Uncertainty of Radiotherapy Dosimeter Calibration of SSDL
No Thumbnail Available
Date
2011-02-02
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Bulletin of the Department of Medical Sciences - วารสารกรมวิทยาศาสตร์การแพทย์
Abstract
Secondary Standard Dosimetry Laboratory (SSDL) of Division of Radiation and MedicalDevices, maintains dosimetry standard at national level of Thailand. A Reference standard dosimeter of SSDLhas been calibrated at Primary Standard Dosmetry Laboratory of Germany: Physikalisch-TechnischeBundesanstalt (PTB). All radiotherapy dosimeters have been calibrated for corrected calibration factors.According to IAEA protocols, both air kerma calibration factor and absorbed dose to water calibration factorhave been disseminated. Uncertainties of air kerma calibration factor and absorbed dose to water calibrationfactor had been evaluated to be 1.8% and 2.0% at confidence level of 95% (k=2) respectively. Sources ofthe uncertainty as well as calculated data are shown.Key words : SSDL, PSDL, uncertainty, air kerma, absorbed dose to water
Description
Keywords
Citation
Bulletin of the Department of Medical Sciences - วารสารกรมวิทยาศาสตร์การแพทย์; Vol.50 No.1 January - March 2008; 44-57