Radiotherapy is a form of treatment that uses ionizing radiation as a therapeutic solution in oncological diseases, and in some cases it may also be indicated in situations of benign pathology. The type of radiation most often used is the X-ray, the same as that used in x-rays but with greater energy – to destroy or prevent the growth of cells. For oncological treatments, the dose received is planned so that healthy cells recover from the changes caused by radiation at the same time that malignant cells are eliminated. Radiotherapy is also used to reduce tumor volume and for symptomatic pain relief or hemorrhagic control.