Radiotherapy device and control driving method thereof

Abstract

A radiotherapy device and a control driving method thereof are provided. The radiotherapy device includes a radiation source apparatus, the radiation source apparatus includes a plurality of radiation sources and a collimator, and source points of the plurality of radiation sources are within a preset included angle range in a longitude direction. The preset included angle range is 5 to 60 degrees. The collimator is provided with a plurality of collimating hole groups, and an included angle of each of the collimating hole groups in the longitude direction is within the preset included angle range; and each of the collimating hole groups includes a plurality of collimating holes, and radiation beams emitted from the plurality of radiation sources intersect at a common focus after passing through the collimating holes of the collimating hole groups.

What is claimed is: 
     
         1 . A radiotherapy device, comprising a radiation source apparatus, wherein the radiation source apparatus comprises a plurality of radiation sources and a collimator, source points of the plurality of radiation sources are within a preset included angle range in a longitude direction, the collimator is provided with a plurality of collimating hole groups, and an included angle of each of the collimating hole groups in the longitude direction is within the preset included angle range, wherein the preset included angle range is  5  to 60 degrees; and
 each of the collimating hole groups comprises a plurality of collimating holes, and radiation beams emitted from the plurality of radiation sources intersect at a common focus after passing through the collimating holes of the collimating hole groups. 
 
     
     
         2 . The radiotherapy device according to  claim 1 , further comprising: a driving apparatus configured to drive the radiation source apparatus to move. 
     
     
         3 . The radiotherapy device according to  claim 1 , wherein the radiation beams are γ-ray beams or X-ray beams. 
     
     
         4 . The radiotherapy device according to  claim 1 , wherein the radiation sources are γ-radioactive sources, the radiation source apparatus comprises a source carrier, the source carrier is provided with a plurality of γ-radioactive sources, and the plurality of γ-radioactive sources are distributed within the preset included angle range in the longitude direction. 
     
     
         5 . The radiotherapy device according to  claim 4 , wherein the collimator further comprises a shielding site configured to shield the radiation beams of the plurality of radiation sources. 
     
     
         6 . The radiotherapy device according to  claim 4 , further comprising a switch body, wherein the switch body is located between the source carrier and the collimator; and
 the switch body is provided with at least two sets of hole sites corresponding to the radiation sources, wherein one set of the hole sites are all through holes, and each of the rest sets of the hole sites comprises through holes and shielding sites.   
     
     
         7 . The radiotherapy device according to  claim 4 , wherein a space between two adjacent collimating holes in a same collimating hole group is greater than a size of the radiation source in the longitude direction. 
     
     
         8 . The radiotherapy device according to  claim 1 , wherein the radiation beams are the X-ray beams, and the radiotherapy device comprises one or a plurality of X-ray accelerating systems; the one X-ray accelerating system emits a plurality of X-ray beams in a beam emission angle range; or the plurality of X-ray accelerating systems emit a plurality of X-ray beams in the beam emission angle range. 
     
     
         9 . A control driving method for a radiotherapy device, the radiotherapy device comprising a plurality of radiation sources, source points of the plurality of radiation sources being within a preset included angle range in a longitude direction; the method comprising:
 acquiring at least one beam emission angle range; and   driving the radiotherapy device to emit radiation beams in the beam emission angle range, the radiation beams intersecting at a common focus.   
     
     
         10 . The control driving method according to  claim 9 , wherein the radiation sources are γ-radioactive sources, the radiotherapy device comprises a source carrier and a collimator, the source carrier is provided with a plurality of γ-radioactive sources, the plurality of γ-radioactive sources are distributed within the preset included angle range in the longitude direction, the collimator is provided with a plurality of collimating hole groups, and each of the collimating hole groups is distributed within the preset included angle range in the longitude direction; and
 the driving the radiotherapy device to emit radiation beams in the beam emission angle range comprises: driving the radiotherapy device such that radiation beams emitted from the plurality of γ-radioactive sources are emitted after passing through collimating holes of the collimator. 
 
     
     
         11 . The control driving method according to  claim 9 , wherein the radiation sources are γ-radioactive sources, the radiotherapy device comprises a source carrier and a collimator, the source carrier is provided with a plurality of γ-radioactive sources, the plurality of γ-radioactive sources are distributed within the preset included angle range in the longitude direction, the collimator is provided with a plurality of collimating hole groups, and each of the collimating hole groups is distributed within the preset included angle range in the longitude direction; and
 the driving the radiotherapy device such that no radiation beam from the radiation sources within the protection angle range is emitted specifically comprises: driving the radiotherapy device such that the radiation beams emitted from the plurality of γ-radioactive sources are shielded by the collimator. 
 
     
     
         12 . The control driving method according to  claim 11 , wherein the radiotherapy device further comprises a source switch body, and the driving the radiotherapy device such that no radiation beam from the radiation sources within the protection angle range is emitted comprises: driving the radiotherapy device such that the radiation beams emitted from the plurality of γ-radioactive sources are shielded by the source switch body. 
     
     
         13 . The control driving method according to  claim 12 , wherein the source switch body is provided on the collimator. 
     
     
         14 . The control driving method according to  claim 10 , wherein the radiotherapy device further comprises a switch body, the switch body is located between the source carrier and the collimator, the switch body is provided with at least two sets of hole sites corresponding to the γ-radioactive sources, wherein one set of hole sites are all through holes, and each of the rest sets of the hole sites comprises through holes and shielding sites; and
 the method further comprises: driving the switch body such that a part of the radiation beams emitted from the plurality of γ-radioactive sources are shielded by the shielding sites of the switch body. 
 
     
     
         15 . The control driving method according to  claim 11 , wherein a space between two adjacent collimating holes in a same collimating hole group is greater than a size of the γ-radioactive source in the longitude direction; and
 the driving the radiotherapy device such that no radiation beam from the radiation sources within the protection angle range is emitted comprises: driving the radiotherapy device such that the plurality of γ-radioactive sources is misaligned with the collimating holes, wherein a part of the radiation beams emitted from the γ-radioactive sources are shielded by edge regions of the collimating hole group, and the rest of the radiation beams emitted from the γ-radioactive sources are shielded by a space region between the collimating holes. 
 
     
     
         16 . The control driving method according to  claim 9 , wherein the radiation beams are the X-ray beams, and the radiotherapy device comprises one or a plurality of X-ray accelerating systems; and
 the driving the radiotherapy device to emit radiation beams in the beam emission angle range specifically comprises: driving the one X-ray accelerating system to emit a plurality of X-ray beams in the beam emission angle range; or driving the plurality of X-ray accelerating systems to emit a plurality of X-ray beams in the beam emission angle range.   
     
     
         17 . The control driving method according to  claim 10 , wherein the radiation beams are the X-ray beams, and the radiotherapy device comprises one or a plurality of X-ray accelerating systems; and
 the driving the radiotherapy device such that no radiation beam from the radiation sources within the protection angle range is emitted comprises:   switching off all or a part of X-ray beams from the one X-ray accelerating system; or switching off all or a part of the plurality of X-ray accelerating systems.   
     
     
         18 . The control driving method according to  claim 10 , wherein the common focus is located outside an end surface of the radiation source apparatus. 
     
     
         19 . The control driving method according to  claim 18 , wherein the radiotherapy device further comprises an imaging apparatus, and the common focus is located within an imaging region of the imaging apparatus; the method further comprising:
 controlling the imaging apparatus to acquire an image of a patient; and   determining the beam emission angle range based on the image of the patient.   
     
     
         20 . The control driving method according to  claim 18 , wherein the radiotherapy device further comprises an imaging apparatus, and the common focus is located within an imaging region of the imaging apparatus; the method further comprising:
 controlling the imaging apparatus to acquire an image of a patient; and   determining the protection angle range based on the image of the patient.