After initial consultation with a radiologist, a plan for the treatment of the patient is drawn up. Topographic computer, magnetic resonance imaging and positron emission tomography are used to plan the treatment for the patient. The team working with the patient includes an oncologist-radiologist, a medical physicist, a radiologist technician and a nurse of the radiological department. Every specialist has his own task. The oncologist- radiologist diagnoses the disease and selects a dose of radiation. Together with a medical physicist, he determines the optimal way to deliver the chosen dose to the affected area. After which the shape and thickness of the beam of rays entering the tumor from different angles are calculated, as well as the dose delivered to the tumor. For the accuracy of calculations, images obtained with the help of computer, magnetic resonance and positron emission tomography are used. Since the proton beam should get into cancer cells with submillimeter accuracy, it is necessary to achieve fixation of the patient's body in the same posture throughout the course of treatment. For this, before the start of the course, individual restraint devices (face masks and bed pads) are manufactured, which will ensure the immobility of the patient during the procedures.