نتایج جستجو برای: termolominecene dosimeter

تعداد نتایج: 2113  

Journal: :Bioelectromagnetics 2007
Juan Blas Francisco Angel Lago Patricia Fernández Rubén Mateo Lorenzo Evaristo José Abril

Personal exposure meters for assessing exposure to RF electric or magnetic fields are subject to errors associated with perturbations of the fields by the presence of the human body. Although these alterations are complex they are not completely unpredictable. This article concludes that this error in a common worst-case scenario could reach up to 30 dB and therefore is of concern for exposure ...

Journal: :iranian journal of medical physics 0
hamidreza baghani ph.d. student, radiation-medicine dept., nuclear engineering faculty, shahid beheshti university, tehran, iran seyed mahmoodreza aghamiri associate professor, radiation-medicine dept., nuclear engineering faculty, shahid beheshti university, tehran, iran hossein gharaati associate professor, medical engineering and physics dept., medical faculty, medical science university of tehran, tehran, iran seyed rabie mahdavi assistant professor, medical physics dept., medical faculty, medical science university of iran, tehran, iran

introduction: orthogonal radial fields are those in which the central axes are perpendicular to each other. an example of these orthogonal fields is the set of craniospinal orthogonal fields that are used for radiotherapy of medulloblastoma. craniospinal radial fields consist of two parallel-opposed fields for brain exposure and one or two posterior spinal fields for spinal cord exposure. the m...

2015
Hugo de las Heras Gala Felix Schöfer Britta Tiller Margarita Chevalier del Río Georg Zwettler Friedrich Semturs

Introduction and purpose: The latest developments in breast imaging technology have underlined the need for appropriate dosimetry and image evaluation methods for routine quality assurance. We are presenting QUART evaluation method (phantom and dosimeter) to address this need for digital x-ray mammography and breast tomosynthesis systems. We compare our dose measurements to the dose readings fr...

2012
M. F. Desrosiers A. M. Forney J. M. Puhl

The dosimeters used to monitor industrial irradiation processing commonly experience significant temperature rises that must be considered in the dose analysis stage. The irradiation-temperature coefficient for a dosimetry system is derived from the dosimeter's radiation response to the absorbed dose and the irradiation temperature. This temperature coefficient is typically expressed in percent...

Journal: :Medical physics 2013
M Carroll G Ibbott M Gillin J Adamovics

PURPOSE This investigation studies the feasibility of PRESAGE, a 3D polyurethane dosimeter, for relative dosimetry measurements of clinically relevant proton treatments using an anthropomorphic head phantom developed by the Radiological Physics Center (RPC). Performance of a low-LET dependent PRESAGE was evaluated by comparison to the traditionally used radiochromic film, EBT2, and thermolumine...

2011
B. Azadbakht

Background: The purpose of this study was to determine the percentage depth dose (PDD) of PAGAT normoxic polymer gel dosimeter by electron beams using MRI technique for a standard clinically used Co-60 therapy unit and an electa linear accelerator. Materials and Methods: Using MRI, the formulation to give the maximum change in the transverse relaxation rate R2(1/T2) was determined to be 4.5% N,...

Journal: :Radiation Measurements 2021

The alanine pellet dosimeter is a widely used reference in both medical and industrial dosimetry across wide range of beam qualities. A challenge when using low energy X-ray beams its strong dependence; significant decline observed the response per dose-to-water relative to irradiations cobalt-60 field. This decrease caused by physical difference water dose ratios combined with radiochemical in...

Journal: :European Respiratory Journal 1999

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