Implementation method and equipment for 4D radiotherapy plan with respiratory compensation

Abstract

The invention discloses an implementation method and equipment for a 4D radiotherapy plan with respiratory compensation. The implementation method includes steps that inputting 4D medical images of different respiratory phases of a patient, and sketching a target region of each respiratory phase and a tissue outline of an organ at risk; designing the 4D radiotherapy plan; monitoring the respiratory phases of the patient and forecasting the respiratory phase change of the patient; dispatching field parameters corresponding to the respiratory phases; controlling a medical X-ray machine to form a corresponding field to finish the corresponding beam irradiation action; judging whether the 4D radiotherapy is ended, if so, forming a respiration curve diagram for the 4D radiotherapy of the patient; calculating the actual dosage distribution accepted by the patient in the radiotherapy; comparing the calculated actual dosage distribution with the planed dosage distribution of the 4D radiotherapy plane, and determining whether optimizing the subsequent 4D radiotherapy plan according to the comparative result. The implementation method and equipment for the 4D radiotherapy plan with the respiratory compensation is capable of accurately determining a four-dimensional radiotherapy target.

Description

technical field [0001] The invention relates to a method and equipment for implementing a 4D radiotherapy plan with respiratory compensation. Background technique [0002] Radiation therapy is one of the main technical means to treat malignant tumors. Its goal is to maximize the concentration of radiation to the tumor (target area), while the surrounding normal tissues and organs should receive the minimum dose. Image-guided radiation therapy (IGRT) technology is a four-dimensional radiation therapy (4D radiation therapy) based on the concept of time factor added to the three-dimensional radiation therapy technology; generally, four-dimensional radiation therapy (4D radiation therapy) is defined as the combination of image positioning, radiation therapy planning Both the design and treatment implementation stages clearly consider the radiotherapy technology that anatomical structure changes with time. The implementation process includes three parts: four-dimensional image po...

AI Technical Summary

Problems solved by technology

At the same time, the movement of the tumor location and vital organs during the treatment process is generally due to the patient's breathing. For example, the displacement of the tumor in the respiratory cycle can reach several centimeters. In order to avoid this technical problem in the prior art, the general 4D radiotherapy plan The design is aimed at a certain time phase in the 4D image. When the treatment is implemented, the patient is allowed to hold his breath at the time phase used in the design of the radiotherapy plan. This method can only be applied to patients with good self-control of breathing and willing to cooperate. The scope of application is relatively large. Narrow, and because the patient's breath holding time is limited, each treatment will seriously prolong the patient's treatment time, shorten the treatment efficiency, and have high requirements for the patient's tolerance

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