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High‐resolution dosimetry with stimulated phosphorescence
Author(s) -
Bjärngard B. E.,
Chen G. T. Y.,
Maddox B. J.
Publication year - 1976
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 - 10.1118/1.594227
Subject(s) - dosimetry , dosimeter , materials science , optics , photomultiplier , image resolution , phosphor , eyepiece , resolution (logic) , phosphorescence , thermoluminescent dosimetry , microscope , optically stimulated luminescence , nuclear medicine , thermoluminescent dosimeter , optoelectronics , detector , physics , medicine , artificial intelligence , computer science , fluorescence , lens (geology)
Thermally stimulated radiophosphorescence has been studied as a means of high‐resolution dosimetry. Small grains of CaSO 4 :Mn phosphor, embedded in a thin Teflon tape, constitute the dosimeter. The light emitted after irradiation is measured with a photomultiplier coupled to the eyepiece of a scanning microscope. With CaSO 4 :Mn, the phosphoresence at room temperature is sufficient for measurement after doses in excess of 3000 rads. The spatial resolution of the technique is about 0.2 mm. The method has been tested by measuring the dose distributions from a radium needle and a β‐emitting eye applicator.