Introduction: The purpose of this study was to estimate the secondary cancer risk of thyroid for standard radiotherapy methods which are commonly used for breast cancer patients. Materials and Methods: Sixty-four breast cancer patients (their age range was around 50 years old) who referred to Seyed- Al- Shohada hospital (Isfahan, Iran) were included in this ...

Introduction: The presence of heterogeneities such as air-filled cavities in the head and neck treatment fields region, may result in potential dosimetric disagreement because the losses of charged particle equilibrium. Most of treatments planning systems are not able to predict dose distribution of inhomogeneities region accurately. Therefore, dose calculation algorithms need to...

Purpose: We evaluated the effect of high dose involved field radiotherapy and concurrent chemotherapy for treating patients with limited disease, small cell lung cancer. Materials and Methods: We reviewed the medical records of 37 patients who had a limited stage of small cell lung cancer. All the patients were treated with induction chemotherapy followed by definitive radiotherapy and concurre...

Introduction: Radiation therapy is one of the main treatments for rectal cancer. In three-dimensional conformal radiotherapy, exposure of healthy tissue around the tumor is unavoidable. The small intestine is the most important organ at risk of rectal cancer radiotherapy. Intestinal complications are a major factor limiting the dose radiotherapy for rectal cancer. The most com...

the combined modality treatment of limited-stage small-cell lung cancer. The National Cancer Institute of Canada Clinical Trials Group. J Clin Oncol 1993; 11: 336–344. 3. Jeremic B, Shibamoto Y, Acimovic L et al. Initial versus delayed accelerated hyperfractionated radiation therapy and concurrent chemotherapy in limited small-cell lung cancer: a randomized study. J Clin Oncol 1997; 15: 893–900...

Introduction: Radiotherapy is one of the effective methods in the treatment of cancer. In the recent methods of radiotherapy, intensity modulated radiotherapy (IMRT) technique by compensators is used. when photon beam passes the compensator, scattered photons can be generated within the compensator. The presence of scattered photons may complicate the design of compensators as...

The cases of CNS metastases are increasing because of increase in incidence of cancer in the general population, with longer survival due to improved patient care services in the field of oncology, surgery and radiotherapy. It is also partly due to the earlier diagnosis of small tumors by improved technology in the field of imaging. In clinical practice, therefore, CNS metastases have become a ...

*Corresponding author: Dr. Asghar Mesbahi, Medical Physics Department, Medical School, Tabriz University of Medical Sciences, Tabriz, Iran. Fax: +98 411 3364660 Email: [email protected] Background: Prediction of the absorbed dose in irradiated volume plays an important role in the outcome of radiotherapy. Application of small fields for radiotherapy of thorax makes the dose calculation pr...