A Thermoluminescence Dosimetry System for Use in a Survey of High-energy Bremsstrahlung Dosimetry, Volume 13This is the final report covering the work performed under an interagency agreement between the National Bureau of Standards and the Bureau of Radiological Health during the fiscal years 1978 and 1979. A thermoluminescence dosimetry system suited for a survey of high - energy bremsstrahlung in U. S. radiation - therapy departments was selected and calibrated . The experiments leading to the choice of the recommended operational characteristics , including dosimeter handling , annealing and readout , dosimeter stability in the contemplated mode of operation , dosimeter response over the photon - energy range to be covered , irradiation geometry and irradiation level are treated in detail . Results are reported of a pilot study involving the shipment of a typical survey assembly (a plastic phantom loaded with a set of dosimeters) for irradiation in one U. S. therapy department and the overall uncertainty of the proposed survey procedure is discussed. |
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10-cm depth 10-MV bremsstrahlung beam AAPM absorbed dose annealing bremsstr Bureau of Radiological Bureau of Standards cm sides cobalt-60 gamma radiation computed curves depth dose depth in Lucite depth in water depth-dose data diation dose interpretation dose to water dosimeter handling dosimeter identity dosimeter response Dosimeter Sensitivity Ehrlich engineering experiments Function of Depth given irradiation level Harshaw heater high-energy bremsstrahlung IAEA individual dosimeter Interagency Agreement ion chambers irra Irradiation with Cobalt-60 Laboratory liaison committee low-energy Lucite Phantom Margarete Ehrlich measurement Mevatron XII National Bureau National Cancer Institute nominal depth number of dosimeters obtained participants percent phantom cube Phantom Depth phantom loaded photon Photon Energy pilot study quotient rad 10MV Radiation Therapy Radiological Health regression line relative Response in Lucite srel standard deviation supralinearity survey cycle Survey of High-Energy survey procedure systematic uncertainties technical test cycle thermoluminescence dosimetry system Varian Associates Washington