Dose measurement outside of radiotherapy treatment field (Peripheral dose) using thermoluminesent dosimeters

dose measurement outside of radiotherapy treatment field (peripheral dose) using thermoluminesent dosimeters

background: in radiation therapy, peripheral dose or the dose outside the radiotherapy field, is important when anatomical structures with very low dose tolerances are involved. one of these critical organs in pelvic irradiation is testis. the amount of radiation delivered to the testes in radiotherapy must be kept as small as possible, consistent with the limit dose of this organ. the threshol...

Measurement of Thyroid Dose by TLD arising from Radiotherapy of Breast Cancer Patients from Supraclavicular Field

Background: Breast cancer is the most frequently diagnosed cancer and the leading global cause of cancer death among women worldwide. Radiotherapy plays a significant role in treatment of breast cancer and reduces locoregional recurrence and eventually improves survival. The treatment fields applied for breast cancer treatment include: tangential, axillary, supraclavicular and internal mammary ...

Dose Calculation Accuracy of Radiotherapy Treatment Planning Systems in Out-of-Field Regions

Comparing experimental assessment of the peripheral dose outside the applicator in electron beams of ELEKTA with Treatment planning system

Introduction: The use of electrons in the electron therapy to destroy tumoral tissue is dedicated significant contribution of different methods of radiation therapy. Scattered radiation due to exited electrons of the applicator affect the dose out of the field in the patient's normal tissue. The aim of this study is to determine the peripheral dose outside the applicator in the...

Dose measurement of cobalt-60 radiotherapy beams in treatment fields.

BACKGROUND Radiation-therapy is a complex process with multiple steps, each of which has an impact on the quality of treatment. Accurate dosimetry is a critical step during the radiotherapy of cancer patients.The aim of the present study was to measure and evaluate the doses of two cobalt- 60 (60Co) teletherapy units GWXJ80 of NPIC China and Theratron 780 of AECL Canada at various points within...

Measurement of outdoor and indoor ambient gamma dose rate in Gorgan and Bandar-Torkman cities using gas and thermoluminescent dosimeters

Background and Objective: Human external exposure to natural radiation sources is much more than artificial radiation sources. In this study, external annual effective doses were estimated in cities of Gorgan and Bandar-Torkman by determining ambient gamma dose rate in indoor and outdoor spaces. Materials and Methods: Using an ionization chamber detector, the outdoor and indoor ambient gamma d...