CT positioning method in radiotherapy process

Abstract

The invention relates to the technical field of radiotherapy, and particularly relates to a CT positioning method in a radiotherapy process. The CT positioning method comprises the following steps of associating a CT positioning center with a virtual isocenter of a tumor area of a patient by using a previous CT / MR image of the patient, so that the CT positioning center is not roughly set according to experience. The CT positioning method can ensure the CT positioning center to be always at a position very close to or coincident with the isocenter with no more than 1cm of error. The method is simpler and more practical, unnecessary to add positioning for verification in the radiotherapy process, thereby saving medical resources, shortening waiting period of patients, and improving radiotherapy efficiency. The CT positioning method of the present invention also reduces radiation frequency of the patients, reduces treatment cost of the patients, and therefore effectively solves problems existing in the prior art.

Description

Technical field [0001] The present invention relates to radiation therapy, and in particular relates to a method of CT localization of a course of radiotherapy. Background technique [0002] Radiation therapy, referred to as radiotherapy, is a topical treatment for treating a tumor with radiation, the radiation used includes α produced radioisotopes, β, γ rays and various x-rays generated by the accelerator treatment machines or x-ray, electron beam, protons beam and other particle beams; during radiotherapy is irradiated with radiation to the lesion, the biological effects of radiation produced by human tissue, to achieve the maximum amount of anti-cancer tissues, cancer tissue damage, so that the reduced object, in recent years, in the radiotherapy cancer therapy increasingly prominent role and status, has become one of the primary means of treatment of malignant tumors, two-thirds of patients require the use of radiation therapy among all patients with malignant tumors. [0...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that in the current radiotherapy process, when performing CT positioning, the staff do not know the position of the isocenter, and can only roughly set the CT positioning center based on experience, so that the position difference between the CT positioning center and the isocenter is large And uncertain, leading to the need to add a positioning link for verification in the existing radiation therapy process, which will lead to the consumption of more medical resources, make patients face longer waiting periods, increase the number of times patients are irradiated, and increase patient economics. burden and other problems, a new CT positioning method is provided, which can not only effectively ensure that the CT positioning center is very close to or coincides with the isocenter, but also can omit the positioning link during radiotherapy. The main idea is as follows: :

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