IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0676059
(2003-10-02)
|
우선권정보 |
JP-0021964 (2001-01-30) |
발명자
/ 주소 |
- Kato, Kohei
- Akiyama, Hiroshi
- Yanagisawa, Masaki
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
93 인용 특허 :
3 |
초록
▼
The invention is intended to shorten a positioning time required for forming an irradiation area with high accuracy using a number of leaf plates, and to reduce physical and mental burdens imposed on patients. A multi-leaf collimator comprises leaf plate driving body each including a plurality of mo
The invention is intended to shorten a positioning time required for forming an irradiation area with high accuracy using a number of leaf plates, and to reduce physical and mental burdens imposed on patients. A multi-leaf collimator comprises leaf plate driving body each including a plurality of movable leaf plates and provided respectively on one side and the other side, the plurality of leaf plates of the leaf plate driver on one side and the plurality of leaf plates of the leaf plate driver on the other side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates. Each of the leaf plate driving body includes a motor provided in common to the plurality of leaf plates. Driving force of the motor can be transmitted to the plurality of leaf plates at the same time through a pinion gear, upper and lower air cylinders, and upper and lower guides. Also, the driving force can be cut off selectively for each leaf plate.
대표청구항
▼
1. A multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plu
1. A multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said leaf plate driving body on the first side and the plurality of leaf plates of said leaf plate driving body on the second side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates, wherein:each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates along one direction by engaging with a gear portion provided respectively at each of said plurality of leaf plates, and a driving force transmitting/cutoff device for transmitting a driving force of said rotating device to said plurality of leaf plates at the same time during a certain period by moving said plurality of gear portions along a direction substantially perpendicular to said one direction and engaging them with said rotating device and cutting off said driving force to a selected one of said plurality of leaf plates by disengaging said gear portion of said selected leaf plate from said rotating device. 2. A multi-leaf collimator according to claim 1, wherein each of said first and second leaf plate driving bodies further comprises a holding device for abutting against the leaf plates to hold the leaf plates in stationary positions. 3. A multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said leaf plate driving body on the first side and the plurality of leaf plates of said leaf plate driving body on the second side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates, wherein:each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates, and a plurality of engaging/disengaging devices provided in a one-to-one relation to the plurality of leaf plates for selectively engaging and disengaging a corresponding leaf plate with and from said rotating device by moving said gear portion of said corresponding leaf plate along a direction substantially perpendicular to said one direction. 4. A multi-leaf collimator according to claim 3, wherein each of said first and second leaf plate driving bodies further comprises a holding device for abutting against the leaf plates to hold the leaf plates in stationary positions. 5. A medical system comprising:an accelerator; andan irradiator having a collimator through which a radiation beam emitted from said accelerator passes, and irradiating the beam having passed said collimator, wherein:said collimator comprises a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said first and second leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates,each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates along one direction by engaging with a gear portion provided respectively at each of said plurality of leaf plates, and a driving force transmitting/cutoff dev ice for transmitting a driving force of said rotating device to said plurality of leaf plates at the same time during a certain period by moving said plurality of gear portions along a direction substantially perpendicular to said one direction and engaging them with said rotating device and cutting off said driving force to a selected one of said plurality of leaf plates by disengaging said gear portion of said selected leaf plate from said rotating device. 6. A medical system according to claim 5, further comprising a control device for controlling said rotating device and said transmitting/cutoff device. 7. A medical system comprising:an accelerator; andan irradiator having a collimator through which a radiation beam emitted from said accelerator passes, and irradiating the beam having passed said collimator, wherein:said collimator comprises a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said first and second leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates,each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates, and a plurality of engaging/disengaging devices provided in a one-to-one relation to the plurality of leaf plates for selectively engaging and disengaging a corresponding leaf plate with and from said rotating device by moving said gear portion of said corresponding leaf plate along a direction substantially perpendicular to said one direction. 8. A medical system according to claim 7, further comprising a control device for controlling said rotating device and said engaging/disengaging device. 9. A multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said leaf plate driving body on the first side and the plurality of leaf plates of said leaf plate driving body on the second side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates, wherein:each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates, a plurality of guide members provided in a one-to-one relation to the plurality of leaf plates for holding said leaf plate slidably along said one direction, and a guide member moving device for moving said guide member along a direction substantially perpendicular to said one direction for engaging and disengaging said gear portion with and from said rotating device. 10. A multi-leaf collimator according to claim 9, wherein each of said first and second leaf plate driving bodies further comprise a holding device for abutting against the leaf plates to hold the leaf plates in stationary positions. 11. A multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said leaf plate driving body on the first side and the plurality of leaf plates of said leaf plate driving body on the second side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates, wherein:each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates,each of said plurality of leaf plates provided at each of said first and second plate driving bodies comprises an expansion/contraction member for expanding and contracting along a direction substantially perpendicular to said one direction for engaging and disengaging said gear portion with and from said rotating device, andsaid gear portion is disposed at said expansion/contraction member. 12. A multi-leaf collimator according to claim 11, wherein each of said first and second leaf plate driving bodies further comprises a holding device for abutting against the leaf plates to hold the leaf plates in stationary positions. 13. A medical system comprising:an accelerator; andan irradiator having a collimator through which a radiation beam emitted from said accelerator passes, and irradiating the beam having passed said collimator, wherein:said collimator comprises a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said first and second leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates,each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates, a plurality of guide members provided in a one-to-one relation to the plurality of leaf plates for holding said leaf plate slidably along said one direction, and a guide member moving device for moving said guide member along a direction substantially perpendicular to said one direction for engaging and disengaging said gear portion with and from said rotating device. 14. A medical system according to claim 13, further comprising a control device for controlling said rotating device and said guide member moving device. 15. A medical system comprising:an accelerator; andan irradiator having a collimator through which a radiation beam emitted from said accelerator passes, and irradiating the beam having passed said collimator, wherein:said collimator comprises a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates, the plurality of leaf plates of said first and second leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates,each of said first and second leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates together along one direction during a certain period by engaging with a gear portion provided respectively at each of said plurality of leaf plates,each of said plurality of leaf plates provided at each of said leaf plate driving bodies comprises an expansion/contraction member for expanding and contracting along a direction substantially perpendicular to said one direction for engaging and disengaging said gear portion with and from said rotating device, andsaid gear portion is disposed at said expansion/contraction member.
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