Radiation therapeutic head, collimator assembly, and control method of radiotherapeutic equipment

Abstract

A radiation therapeutic head, a collimator assembly, and a control method of a radiotherapeutic equipment are provided. The therapeutic head includes: a source carrier; first radiation sources for focusing therapy and a second radiation source for conformal therapy that are disposed on the source carrier; a switch body located on an emitting side of the first and second radiation sources and provided with through holes therein, the switch body being configured to control alignment of the through holes with the first and second radiation sources to allow the emission of rays from the first and second radiation sources; and a collimator assembly, the collimator assembly further includes a carrier; a focusing collimator and a multi-leaf collimator disposed on the source carrier.

What is claim is: 
     
         1 . A radiation therapeutic head for multi-source focusing therapy and conformal intensity-modulated therapy, the therapeutic head comprising:
 a source carrier;   first radiation sources focusing therapy and a second radiation source for conformal therapy that are disposed on the source carrier;   a switch body located on an emitting side of the first and second radiation sources and provided with through holes therein, the switch body being configured to control alignment of the through holes with the first and second radiation sources to allow the emission of rays from the first and second radiation sources; and   a collimator assembly, the collimator assembly further comprising: a carrier; and a focusing collimator and a multi-leaf collimator disposed on the carrier.   
     
     
         2 . The therapeutic head according to  claim 1 , wherein the first radiation sources for focusing therapy are disposed on two opposite sides of the source carrier, and the second radiation source for conformal therapy is disposed in a middle of the source carrier. 
     
     
         3 . The therapeutic head according to  claim 1 , wherein the therapeutic head is configured to be rotatable about an axis, and the first radiation sources for focusing therapy are distributed in a sector region with an angle range of 26° to 60° on a radial cross section of the axis. 
     
     
         4 . The therapeutic head according to  claim 1 , wherein the therapeutic head is configured to be rotatable about an axis, and the first radiation sources for focusing therapy are distributed on both sides of the second radiation source for conformal therapy at angles of 26° to 60° on an axial cross section of the axis 
     
     
         5 . The therapeutic head according to  claim 1 , wherein the through holes comprise first through holes corresponding to the first radiation sources for focusing therapy, and a second through hole corresponding to the second radiation source for conformal therapy, and the second through hole is configured to be deviated from a symmetry line of the first through holes. 
     
     
         6 . The therapeutic head according to  claim 1 , wherein the collimator assembly is provided with:
 multiple groups of collimating channels for collimating focusing rays emitted by the first radiation sources for focusing therapy;   and a hole for mounting the multi-leaf collimator.   
     
     
         7 . The therapeutic head according to  claim 1 , wherein the therapeutic head further comprises a shielding body located outside the source carrier for shielding the radiation rays of the first and second radiation sources. 
     
     
         8 . The therapeutic head according to  claim 1 , wherein the therapeutic head further comprises a shielding door located on a side of the first and second radiation sources facing away from the source carrier for controllably shielding the rays of the first and second radiation sources. 
     
     
         9 . The therapeutic head according to  claim 8 , wherein the shielding door has two layers, and the shielding door is configured to be opened or closed in directions perpendicular to each other. 
     
     
         10 . The therapeutic head according to  claim 1 , wherein the therapeutic head further comprises a switch body driving member, the switch body is movable in a radial direction relative to the source carrier under the driving of the switch body driving member, and/or the collimator assembly driving member is configured to drive the focusing collimator and the multi-leaf collimator to move. 
     
     
         11 . A collimator assembly, comprising:
 a carrier; and   a focusing collimator and a multi-leaf collimator disposed on the carrier.   
     
     
         12 . The collimator assembly according to  claim 11 , wherein the collimator assembly is provided with:
 multiple groups of collimating channels for collimating focusing rays emitted by first radiation sources for focusing therapy;   and a hole for mounting the multi-leaf collimator.   
     
     
         13 . The collimator assembly according to  claim 11 , wherein the collimator assembly is adapted to be attached to a therapeutic head that is rotatable about an axis, and the first radiation sources for focusing therapy are distributed in a sector region with an angle range of 26° to 60° on a radial cross section of the axis. 
     
     
         14 . The collimator assembly according to  claim 11 , wherein two rows of the first radiation sources for focusing therapy are disposed on two opposite sides of the source carrier. 
     
     
         15 . The collimator assembly according to  claim 11 , wherein the collimator assembly is adapted to be attached to a therapeutic head that is rotatable about an axis, and the radiation sources for focusing therapy are distributed on both sides of the radiation source for conformal therapy at angles of 26° to 60° on an axial cross section of the axis. 
     
     
         16 . A control method of a radiotherapeutic equipment comprising:
 acquiring a patient's therapy plan, the radiotherapeutic equipment comprising a therapeutic head, and the therapeutic head further comprises first radiation sources for focusing therapy and a second radiation source for conformal therapy, and the therapy plan comprising: performing radiotherapy with multi-source focusing or conformal intensity modulation, or performing radiotherapy with both multi-source focusing and conformal intensity modulation successively; and   controlling the therapeutic head according to the therapy plan to carry out treatment of the patient.   
     
     
         17 . The control method according to  claim 16 , further comprising:
 when the therapy plan is to perform radiotherapy with multi-source focusing, the radiotherapeutic equipment performs the following operations:   moving a switch body of the radiotherapeutic equipment to a focusing source opening position;   opening a shielding door of the radiotherapy equipment; and   moving a collimator of the radiotherapeutic equipment to select appropriate collimating holes for focusing radiotherapy.   
     
     
         18 . The control method according to  claim 16 , comprising:
 when the therapy plan is to perform radiotherapy with conformal intensity modulation, the radiotherapeutic equipment performs the following operations:   moving a switch body of the radiotherapeutic equipment to a conformable source opening position;   opening a shielding door of the radiotherapeutic equipment; and   driving a multi-leaf collimator of the radiotherapeutic equipment, and forming a corresponding radiation field according to the plan to perform conformal therapy of tumors.   
     
     
         19 . The control method according to  claim 16 , comprising:
 when the therapy plan is to perform radiotherapy with both multi-source focusing and conformal intensity modulation successively, the radiotherapeutic equipment performs the following operations:   moving a switch body of the radiotherapeutic equipment to a focusing source opening position;   opening a shielding door of the radiotherapeutic equipment;   moving a collimator of the radiotherapeutic equipment to select appropriate collimating holes for focusing radiotherapy;   moving the switch body to a conformable source opening position;   opening the shielding door; and   controlling a multi-leaf collimator, and forming a corresponding radiation field according to the therapy plan to perform conformal therapy of tumors.   
     
     
         20 . The control method according to  claim 16 , comprising:
 when the therapy plan is to perform radiotherapy with both multi-source focusing and conformal intensity modulation successively, the radiotherapeutic equipment performs the following operations:   moving a switch body of the radiotherapeutic equipment to a conformable source opening position;   opening a shielding door of the radiotherapeutic equipment;   controlling a multi-leaf collimator of the radiotherapeutic equipment, and forming a corresponding radiation field according to the therapy plan to perform conformal therapy of tumors;   moving the switch body to a focusing source opening position;   opening the shielding door; and   moving a collimator to select appropriate collimating holes for focusing radiotherapy.