Poudel Sashi, Weir Lori, Dowling Dawn, Medich David C
*Department of Physics, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609; †Department of Radiology, Lawrence General Hospital, 1 General St, Radiology Department, Lawrence, MA 01841.
Health Phys. 2016 Aug;111(2 Suppl 2):S166-71. doi: 10.1097/HP.0000000000000546.
A statistical pilot study was retrospectively performed to analyze potential changes in occupational radiation exposures to Interventional Radiology (IR) staff at Lawrence General Hospital after implementation of the i2 Active Radiation Dosimetry System (Unfors RaySafe Inc, 6045 Cochran Road Cleveland, OH 44139-3302). In this study, the monthly OSL dosimetry records obtained during the eight-month period prior to i2 implementation were normalized to the number of procedures performed during each month and statistically compared to the normalized dosimetry records obtained for the 8-mo period after i2 implementation. The resulting statistics included calculation of the mean and standard deviation of the dose equivalences per procedure and included appropriate hypothesis tests to assess for statistically valid differences between the pre and post i2 study periods. Hypothesis testing was performed on three groups of staff present during an IR procedure: The first group included all members of the IR staff, the second group consisted of the IR radiologists, and the third group consisted of the IR technician staff. After implementing the i2 active dosimetry system, participating members of the Lawrence General IR staff had a reduction in the average dose equivalence per procedure of 43.1% ± 16.7% (p = 0.04). Similarly, Lawrence General IR radiologists had a 65.8% ± 33.6% (p=0.01) reduction while the technologists had a 45.0% ± 14.4% (p=0.03) reduction.
进行了一项回顾性统计试点研究，以分析劳伦斯综合医院实施i2有源辐射剂量测定系统（Unfors RaySafe公司，俄亥俄州克利夫兰市科克伦路6045号，邮编44139 - 3302）后，介入放射学（IR）工作人员职业辐射暴露的潜在变化。在本研究中，将i2实施前八个月期间获得的每月光释光剂量测定记录按每月执行的程序数量进行归一化处理，并与i2实施后8个月期间获得的归一化剂量测定记录进行统计比较。所得统计数据包括计算每个程序的剂量当量均值和标准差，并进行适当的假设检验，以评估i2研究前后阶段之间是否存在统计学上的有效差异。对IR程序期间在场的三组工作人员进行了假设检验：第一组包括IR工作人员的所有成员，第二组由IR放射科医生组成，第三组由IR技术人员组成。实施i2有源剂量测定系统后，劳伦斯综合医院IR工作人员的参与成员每个程序的平均剂量当量降低了43.1% ± 16.7%（p = 0.04）。同样，劳伦斯综合医院的IR放射科医生降低了65.8% ± 33.6%（p = 0.01），而技术人员降低了45.0% ± 14.4%（p = 0.03）。
