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Dosimeter placement in the Rando phantom
Author(s) -
Archer Benjamin R.,
Glaze Sharon,
North Luceil B.,
Bushong Stewart C.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594320
Subject(s) - dosimeter , imaging phantom , coating , materials science , thermoluminescent dosimeter , dosimetry , layer (electronics) , nuclear medicine , optics , medicine , physics , composite material
Each section of the Alderson Rando phantom contains a tissue‐equivalent plastic coating layer approximately 2 mm thick, applied to both faces. This compensates for material removed in the sawing process. Conventional use of thermoluminescent dosimeters positions them totally or partially within the coating layer. Analysis shows that, in the lung region, dosimeters placed in this layer received a dose averaging 39% lower than those placed at midsection. Where bony structures interfere, some dosimeters in the coating layer received an 18% higher dose than those at midsection. Therefore, positioning dosimeters at the center of a section is recommended.