Method and device for reducing irradiation deviations caused by respiration during radiotherapy

Abstract

The invention discloses a method for reducing irradiation deviations caused by respiration during radiotherapy. During the process of controlling the beam emerging time of radiation therapy device, chest motion of a patient during respiration can be tracked, and the starting and the ending times of the radiation therapy device can be controlled according to the tracks of the chest motion of the patient during respiration. The invention further provides a device for achieving the method, wherein the device comprises a radiation therapy device, a camera and a computer. A luminous reference marker is used for following the up-and-down motions of the chest of the patient during the respiration, the camera is used for collecting the motion images of the luminous reference marker in real time, the computer is used for computing the motion tracks, a beam emerging start point and a beam emerging end point of the radiation therapy device can be determined according to motion tracks, the method provided by the invention can meet the requirements of smooth aspiration of the patient, irradiation position precision deviations caused by offset of tumor position during aspiration are reduced, the therapeutic effect is improved, therefore, a high therapeutic gain ratio can be achieved, and the process of radiotherapy is enabled to be more humanized.

Description

Technical field: [0001] The present invention relates to the field of physics, in particular to radiotherapy equipment, in particular to the precise control technology of radiotherapy equipment, in particular to a method and device for reducing irradiation deviation caused by breathing in radiotherapy. Background technique: [0002] In the prior art, during radiotherapy, the patient's breathing can cause tumor displacement. At present, the commonly used solutions are: (1) let the patient take a deep breath and hold it during irradiation; (2) suppress the patient's breathing to make it shallow; (3) expand the irradiation range. The above method either makes the patient in a very uncomfortable state during the whole treatment process, or causes the consequences of expanding the irradiation range, resulting in a reduction in the treatment effect. Invention content: [0003] The purpose of the present invention is to provide a method for reducing the irradiation deviation cau...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for reducing the irradiation deviation caused by breathing in radiotherapy. The method for reducing the irradiation deviation caused by breathing in radiotherapy should solve the problem of tumor displacement caused by patient breathing in radiotherapy in the prior art. technical issues

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