Zobrazeno 1 - 10
of 26
pro vyhledávání: '"D. V. Webb"'
Publikováno v:
Physics in Medicine and Biology. 60:883-904
The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) has established a method for ionisation chamber calibrations using megavoltage photon reference beams. The new method will reduce the calibration uncertainty compared to a (60)Co
Autor:
D. J. Butler, David S Followill, D. V. Webb, T. Wright, P. D. Harty, G. Ramanathan, Chris Oliver, Andrew Cole, Jessica Lye
Publikováno v:
Australasian Physical & Engineering Sciences in Medicine. 37:753-761
The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) maintains the Australian primary standard of absorbed dose. Until recently, the standard was used to calibrate ionisation chambers only in (60)Co gamma rays. These chambers are t
Autor:
D. J. Butler, P. D. Harty, Jessica Lye, D. V. Webb, T. Wright, Chris Oliver, G. Ramanathan, Rick Franich
Publikováno v:
Radiation Protection Dosimetry. 155:100-109
The ARPANSA calibration service for 60Co gamma rays is based on a primary standard graphite calorimeter that measures absorbed dose to graphite. Measurements with the calorimeter are converted to the absorbed dose to water using the calculation of th
Publikováno v:
Australasian Physical & Engineering Sciences in Medicine. 35:105-108
The Australian radiation protection and nuclear safety agency (ARPANSA) has continuously provided a level 1 mailed thermoluminescence dosimetry audit service for megavoltage photons since 2007. The purpose of the audit is to provide an independent ve
Publikováno v:
Medical Physics. 37:3935-3939
Purpose: To investigate and quantify electron contamination from the lead cutouts used in kilovoltage x-ray radiotherapy. Methods: The lead cutouts were modeled with the Monte Carlo EGSnrc user codes DOSXYZnrc and DOSRZnrc for x-ray beams ranging fro
Publikováno v:
Metrologia. 47:11-20
ARPANSA has calculated new Monte Carlo corrections for their low and medium energy x-ray free-air chambers. The new calculations include a diverging beam and details of the limiting aperture. The diverging beam simulations are compared with previous
Publikováno v:
Australasian Physics & Engineering Sciences in Medicine. 29:206-215
Australian and Canadian calibration coefficients for air kerma and absorbed dose to water for60Co gamma radiation have been compared using transfer standard ionization chambers of types NE 2561 and NE 2611A. Whilst the primary standards of air kerma
Autor:
Jessica Lye, G. Ramanathan, P. D. Harty, T. Wright, Viliami Takau, Chris Oliver, D. V. Webb, D. J. Butler
Publikováno v:
Australasian physicalengineering sciences in medicine. 38(2)
The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) maintains a (60)Co teletherapy source primarily for the calibration of therapy dosemeters. The source and encapsulating head were replaced in early 2010 with an Eldorado 78 head
Publikováno v:
Physics in Medicine and Biology. 47:1421-1433
The output signal of an organic scintillator probe consists of a scintillation signal and Cerenkov and fluorescence radiation (CFR) signal when the probe is exposed to a mega-voltage photon or electron beam. The CFR signal is usually unwanted because
Autor:
J E, Lye, D J, Butler, R D, Franich, P D, Harty, C P, Oliver, G, Ramanathan, D V, Webb, T, Wright
Publikováno v:
Radiation protection dosimetry. 155(1)
The ARPANSA calibration service for (60)Co gamma rays is based on a primary standard graphite calorimeter that measures absorbed dose to graphite. Measurements with the calorimeter are converted to the absorbed dose to water using the calculation of