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Calibration of Mg 2 SiO 4 (Tb) thermoluminescent dosimeters for use in determining diagnostic x‐ray doses to Adult Health Study participants
Author(s) -
Kato Kazuo,
Antoku Shigetoshi,
Sawada Shozo,
Russell Walter J.
Publication year - 1991
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 - 10.1118/1.596608
Subject(s) - dosimeter , thermoluminescence , thermoluminescent dosimeter , dosimetry , thermoluminescent dosimetry , calibration , x ray , nuclear medicine , materials science , medicine , medical physics , radiochemistry , optics , optoelectronics , luminescence , physics , chemistry , quantum mechanics
Characteristics of Mg 2 SiO 4 (Tb) thermoluminescent dosimeters (TLD) were ascertained preparatory to measuring doses from diagnostic x‐ray examinations received by Adult Health Study participants. These detectors are small, relatively sensitive to low‐dose x rays, and are appropriate for precise dosimetry. Extensive calibration is necessary for precisely determining doses according to their thermoluminescent intensities. Their sensitivities were investigated by dose, according to x‐ray tube voltage, and by exposure direction, to obtain directional dependence. Dosimeter sensitivity lessened due to the fading effect and diminution of the planchet. However, these adverse effects can be avoided by storing the dosimeters at least 1.5 h and by using fresh silver‐plated planchets. Thus the TLDs, for which sensitivities were determined in this study, will be useful in subsequent diagnostic x‐ray dosimetry.