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Author Baci, Syrja ♦ Telhaj, Ervis ♦ Malkaj, Partizan
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ RADIOLOGY AND NUCLEAR MEDICINE ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CALIBRATION ♦ COMPARATIVE EVALUATIONS ♦ CORRECTIONS ♦ DOSE RATES ♦ DOSEMETERS ♦ GAMMA DOSIMETRY ♦ HOSPITALS ♦ IN VIVO ♦ IRRADIATION ♦ NEOPLASMS ♦ PATIENTS ♦ PHANTOMS ♦ PHOTON BEAMS ♦ PHOTONS ♦ PMMA ♦ QUALITY ASSURANCE ♦ RADIATION DOSES ♦ RADIOTHERAPY ♦ SI SEMICONDUCTOR DETECTORS
Abstract In Vivo Dosimetry (IVD) is a set of methods used in cancer treatment clinics to determine the real dose of radiation absorbed by target volume in a patient’s body. IVD has been widely implemented in radiotherapy treatment centers and is now recommended part of Quality Assurance program by many International health and radiation organizations. Because of cost and lack of specialized personnel, IVD has not been practiced as yet, in Albanian radiotherapy clinics. At Hygeia Hospital Tirana, patients are irradiated with high energy photons generated by Elekta Synergy Accelerators. We have recently started experimenting with the purpose of establishing an IVD practice at this hospital. The first set of experiments was aimed at calibration of diodes that are going to be used for IVD. PMMA, phantoms by PTW were used to calibrate p – type Si, semiconductor diode dosimeters, made by PTW Freiburg for entrance dose. Response of the detectors is affected by energy of the beam, accumulated radiation dose, dose rate, temperature, angle against the beam axis, etc. Here we present the work done for calculating calibration factor and correction factors of source to surface distance, field size, and beam incidence for the entrance dose for both 6 MV photon beam and 18 MV photon beam. Dependence of dosimeter response was found to be more pronounced with source to surface distance as compared to other variables investigated.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-25
Publisher Place United States
Volume Number 1722
Issue Number 1


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