IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0676063
(2003-10-02)
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우선권정보 |
JP-0021964 (2001-01-30) |
발명자
/ 주소 |
- Kato, Kohei
- Akiyama, Hiroshi
- Yanagisawa, Masaki
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
94 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 apparatus 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 plate
1. A multi-leaf collimator apparatus 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 a leaf plate moving device for moving said leaf plates by engaging with said plurality of leaf plates and transmitting a driving force to said engaged leaf plates, a driving force transmitting/cutoff device having a first motion moving each of said plurality of leaf plates to positions where each of said leaf plates engages with said leaf plate moving device and a second motion detaching each of said leaf plates from said leaf plate moving device, and a control device for engaging said plurality of leaf plates with said leaf plate moving device by controlling said driving force transmitting/cutoff device and canceling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said driving force transmitting/cutoff device. 2. A multi-leaf collimator apparatus according to claim 1, further comprising a position detecting device for detecting positions of said plurality of leaf plates, whereinsaid control device comprising a memory device for memorizing predetermined positions for said plurality of leaf plates respectively, inputting position information of said plurality of leaf plates detected by said position detecting device, and detaching a leaf plate from leaf plate moving device, at the position of which said position information corresponds to a predetermined position by controlling said driving force transmitting/cutoff device. 3. A multi-leaf collimator apparatus according to claim 2, wherein said predetermined position for said plurality of leaf plates is information memorized in a database accompanied with a remedy scheduling unit. 4. A multi-leaf collimator apparatus according to claim 1, wherein said leaf plate moving device is a rotation device. 5. A multi-leaf collimator apparatus 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 on, 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, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device for moving said leaf plates by engaging with said plurality of leaf plates, a transmitting/cutoff device corresponding to said plurality of leaf plates which engages and detaches said leaf plates to enable said leaf plate moving device to move freely, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said transmitting/cutoff device and cancelling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said transmitting/cutoff device. 6. A multi-leaf collimator apparatus according to claim 5, further comprising a position detecting device for detecting positions of said plurality of leaf plates, whereinsaid control device comprising a memory device for memorizing predetermined positions for said plur ality of leaf plates respectively, inputting position information of said plurality of leaf plates detected by said position detecting device, and detaching a leaf plate from leaf plate moving device, at the position of which said position information corresponds to a predetermined position by controlling said transmitting/cutoff device. 7. A multi-leaf collimator apparatus according to claim 6, wherein said predetermined position for said plurality of leaf plates is information memorized in a database accompanied with a remedy scheduling unit. 8. A multi-leaf collimator apparatus according to claim 5, wherein said leaf plate moving device is a rotation device. 9. 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, said 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, whereineach of said leaf plate driving bodies comprises a leaf plate moving device which moves said leaf plates by engaging with said plurality of leaf plates and transmitting driving force to said engaged leaf plates, a driving force transmitting/cutoff device having a first motion moving each of said plurality of leaf plates to positions where each of said leaf plates engages with said leaf plate moving device and second motion detaching each of said leaf plates from said leaf plate moving device, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said driving force transmitting/cutoff device and canceling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said driving force transmitting/cutoff device. 10. A medical system according to claim 9, wherein said leaf plate moving device is a rotation device. 11. A medical system comprising:an accelerator; andan irradiator having a collimator device through which a radiation beam emitted from said accelerator passes, and irradiating the beam having passed said collimator device, wherein:said collimator device 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, said plurality of leaf plate of said leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device which moves said leaf plates by engaging with said plurality of leaf plates, a transmitting/cutoff device corresponding to said plurality of leaf plates which engages and detaches said leaf plates to enable said leaf plate moving device to move freely, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said transmitting/cutoff device and cancelling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said transmitting/cutoff device. 12. A medical system according to claim 11, further comprising a position detecting device for detecting positions of said plurality of leaf plates, whereinsaid control device comprising a memory device which memorizes predetermined positio ns for said plurality of leaf plates respectively, inputs position information of said plurality of leaf plates detected by said position detecting device, and detaches a leaf plate from said leaf plate moving device, at the position of which said position information corresponds to a predetermined position by controlling said transmitting/cutoff device. 13. A medical system according to claim 12, wherein said predetermined position for said plurality of leaf plates is information memorized in a database accompanied with a remedy scheduling unit. 14. A medical system according to claim 11, wherein said leaf plate moving device is a rotation device. 15. A multi-leaf collimator apparatus 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, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device for moving said leaf plates by engaging with said plurality of leaf plates and transmitting a driving force to said engaged leaf plates, a driving force transmitting/cutoff device having a first motion moving each of said plurality of leaf plates to positions where each of said leaf plates engages with said leaf plate moving device in another direction crossing a moving direction of said leaf plate and a second motion detaching each of said leaf plates from said leaf plate moving device by moving in said another direction, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said driving force transmitting/cutoff device and cancelling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said driving force transmitting/cutoff device. 16. A multi-leaf collimator apparatus 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, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device which moves said leaf plates by engaging with said plurality of leaf plates, a transmitting/cutoff device corresponding to said plurality of leaf plates which engages and detaches said leaf to enable said leaf plate moving device to move freely by moving said corresponding leaf plate in another direction crossing a moving direction of said leaf plate, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said transmitting/cutoff device and canceling engagements between a leaf plate arrived at a predetermined position in said plurality of leaf plates and said leaf plate moving device by controlling said transmitting/cutoff device. 17. A multi-leaf collimator apparatus according to claim 16, further comprising a position detecting device for detecting positions of said plurality of leaf plates, whereinsaid control device comprising a memory device which memorizes predetermined positions for said plurality of leaf plates respectively, inputs position information of said plurality of leaf p lates detected by said position detecting device, and detaches a leaf plate from leaf plate moving device, at the position of which said position information corresponds to a predetermined position by controlling said transmitting/cutoff device. 18. A multi-leaf collimator apparatus according to claim 17, wherein said predetermined position for said plurality of leaf plates is information memorized in a database accompanied with a remedy scheduling unit. 19. A multi-leaf collimator apparatus according to claim 16, wherein said leaf plate moving device is a rotation device. 20. A multi-leaf collimator apparatus according to claim 16, wherein said leaf plate moving device comprises a holding device stopping a position thereof by attaching to said leaf plate. 21. A medical system comprising:an accelerator; andan irradiator having a collimator device through which a radiation beam emitted form said accelerator passes, and irradiating the beam having passed said collimator device, wherein:said collimator device 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, said 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, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device for moving said leaf plates by engaging with said plurality of leaf plates, a transmitting/cutoff device corresponding to said plurality of leaf plates respectively which engages and detaches corresponding leaf plate for said leaf plate moving device by moving said corresponding leaf plate in another direction crossing a moving direction of said leaf plate, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said transmitting/cutoff device and cancelling engagements between a leaf plate arrived at a predetermined position in said plural leaf plates and said leaf plate moving device by controlling said transmitting/cutoff device. 22. A medical system comprising:an accelerator; andan irradiator having a collimator device through which a radiation beam emitted form said accelerator passes, and irradiating the beam having passed said collimator device, wherein:said collimator device 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, said plurality of leaf plates of said leaf plate driving bodies being disposed in an opposing relation to form an irradiation field of the radiation beam between the opposing leaf plates, whereineach of said first and second leaf plate driving bodies comprises a leaf plate moving device which moves said leaf plates by engaging with said plurality of leaf plates, a transmitting/cutoff device corresponding to said plurality of leaf plates which engages and detaches a corresponding leaf plate for said leaf plate moving device by moving said corresponding leaf plate in another direction crossing a moving direction of said leaf plate, and a control device which engages said plurality of leaf plates with said leaf plate moving device by controlling said transmitting/cutoff device and cancelling engagements between a leaf plate arrived at a predetermined position in said plural leaf plates and said leaf plate moving device by controlling said transmitting/cutoff device. 23. A medical system according to claim 22, further comprising a position detecting device which detects positions of said plural leaf plates, whereinsaid control device comprising a memory device which memoriz es predetermined positions for said plurality of leaf plates respectively, inputs position information of said plurality of leaf plates detected by said position detecting device, and detaches a leaf plate from said leaf plate moving device, at the position of which said position information corresponds to a predetermined position by controlling said transmitting/cutoff device. 24. A medical system according to claim 23, wherein said predetermined position for said plurality of leaf plates is information memorized in a database accompanied with a remedy scheduling unit. 25. A medical system according to claim 22, wherein said leaf plate moving device is a rotation device. 26. A medical system according to claim 22, wherein said leaf plate moving device comprises a holding device stopping a position thereof by attaching to said leaf plate.
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