الفهرس | Only 14 pages are availabe for public view |
Abstract The purpose of radiotherapy IS to precisely, and efficiently deliver radiation to treat several types of turnor malignant and nonmalignant abnormalities. Recently, a number of radiation incidents in various countries have been reported. The aim of in vivo dosimetry (ND) is to identify significant errors not defined by other levels of the quality system to measure each patient usually only once within the first few days of treatment, so that any problems identified can be investigated and rectified early in the treatment course. The performing of IVD for modulat radiotherapy such as Intensity Modulated Radiotherapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT) is not well established and the studies and trails available are not sufficient to give us a clear view of the verified IVD methods in modulated radiotherapy. In this study, using small dosimeter is a Thermoluminescent material as LiF. In addition, Semiconductor diodes are suitable of measuring deep-seated turnors. The objective of this study was to give validation of using diodes and TLDs for in vivo dosimetry in advanced radiotherapy techniques early detection the uncertainties and significant errors of the dose delivery. establish a routine protocol to measure each patient within the first few days of treatment. Materials and Methods Thirty nine patients (23 female and 16 male) with different clinical sites were selected for this study and measured them for five months in Children’s Cancer Hospital 57357 and used pediatric anthropomorphic A lO-years-old phantom to measure dose in IMRT and VMAT by using Therrnoluminescent dosimeters XII |