Procedure of IGRT
At the beginning of each session of radiotherapy, the patient was positioned carefully guided by skin marks that define the treatment area. Devices can be used to help the patient maintain the correct position. Pictures are then taken using the imaging equipment incorporated into the radiation delivery machine or mounted on the treatment room.
The physician then reviews the images and compares them with those taken during the simulation. You may reposition the patient and to take additional pictures. After having made any prescriptions in the treatment plan and the positioning of the patient, then radiation therapy is delivered.
The image guidance process can add up to five minutes each session of radiotherapy.