What does radiation reduction mean?

In the process of radiotherapy, radiotherapy reset is one of the most important steps. The first step of radiotherapy is to find a good position and give the patient a CT scan. Find a good position, fix the position, give the patient a scan, and then send the scanned image to the workstation. The doctor outlines the positioning through the image, and then the physicist makes a reasonable plan according to the doctor's method to find the center point. During the treatment, the original positioning position corresponds to this center point. This process is called radiotherapy reset.