Your patient is being treated for cervical cancer. The patie…
Your patient is being treated for cervical cancer. The patient is being treated on a Varian 2100 CD machine (calculated SSD 100cm). She is undergoing a 4-field box treatment that includes the inguinal lymph nodes. Your patient had a total hysterectomy before beginning radiation therapy and the doctor is prescribing the dose to the surgical bed. The treatment isocenter is located 14.8 cm deep from the anterior surface. The treatment isocenter is also located 22.4 cm from the patient’s right lateral. Your patient is 29.6 cm thick and from left to right 44.8cm. What is the tumor distance from the patient’s posterior aspect?