IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0263594
(2014-04-28)
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등록번호 |
US-8890097
(2014-11-18)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Mitsubishi Electric Corporation
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대리인 / 주소 |
Buchanan Ingersoll & Rooney PC
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인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
There are provided a leaf row in which a plurality of leaf plates are arranged in the thickness direction of the row in such a way that the respective one end faces of the leaf plates are trued up and a leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that th
There are provided a leaf row in which a plurality of leaf plates are arranged in the thickness direction of the row in such a way that the respective one end faces of the leaf plates are trued up and a leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis. In each of the leaf plates, a facing side facing a leaf plate that is adjacent to that leaf plate in the thickness direction is formed of a plane including a first axis on the beam axis; the leaf plate drive mechanism drives the leaf plate along a circumferential orbit around the second axis, on the beam axis, that is perpendicular to the beam axis and the first axis.
대표청구항
▼
1. A multileaf collimator that is disposed on a beam orbit of an accelerated charged particle beam and that limits or forms an irradiation field of the charged particle beam in such a way that the irradiation field conforms to an irradiation subject, the multileaf collimator comprising: a leaf row i
1. A multileaf collimator that is disposed on a beam orbit of an accelerated charged particle beam and that limits or forms an irradiation field of the charged particle beam in such a way that the irradiation field conforms to an irradiation subject, the multileaf collimator comprising: a leaf row in which a plurality of leaf plates are arranged in the thickness direction thereof in such a way that the respective one end faces of the leaf plates are trued up; anda leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis of the charged particle beam,wherein each of the plurality of leaf plates has at least one curved surface having two different curvature radiuses in respective directions,wherein a first axis that is the center axis of one curvature radius out of the two curvature radiuses passes through a first reference point on the beam axis, andwherein a second axis that is the center axis of the other curvature radius passes through a second reference point that is on the beam axis and apart from the first reference point. 2. The multileaf collimator according to claim 1, wherein one of the curved surfaces having two different curvature radiuses in the respective directions is an endface corresponding to the bottom surface portion of the multileaf collimator. 3. The multileaf collimator according to claim 1, wherein one of the curved surfaces having two different curvature radiuses in the respective directions is an endface corresponding to the top surface portion of the multileaf collimator. 4. The multileaf collimator according to claim 2, wherein one of the curved surfaces having two different curvature radiuses in the respective directions is an endface corresponding to the top surface portion of the multileaf collimator. 5. A particle beam therapy system comprising: an irradiation nozzle that scans a particle beam supplied from an accelerator, by use of two electromagnets whose scanning directions are different from each other, and that irradiates the particle beam in such a way as to enlarge an irradiation field; anda multi-leaf collimator according to claim 1, disposed in a particle beam irradiated from the irradiation nozzle, wherein the multi-leaf collimator is disposed in such a way that the first axis coincides with the scanning axis of one of the two electromagnets and the second axis coincides with the scanning axis of the other one of the two electromagnets. 6. A particle beam therapy system comprising: an irradiation nozzle that scans a particle beam supplied from an accelerator, by use of two electromagnets whose scanning directions are different from each other, and that irradiates the particle beam in such a way as to enlarge an irradiation field; anda multi-leaf collimator according to claim 2, disposed in a particle beam irradiated from the irradiation nozzle, wherein the multi-leaf collimator is disposed in such a way that the first axis coincides with the scanning axis of one of the two electromagnets and the second axis coincides with the scanning axis of the other one of the two electromagnets. 7. A particle beam therapy system comprising: an irradiation nozzle that scans a particle beam supplied from an accelerator, by use of two electromagnets whose scanning directions are different from each other, and that irradiates the particle beam in such a way as to enlarge an irradiation field; anda multi-leaf collimator according to claim 3, disposed in a particle beam irradiated from the irradiation nozzle, wherein the multi-leaf collimator is disposed in such a way that the first axis coincides with the scanning axis of one of the two electromagnets and the second axis coincides with the scanning axis of the other one of the two electromagnets. 8. A particle beam therapy system comprising: an irradiation nozzle that scans a particle beam supplied from an accelerator, by use of two electromagnets whose scanning directions are different from each other, and that irradiates the particle beam in such a way as to enlarge an irradiation field; anda multi-leaf collimator according to claim 4, disposed in a particle beam irradiated from the irradiation nozzle, wherein the multi-leaf collimator is disposed in such a way that the first axis coincides with the scanning axis of one of the two electromagnets and the second axis coincides with the scanning axis of the other one of the two electromagnets. 9. The particle beam therapy system according to claim 5, wherein the irradiation nozzle enlarges the irradiation field through a spiral Wobbling method. 10. The particle beam therapy system according to claim 5, wherein the irradiation nozzle enlarges the irradiation field through a scanning method. 11. The particle beam therapy system according to claim 5, wherein scanning for one direction out of the two directions is performed by a deflection electromagnet that deflects the direction of a beam axis, and the beam axis on which the first position and the second position are set is the beam axis of a beam that enters the multi-leaf collimator. 12. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 5, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 13. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 6, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 14. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 7, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 15. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 8, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 16. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 9, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 17. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 10, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 18. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 11, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis. 19. A multileaf collimator that is disposed on a beam orbit of an accelerated charged particle beam and that limits or forms an irradiation field of the charged particle beam in such a way that the irradiation field conforms to an irradiation subject, the multileaf collimator comprising: a leaf row in which a plurality of leaf plates are arranged in the thickness direction thereof in such a way that the respective one end faces of the leaf plates are trued up; anda leaf plate drive mechanism that drives each of the plurality of leaf plates in such a way that the one end face approaches or departs from a beam axis of the charged particle beam, wherein each of the plurality of leaf plates is formed of part of a ring that is created (1) by rotating a cross section surrounded by two arcs that are (i) coaxial with each other with respect to a first axis including a first reference point, and (ii) have respective different radiuses, and (2) by rotating two straight lines that are on a plane perpendicular to the first axis and extend from the first reference point around a second axis that is (i) on the beam axis, (ii) includes a second reference point being apart from the first reference point, and (iii) has a direction different from that of the first axis. 20. A particle beam therapy system comprising: an irradiation nozzle that scans a particle beam supplied from an accelerator, by use of two electromagnets whose scanning directions are different from each other, and that irradiates the particle beam in such a way as to enlarge an irradiation field; anda multi-leaf collimator according to claim 19, disposed in a particle beam irradiated from the irradiation nozzle, wherein the multi-leaf collimator is disposed in such a way that the first axis coincides with the scanning axis of one of the two electromagnets and the second axis coincides with the scanning axis of the other one of the two electromagnets. 21. A treatment planning apparatus comprising: a three-dimensional data generation unit for generating three-dimensional data from image data on an irradiation subject;an irradiation condition setting unit that sets an irradiation condition, based on the generated three-dimensional data; anda control data generation unit that generates control data for controlling leaf driving for the multi-leaf collimator in the particle beam therapy system according to claim 20, based on the set irradiation condition, wherein the three-dimensional data generation unit generates the three-dimensional data by utilizing at least a beam deflection angle with respect to the first axis and a beam deflection angle with respect to the second axis.
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