Radiotherapy device for stereo positioning of head

Abstract

The invention discloses a radiotherapy device for stereo positioning of a head. An X-ray transmitter and a digital image detection panel are integrated on an accelerator, a three-dimensional image of a patient can be quickly obtained through a cone beam computed tomography (CBCT) function, and after the three-dimensional image is obtained, software quickly locates tumor coordinates in a data set on isocenters through an algorithm; and because the technical scheme is unique in structure, the three-dimensional image of the patient can be quickly obtained through only rotating the CBCT for 120 degrees, the consumed time is short, so a plurality of groups of three-dimensional images of the patient can be obtained during a time period, tumor position variations which are caused by breathing movement can be recorded in the plurality of groups of images, the tumor positions (registration) of the plurality of three-dimensional images are compared through the algorithm, and a four-dimensional plan is designed in a radio therapy planning system according to the displacement differences of the images groups.

Description

technical field [0001] The invention relates to a medical device, in particular to a head stereotaxic radiation therapy device used in conjunction with an accelerator therapy instrument. Background technique [0002] When performing radiation therapy on tumors (target areas), there are the following important indicators: [0003] First, the precise location of the tumor. In the 3D space, the doctor or physicist first scans the patient's CT images in the CT room, and reconstructs a series of CT images into a 3D image through an algorithm. At this time, the 3D coordinates of the tumor in the 3D image can be located. Then the doctor or physicist places the patient in the accelerator room for reset, and precisely coincides the three-dimensional coordinates of the tumor with the treatment isocenter (isocenter) of the accelerator. Finally start treatment. But in this method, there is a problem. When the patient breathes, the position of the tumor will change within a certain ra...

AI Technical Summary

Problems solved by technology

The disadvantage is: still due to the influence of the time axis in 4D space, the position of the tumor in the respiratory movement will change to a certain extent. If the method of 3D space is used for verification, the dose will have a certain error

[0006] To sum up, currently there is no stereotactic radiotherapy device specially designed for treating the head in the radiotherapy market. Generally, the head and body are integrated, and the positioning accuracy of the head is not high enough.

Images