Dose rate intensity modulation method and device, computer equipment and storage medium

Abstract

The embodiment of the invention provides a dose rate intensity modulation method and device, computer equipment and a storage medium, and relates to the field of intensity modulated radiotherapy. In the embodiment of the invention, firstly, a current actual dose, a current target dose and a current pulse frequency are obtained, and the current pulse frequency is used for representing a dose rate of a radiation beam emitted by a radiation source device; then determining an output pulse frequency according to the current actual dose, the current target dose and the current pulse frequency; and finally, the dose rate of the radiation beam emitted by the radiation source equipment is updated according to the output pulse frequency. According to the embodiment of the invention, the output pulse frequency is determined based on the current actual dose, the current target dose and the current pulse frequency, and the dose rate of the radiation beam emitted by the radiation source equipment is updated so as to continue to irradiate the target region; the degree of deviation between the actual radiotherapy effect and the result specified by the treatment plan is within an acceptance range.

Description

technical field [0001] The present invention relates to the field of radiotherapy, in particular to a dose rate intensity modulation method, device, computer equipment and storage medium. Background technique [0002] Volumetric Modulated Arc Therapy (VMAT) is a commonly used radiotherapy technique. By combining the radiation source equipment with the movement of the gantry, the radiation emitted by the radiation source equipment can be changed while the gantry rotates around the patient. The dose rate of the beam and the shape of the radiation field are used to continuously irradiate the tumor target area, and the irradiation at various angles is integrated and superimposed to form a dose distribution with better conformity, so that the irradiated dose to the organs at risk around the target area is low, and the tumor target area The characteristics of receiving high-dose irradiation can reduce the side effects caused by radiotherapy. [0003] In order to improve the gamma...

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Problems solved by technology

[0003] In order to improve the gamma pass rate of medical record execution, a tumor target area can be treated in segments. In each segment, the dose rate and field shape of the radiation beam emitted by the radiation source device remain unchanged, but the modulator pulse is lost. Or the microwave system ignition and other reasons, there is an error between the actual dose obtained by the integration and superposition of the irradiation of the target area in each small section and the target dose in the treatment plan, which makes the actual treatment result deviate from the result specified in the treatment plan

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