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Ophthalmic applicators: An overview of calibrations following the change to SI units
Author(s) -
Holmes Shan M.,
Micka John A.,
DeWerd Larry A.
Publication year - 2009
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 - 10.1118/1.3098943
Subject(s) - medical physics , dosimetry , medicine , environmental science , nuclear medicine
Since the NIST dose to water standard forSr90 ∕ Y90ophthalmic applicators was introduced, numerous sources have undergone calibration either at NIST or at the University of Wisconsin Accredited Dosimetry Calibration Laboratory (UWADCL). From 1997 to 2008, 222 of these beta‐emitting sources were calibrated at the UWADCL, and prior reference source strength values were available for 149 of these sources. A survey of UWADCL ophthalmic applicator calibrations is presented here, demonstrating an average discrepancy of − 19 % with a standard deviation of ± 16 % between prior reference values and the NIST‐traceable UWADCL absorbed dose to water calibrations. Values ranged from − 49 % to + 42 % .