A Cyberknife Image Tracking and Positioning Method

Abstract

The invention relates to a cyberknife image tracking and positioning method, which belongs to the field of radiotherapy. The method comprises the following steps: (1) placing the patient in a simulated positioning treatment position; (2) using the default large or fixed X-ray jaw field of the Cyberknife Obtain the X-ray image of the patient; ⑶Adjust the position of the treatment bed according to the X-ray image of the patient to adjust the patient's body position; ⑷Repeat steps ⑵~⑶ as needed until the patient's position is within the treatable range of the CyberKnife; ⑸According to the radio wave Adjust the size of the target range of the knife tracking object, adjust the size of the X-ray jaw field to include the cyber knife tracking object and the predetermined range of its possible movement; (6) Use the adjusted X-ray jaw field in step (5) to perform image tracking or Guide the treatment; (7) If the patient's position moves during treatment and needs to be readjusted, repeat steps (2) to (6) as needed. The invention has the characteristics of small image tracking field and low ionizing radiation.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a cyberknife image tracking and positioning method. Background technique [0002] CyberKnife is a new type of stereotactic radiosurgery treatment equipment for whole body tumors. It has the ability to continuously detect any movement of the tumor or the patient's body position in real time, and ensures submillimeter treatment accuracy for tumors through automatic system error correction. Its continuous response ability and accurate automatic system error correction function are realized by a pair of X-ray tubes fixed on the ceiling of the radiation therapy room at 45 degrees to the horizontal line and their corresponding X-ray image detectors. X-ray images are radiation waves Whether the knife system can perform tumor tracking and precise treatment. [0003] Existing CyberKnife image tracking includes spine tracking, gold standard tracking, lung tracking, etc. In these tracking meth...

AI Technical Summary

Problems solved by technology

[0005] When X-rays act on the human body, they will produce scattered rays, and these scattered rays will produce fog when they act on the X-ray image detector, which will affect the quality of X-ray imaging

Under the same conditions, the X-ray exposure area is large, which produces more scattered rays, and the quality of X-ray images will also deteriorate, thereby affecting the recognition of relevant anatomical structures in X-ray images.

Cyberknife image tracking uses a large and fixed exposure field, and its scattered rays have a great impact on Cyberknife image tracking. Therefore, a special X-ray imaging algorithm has to be designed to correct this shortcoming as much as possible.

[0006] In summary, the existing CyberKnife image tracking X-ray field has a large and fixed field, many scattered rays, and poor X-ray image quality during actual treatment, which is not conducive to CyberKnife image tracking and radiotherapy technician positioning; and , the X-ray images received by patients have a large range of tracking radiation, which is not conducive to the protection of patients from ionizing radiation