Background: To enhance the dose to tumor, the use of high atomic number elements has been proposed.Objective: The aim of this study is to investigate the effect of gold nanoparticle distribution on dose enhancement in tumor when the tumor is irradiated by typical monoenergetic X-ray beams by considering homogeneous and inhomogeneous distributions of gold nanoparticles (GNPs) in the tumor.Method...

Introduction Proton therapy is used to treat malignant tumors such as melanoma inside the eye. Proton particles are adjusted according to various parameters such as tumor size and position and patient’s distance from the proton source. The purpose of this study was to assess absorbed doses in eyes and various tumors found in the area of sclera and choroid and the adjacent tissues in radiotherap...

Introduction The first medical intervention for many breast cancer patients is breast conserving surgery (BCS) and/or modified radical mastectomy (MRM). Most of these patients undergo radiation therapy, following surgery. The most common side-effect of breast radiotherapy is skin damage. In the present study, the severity of acute skin changes and the underlying causes were investigated in pati...

Endometrial cancer is one of the most common gynecological cancers in the world. The standard treatment of endometrial cancer includes hysterectomy with bilateral salpingooophorectomy, pelvic and/or para-aortic lymph node dissection/sampling, and/or adjuvant radiotherapy [1]. Selection of adjuvant therapy is based on an approximation of the risk of recurrence with features such as stage, tumor ...

Introduction: Breast cancer is one of the most common known cancers in women all around the world. It is the most common cause of death in women after lung cancer. Radiotherapy is a method for therapy of cancer in which certain dose of high energy radiations is used to destruct cancer cells. Radiotherapy is designed so that radiation of eartain does to the target area in body i...

unfortunately, last winter, we lost one of the leaders of radiotherpy-oncology in iran, professor mohammad hossein salehi. he was an excellent teacher, a supportive friend and an experienced physician.professor salehi was born on april 21, 1941 in shirvan. after graduating from high school, he continued his education in mashhad medical school. in 1968 he completed medical school and began the r...