Phantoms for radiation dosimetry, including physical phantoms for radiological use in medicine in particular, were introduced as early as the 1910s [1] while those for radiation protection dosimetry started to evolve in the late 1950s. This innovation was driven partly from the consensus that dose quantity for protection purposes should be assessed in “receptor conditions” instead of the tradit...

*Corresponding author: Dr. Daryoush Shahbazi-Gahrouei, Dept. of Medical Physics and Medical Engineering, Isfahan University of Medical Sciences, Isfahan, Iran. Fax: +98 311 6688597 E-mail: [email protected] carcinoma after thyroidectomy (1-6). In this therapy method, the prescription of sodium iodine is done orally (7). Radioiodine is a beta emitting radionuclide with a physical half life ...

Radiation dosimetry has the purpose of quantifying dose received by occupationally exposed individual. The device used in this process is called a dosimeter, dosimeter can be different situations, for example, to quantify fingers ring model extremity, which focus work. In Brazil, we still do not have standards calibration extremity dosimeters, therefore, work, CASEC recommendations were used, a...

A quality assurance method that utilizes 3D dosimetry and facilitates clinical interpretation Oldham Mark; Thomas Andrew; O'Daniel Jennifer; Juang Titania; Ibbott Geoffrey; Adamovics John; Kirkpatrick John P International journal of radiation oncology, biology, physics (2012), 84(2), 540-6. PURPOSE: To demonstrate a new three-dimensional (3D) quality assurance (QA) method that provides comprehe...

Post-implantation dosimetry is an important element of permanent prostate brachytherapy. This process relies on accurate localization of implanted seeds relative to the surrounding organs. Localization is commonly achieved using CT images, which provide suboptimal prostate delineation. On MR images, conversely, prostate visualization is excellent but seed localization is imprecise due to distor...

PURPOSE Ion chamber dosimetry is being used to calibrate dose for cell irradiations designed to investigate photoactivated Auger electron therapy at the Louisiana State University Center for Advanced Microstructures and Devices (CAMD) synchrotron facility. This study performed a dosimetry intercomparison for synchrotron-produced monochromatic x-ray beams at 25 and 35 keV. Ion chamber depth-dose...

Introduction: Electronic portal imaging devices (EPIDs) could potentially be useful for intensity-modulated radiation therapy (IMRT) and VMAT QA. The data density, high resolution, large active area, and efficiency of the MV EPID make it an attractive option. However, EPIDs were designed as imaging devices, not dosimeters, and as a result they do not inherently measure dose in ...

background: hdr brachytherapy is one of the commonest methods of nasopharyngeal cancer treatment. in this method, depending on how advanced one tumor is, 2 to 6 gy dose as intracavitary brachytherapy is prescribed. due to high dose rate and tumor location, accuracy evaluation of treatment planning system (tps) is particularly important. common methods used in tps dosimetry are based on computat...

Introduction Based on Task Group No. 43 (TG-43U1) recommendations, water phantom is proposed as a reference phantom for the dosimetry of brachytherapy sources. The experimental determination of TG-43 parameters is usually performed in water-equivalent solid phantoms. The purpose of this study was to determine the conversion factors for equalizing solid phantoms to water. Materials and Methods T...