Abstract: The present invention discloses an intracavitary radiotherapy apparatus, which is used for carrying radioactive particles or particle strips, comprising: a body that is formed by winding metal wires, and is a wire mesh having a hollow cavity penetrating through same in the forward and backward directions; and a radioactive particle groove that is provided on the outer surface of the body, is a cylindrical wire mesh having a hollow cavity penetrating through same in the forward and backward directions, and is used for accommodating the radioactive particles or particle strips. The radioactive particle groove comprises a plurality of groove bodies arranged in parallel, and the spacing between two adjacent groove bodies is less than the length of the radioactive particles or particle strips.

Abstract: Provided in the present invention is a three-dimensional precise intracavitary radiotherapy method and system for treating tumours, comprising the steps of: (1) lesion three-dimensional quantitative measurement and analysis of three-dimensional scanning image of the lesion cavity; (2) comprehensive analysis according to lesion three-dimensional quantitative measurement results and lesion characteristics to calculate the three-dimensional distribution of lesion radiation dose; and (3) according to the three-dimensional distribution diagram of radiation dose, selecting appropriate radiation sources and radiation dose to make a stent, and performing three-dimensional precise intracavitary radiotherapy. At the same time, also provided by the present invention is a system for achieving the above radiotherapy method.