Preparation For  The Radiation Terapy

Before beginning a radiation therapy, there are important preparative steps that must be taken to fully target the tumor. Using imaging techniques, your oncologist will determine the radiotherapy field , the precise area to be irradiated. To accurately target the radiotherapy field , once the tumor is localized, different tools or preparations are necessary: masks, shields, castings, and simulation. Depending on the size and location of the tumor, you may have to wait days before you start the therapy.   

Once the simulation is complete, the radiation therapist will mark on your skin, precisely in the region to be treated. These marks help your physician to precisely position the machine during processing. This procedure is important in order to deliver the radiation directly into the tumor, and spare as much as possible surrounding healthy tissues. The marks do not remain permanently on your skin; they will be removed once the therapy is over.  Sometimes, plastic molds are made to optimize the distribution   of the radiation. In case a   plastic mold   is used, the marks will be made in ink on the shell and not on your skin.    

In addition, depending on the location of the tumor, initial care may be recommended. For example, dental care by a dentist is required in case of radiation to the mouth or throat. Radiation to the penis or scrotum may require sperm storage if you plan to father. In general, your health care provider will talk to you about these procedures before beginning the radiation therapy.