remains on 3～5 ° interval on the latitude, to guarantee to collimate the collimation effectiveness of terminal.The arrangement of our this provenance is allowed the collimator that can install more than 4 groups on the collimation body so, can reach the collimator of 11 kinds of specifications at most, between longitude scope ± 160 that they occupy °～± 165 °.We will be defined as the boundary control collimator at 5～15mm in public focus place launched field size, be mainly used in optimization of border, tumor target area and target area and transfer strong; The launched field size is defined as the occupy-place collimator at 20～60mm, is mainly used in the tumor target area and fills.3 kinds of specifications of boundary control collimator wherein, the spatial resolution of boundary control collimator is 4-6mm.Occupy-place collimator 4-5 kind specification, its spatial resolution is 10～15mm.
The advantage of gamma ray focusing radiating element of the present invention:
1. by selecting the number and the distribution thereof of reasonable radioactive source, can form the space arc of a subtended angle greater than 130 degree.And the formation hook changes gathering.
2. reasonably radioactive source is arranged, makes that open ended collimator is more, thereby has improved the target area conformal degree, has also improved the uniformity of the dosage in the target area and the efficient of equipment simultaneously.
3. according to the character and the effect of collimator, the spatial resolution of choose reasonable launched field etc. make that the intensity adjustment of tumor target area is more easy, and dose distribution is more even, treats more accurate.
4. because rational radioactive source divides into groups and distributes, reduce the number of radioactive source, reduced the difficulty of manufacturing cost and processing.
Description of drawings
Fig. 1. the gamma ray focusing radiation unit structural representation.
Fig. 2. collimation channel arrangement figure.
Fig. 3 collimates channel arrangement figure.
Fig. 4. the radioactive source layout drawing.
Fig. 5. the radioactive source layout drawing.
The specific embodiment
According to shown in Figure 1, in radiating element, source body 5 is installed in the radiation protection body 8, and one group of Co60 radioactive source 6 is installed on source body 5, and these Co60 radioactive sources are all aimed at a public focus O; The inner chamber of collimation body 4 and source body 5 is connected mutually, on collimation body 4 some groups basic collimator 7 is installed, and the regularity of distribution of every group of basic collimator on collimation body 4 is identical in the regularity of distribution of source body 5 with radioactive source.Fig. 2 and Fig. 3 are the arrangements of 2 kinds of radioactive sources, source body 5 is made up of two symmetric fan shell bodies, arrange eight radioactive sources thereon and be divided into two groups, they are symmetrically distributed on the source body 5, the longitude scope that every group of radioactive source spatially occupies is 60 degree, and the difference of longitude of adjacent radioactive source is 20 degree.Fig. 4 and Fig. 5 be and Fig. 2, and the arrangement mode of the corresponding different apertures of the layout of Fig. 3 radioactive source collimator and shielding rod is furnished with 8 groups altogether, and the difference of longitude of adjacent collimator group is 18 degree.Collimation body 4 connects by axle 5 and collimation body drive disk assembly 1, and source body 5 connects by axle 2 and drive disk assembly 1.Collimator and shielding rod adopt heavy metal material to make, and for example tungsten alloy or depleted nuclear fuel are to strengthen shield effectiveness.
Claims (4)
1, a kind of gamma ray focusing radiation unit, comprise: shield, the source body, the collimation body, the transmission group body, it is characterized in that: 8-12 radioactive source is housed on the body of source and is divided into two groups, every group of 4-6 radioactive source, it is in 40-80 ° two bar shapeds or fan-shaped housing that two groups of radioactive sources are symmetrically distributed in difference of longitude, thereby form the space arc of a subtended angle greater than 130 degree, many group collimators are housed on the collimation body, the regularity of distribution of radioactive source is consistent on the regularity of distribution of collimator and the source body, the collimator of adjacent set remains on 3-5 ° interval at the interval of 15-20 ° of longitude maintenance on the latitude.
2, gamma ray focusing radiation unit according to claim 1 is characterized in that: every group of collimator correspondence a kind of radiation field size of specification.
3, gamma ray focusing radiation unit according to claim 1 is characterized in that: dress 4-11 group collimator on the collimation body.
4, gamma ray focusing radiation unit according to claim 1 is characterized in that: collimator is boundary control collimator or occupy-place collimator, and their spatial resolution is respectively 4-6mm and 10-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100512137A CN100563751C (en) | 2007-01-04 | 2007-01-04 | Gamma ray focusing radiation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100512137A CN100563751C (en) | 2007-01-04 | 2007-01-04 | Gamma ray focusing radiation unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN100998909A CN100998909A (en) | 2007-07-18 |
| CN100563751C true CN100563751C (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100512137A Expired - Fee Related CN100563751C (en) | 2007-01-04 | 2007-01-04 | Gamma ray focusing radiation unit |
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| CN (1) | CN100563751C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102446571B (en) * | 2010-09-30 | 2014-03-05 | 上海世鹏实验室科技发展有限公司 | Self-focusing radioactive source device and radiation device thereof |
| CN109791810B (en) * | 2016-07-06 | 2024-03-08 | 克莱姆森大学研究基金会 | Radiation delivery device and application thereof |
| CN109157761B (en) * | 2018-08-24 | 2021-06-04 | 西安大医集团股份有限公司 | Radiotherapy system |
-
2007
- 2007-01-04 CN CNB2007100512137A patent/CN100563751C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 开放式全身伽马刀控制系统. 朱国力等.机电一体化，第3卷. 2001 |
| 开放式全身伽马刀控制系统. 朱国力等.机电一体化，第3卷. 2001 * |
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| Publication number | Publication date |
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| CN100998909A (en) | 2007-07-18 |
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