Method and system of controlling multi-leaf collimator

Abstract

A method and system of controlling a multi-leaf collimator, wherein steps of the method includes: receiving treatment data, and the treatment data includes position information of N treatment points, conformal position information of N treatment points and radiation field shapes of N treatment points; controlling a treatment head to a conformal position of a first treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the first treatment point so as to start a treatment of the first treatment point; controlling the treatment head to a conformal position of a Kth treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the Kth treatment point so as to start a treatment of the Kth treatment point; carrying out the described operations repeatedly until the conformation of the radiation field shape and the treatment of all treatment points are completed.

What is claimed is: 
     
         1 . A method of controlling a multi-leaf collimator, which is applied to a radiotherapy device, the radiotherapy device including a treatment head including a radiation source and a multi-leaf collimator, wherein the method comprises:
 controlling the multi-leaf collimator to conform to a radiation field shape corresponding to a position of a first treatment point according to received treatment data, so as to start a treatment of the first treatment point, the treatment data including conformal position information of N treatment points and radiation field shapes corresponding to positions of N treatment points, wherein N is a positive integer greater than 1;   controlling the multi-leaf collimator to conform to a radiation field shape corresponding to a position of a Kth treatment point, so as to start a treatment of the Kth treatment point, wherein 2≤K≤N, K is a positive integer; and   carrying out above operations repeatedly until treatment of all treatment points is completed.   
     
     
         2 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprises:
 controlling the multi-leaf collimator to be initialized and move to a zero position.   
     
     
         3 . The method of controlling a multi-leaf collimator according to  claim 2 , wherein the zero position is a position in which two sets of leaves of the multi-leaf collimator are separated, or a position in which the two sets of leaves of the multi-leaf collimator are closed. 
     
     
         4 . The method of controlling a multi-leaf collimator according to  claim 1 , wherein before controlling the multi-leaf collimator to conform to the radiation field shape corresponding to the position of the first treatment point, so as to start the treatment of the first treatment point, the method further comprises:
 controlling the treatment head to rotate to a conformal position of the first treatment point.   
     
     
         5 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 controlling the treatment head to rotate to a conformal position of the Kth treatment point after a treatment of a (K-1)th treatment point is completed, so as to start the treatment of the Kth treatment point.   
     
     
         6 . The method of controlling a multi-leaf collimator according to  claim 5 , wherein
 the treatment head rotates to the conformal position of the Kth treatment point and controls the multi-leaf collimator to conform to the radiation field shape corresponding to the position of the Kth treatment point; or   the treatment head rotates to the conformal position of the Kth treatment point and controls the multi-leaf collimator to start conforming to the radiation field shape corresponding to the position of the Kth treatment point.   
     
     
         7 . The method of controlling a multi-leaf collimator according to  claim 1 , wherein starting the treatment of the Kth treatment point includes:
 controlling the multi-leaf collimator to stop conforming, so as to wait for the radiation source of the treatment head to complete a treatment of the Kth treatment point; or   controlling two sets of leaves in the multi-leaf collimator to move.   
     
     
         8 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 monitoring in real time whether a position of the treatment head is at a conformal position of the first treatment point or the Kth treatment point.   
     
     
         9 . The method of controlling a multi-leaf collimator according to  claim 7 , wherein while controlling the multi-leaf collimator to stop conforming, the method further comprises:
 controlling two sets of leaves in the multi-leaf collimator to remain stationary.   
     
     
         10 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 controlling the multi-leaf collimator of the treatment head to complete a conformation of the radiation field shape corresponding to the position of the Kth treatment point before or at the time the treatment head is controlled to rotate to the position of the Kth treatment point.   
     
     
         11 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 determining whether the Kth treatment point is the last treatment point.   
     
     
         12 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 monitoring whether a position of the treatment head is at a position of any one of all treatment points.   
     
     
         13 . The method of controlling a multi-leaf collimator according to  claim 1 , further comprising:
 after the multi-leaf collimator conforms to a radiation field shape corresponding to a position of a Mth treatment point, controlling leaves of the multi-leaf collimator to remain stationary or move during a treatment process of the Mth treatment point, wherein M is greater than or equal to 1, and less than or equal to N (1≤M≤N), and M is a positive integer.   
     
     
         14 . A system of controlling a multi-leaf collimator, comprising a processor, wherein the processor is configured to:
 control the multi-leaf collimator to conform to a radiation field shape corresponding to a position of a first treatment point according to received treatment data, so as to start a treatment of the first treatment point, the treatment data including conformal position information of N treatment points and radiation field shapes corresponding to positions of N treatment points, wherein N is a positive integer greater than 1;   control the multi-leaf collimator to conform to a radiation field shape corresponding to a position of a Kth treatment point, so as to start a treatment of the Kth treatment point, wherein K is greater than or equal to 2, and less than or equal to N (2≤K≤N), and K is a positive integer; and   carry out above operations repeatedly until treatment of all treatment points is completed.   
     
     
         15 . The system of controlling a multi-leaf collimator according to  claim 14 , wherein the processor is configured to:
 control the multi-leaf collimator to be initialized and move to a zero position.   
     
     
         16 . The system of controlling a multi-leaf collimator according to  claim 14 , wherein before controlling the multi-leaf collimator to conform to the radiation field shape corresponding to the position of the first treatment point, so as to start the treatment of the first treatment point, the processor is configured to:
 control the treatment head to rotate to a conformal position of the first treatment point.   
     
     
         17 . The system of controlling a multi-leaf collimator according to  claim 14 , wherein the processor is also configured to:
 control the treatment head to rotate to a conformal position of the Kth treatment point after a treatment of a (K-1)th treatment point is completed, so as to start the treatment of the Kth treatment point, wherein starting the treatment of the Kth treatment point includes:   controlling the multi-leaf collimator to stop conforming, so as to wait for a radiation source of the treatment head to complete a treatment of the Kth treatment point; or   controlling two sets of leaves in the multi-leaf collimator to move.   
     
     
         18 . The system of controlling a multi-leaf collimator according to  claim 14 , wherein the processor is also configured to:
 determine whether the Kth treatment point is the last treatment point.   
     
     
         19 . The system of controlling a multi-leaf collimator according to  claim 14 , wherein the processor is also configured to:
 monitor whether a position of the treatment head is at a position of any one of all treatment points.   
     
     
         20 . A non-transitory computer readable storage medium storing executable instructions, wherein in a case where the executable instructions are executed by a system of controlling the multi-leaf collimator, the executable instructions make the system of controlling the multi-leaf collimator perform the method according to  claim 1 .