# US 11,077,321 B2 · Method and system of controlling multi-leaf collimator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,321 B2 - Document ID: US11077321B2 - Status: Granted - Kind: B2 - Application number: 16/598,864 - Filed: 2019-10-10 - Published: 2020-02-06 - Granted: 2021-08-03 - Earliest claimed: 2017-04-10 - Assignees: Our United Corporation - Applicants: Our United Corporation - Inventors: Jinsheng Li; Mengmeng Zhang - Web page: https://patentgrep.com/patent/US11077321B2 ## CPC - A61N 5/1048: {Monitoring, verifying, controlling systems and methods} - A61N 5/1045: {using a multi-leaf collimator, e.g. for intensity modulated radiation therapy or IMRT} - A61N 5/1075: {for testing, calibrating, or quality assurance of the radiation treatment apparatus} - A61N 2005/1074: {Details of the control system, e.g. user interfaces} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## 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. ## Claims ### Claim 1 A method of controlling a multi-leaf collimator, comprising: receiving treatment data, the treatment data including position information of N treatment points, conformal position information of N treatment points and radiation field shapes of N treatment points, wherein N is a positive integer greater than 1; controlling a treatment head including the multi-leaf collimator to rotate 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; wherein the conformal position of the first treatment point is between a position of a last treatment point and a position of the first treatment point, or, the conformal position of the first treatment point is at the position of the first treatment point; controlling the treatment head including the multi-leaf collimator to rotate 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; wherein 2≤K≤N, K is a positive integer; carrying out the above operations repeatedly until conformation of the radiation field shape and treatment of all treatment points are completed; and wherein the conformal position of the Kth treatment point is between a position of a (K-1)th treatment point and a position of the Kth treatment point. ### Claim 2 (depends on 1) The method of controlling a multi-leaf collimator according to claim 1, wherein, before receiving the treatment data, the method further includes: controlling the multi-leaf collimator to be initialized and to perform self-test, and controlling two sets of leaves of the multi-leaf collimator to move to a zero position. ### Claim 3 (depends on 2) The method of controlling a multi-leaf collimator according to claim 2, wherein the zero position is a position in which the 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. ### Claim 4 (depends on 1) The method of controlling a multi-leaf collimator according to claim 1, wherein the treatment data further include a treatment sequence of the N treatment points, a rotation angle of a roller during the treatment of each of the N treatment points, and treatment time for treating each of the N treatment points; and the rotation angle of the roller is an angle formed between a connection line from the treatment head at a current position to a center of the roller when treating a current treatment point and a connection line from the treatment head at a initial position to the center of the roller. ### Claim 5 (depends on 1) The method of controlling a multi-leaf collimator according to claim 1, wherein, after controlling the multi-leaf collimator to complete the conformation of the radiation field shape of the (K-1)th treatment point, and before controlling the multi-leaf collimator to begin to conform the radiation field shape of the Kth treatment point, the method further comprises: 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 (K-1)th treatment point. ### Claim 6 (depends on 5) The method of controlling a multi-leaf collimator according to claim 5, further comprising: monitoring in real time whether the position of the treatment head is at a conformal position of the first treatment point or the Kth treatment point. ### Claim 7 (depends on 5) The method of controlling a multi-leaf collimator according to claim 5, 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. ### Claim 8 (depends on 5) The method of controlling a multi-leaf collimator according to claim 5, 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 move. ### Claim 9 (depends on 1) The method of controlling a multi-leaf collimator according to claim 1, wherein, before or at the time the treatment head is controlled to rotate to a conformal position of the Kth treatment point, a radiation source of the treatment head has completed the treatment of the (K-1)th treatment point; wherein, the method further comprises: before or at the time the treatment head is controlled to rotate to a position of the Kth treatment point, the radiation source of the treatment head is controlled to complete the conformation of the Kth treatment point. ### Claim 10 (depends on 1) The method of controlling a multi-leaf collimator according to claim 1, further comprising: determining if the Kth treatment point is the last treatment point. ### Claim 11 (depends on 1) A system of controlling a multi-leaf collimator, comprising a processor, wherein the processor is configured to perform the method of controlling the multi-leaf collimator according to claim 1. ### Claim 12 (depends on 1) 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.