Holmes Shannon M, Micka John A, DeWerd Larry A
Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA.
Med Phys. 2009 May;36(5):1473-7. doi: 10.1118/1.3098943.
Since the NIST dose to water standard for 90Sr/90Y ophthalmic 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%.
自从美国国家标准与技术研究院（NIST）针对90Sr/90Y眼科敷贴器的水吸收剂量标准出台以来，许多源已经在美国国家标准与技术研究院或威斯康星大学认可剂量校准实验室（UWADCL）进行了校准。从1997年到2008年，其中222个β发射源在UWADCL进行了校准，并且其中149个源有先前的参考源强度值。本文介绍了UWADCL眼科敷贴器校准的一项调查，结果表明先前参考值与可溯源至NIST的UWADCL水吸收剂量校准之间的平均差异为-19%，标准偏差为±16%。差异值范围为-49%至+42%。
