Green S, Palethorpe J E, Peach D, Bradley D A
RRPPS, Edgbaston, Birmingham, U.K.
Appl Radiat Isot. 1999 Jan;50(1):137-52. doi: 10.1016/s0969-8043(98)00030-x.
Experiences of the Regional Radiation Physics and Protection Service (RRPPS) in performance assessment of diagnostic X-ray QA instrumentation and on-patient dosemeters are recounted. Issues relating to the provision of realistic and reproducible reference conditions for calibrated X-irradiations are considered and summary statistics from test measurements of dose and kVp meters are provided. For both dose and kVp meters it is indicated that as many as 25% of instruments used in routine use in the U.K. may require some adjustment before they can truly be said to be performing as the manufacturer intended. Results from intercomparison exercises for patient dosimetry services are also discussed. It is apparent that, for those centres participating in the exercise, dose assessments are generally being obtained to within a bias and a relative standard deviation of less then 10%.
本文讲述了区域辐射物理与防护服务机构（RRPPS）在诊断性X射线质量保证仪器和患者剂量仪性能评估方面的经验。文中考虑了为校准X射线照射提供真实且可重现的参考条件相关的问题，并给出了剂量仪和千伏峰值（kVp）仪测试测量的汇总统计数据。对于剂量仪和kVp仪，结果表明在英国常规使用的仪器中，多达25%的仪器可能需要进行一些调整，才能真正达到制造商预期的性能。文中还讨论了患者剂量测定服务比对活动的结果。显然，对于参与该活动的那些中心而言，剂量评估的偏差和相对标准偏差通常在10%以内。
