Benchmarking adult CT-dose levels to regional and national references using a dose-tracking software: a multicentre experience
Benchmarking adult CT-dose levels to regional and national references using a dose-tracking software: a multicentre experience
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DOI：
10.1007/s13244-017-0570-5
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发表时间：
2017-10-01
影响因子：
4.7
通讯作者：
Casselman, Jan W.
中科院分区：
文献类型：
--
作者：
Pyfferoen, Lotte;Mulkens, Tom H.;Casselman, Jan W.
Objectives To benchmark CT-dose data for standard adult CT studies to regional and national reference levels using a dose-tracking system.Methods收集了来自三家医院的五台CT系统的数据，时间跨度为1- 2.5年（2012-2014年），使用相同类型的剂量管理系统。入选标准为成人患者和标准CT-头部、CT-腹部-骨盆、CT-胸部、CT-腰椎、CT-肺栓塞、CT-颈椎和CT-胸部-腹部研究，采用一次螺旋扫描。体积CT剂量指数（CTDIvol），剂量长度产品（DLP）和扫描长度从31,709 scannes.Results剂量优化后CTDIvol和DLP值低于国家诊断参考水平（DRL）的所有CT研究和所有系统进行了分析。在同一家医院内，在不同扫描仪上进行的CT研究的CTDIvol和DLP水平（p值ae 0.01）之间大多没有发现显著差异。相反，在可比CT研究中，在医院之间观察到了显著的剂量差异（p值< 0.01）。剂量水平范围和扫描长度差异相似的CT studys.Conclusions剂量跟踪系统有助于减少CT剂量水平低于国家DRL。然而，在这方面，医院之间和医院内的剂量和方案数据比较有可能进一步减少标准成人CT研究剂量数据的变异性。关键点关于标准成人CT程序剂量水平的回顾性三中心研究。剂量跟踪系统帮助医院保持低于国家剂量参考水平。剂量-跟踪系统有助于校准医院内扫描仪之间的CT剂量水平。基准测试显示了不同医院类似检查的CT剂量水平差异。剂量水平差异范围/扫描长度为类似的CT研究。
Objectives To benchmark CT-dose data for standard adult CT studies to regional and national reference levels using a dose-tracking system.Methods Data from five CT systems from three hospitals were collected over a 1- to 2.5-year period (2012-2014), using the same type of dose management system. Inclusion criteria were adult patients and standard CT-head, CT-abdomen-pelvis, CT-thorax, CT-lumbar spine, CT-pulmonary embolism, CT-cervical spine and CT-thorax-abdomen studies, with one helical scan. Volumetric CT-dose index (CTDIvol), dose length product (DLP) and scan length from 31,709 scans were analysed statistically.Results After dose optimisation CTDIvol and DLP values were below the national diagnostic reference levels (DRLs) for all CT studies and for all systems investigated. Mostly no significant differences were found between CTDIvol and DLP levels (p values ae 0.01) of CT studies performed on different scanners within the same hospital. Significant dose differences (p values < 0.01) were instead observed among hospitals for comparable CT studies. Dose level range and scan length differences for similar CT studies were revealed.Conclusions Dose-tracking systems help to reduce CT-dose levels below national DRLs. However, dose and protocol data comparison between and within hospitals has the potential to further reduce variability in dose data of standard adult CT studies.Key PointsRetrospective three-centre study on dose levels of standard adult CT procedures.Dose-tracking systems help hospitals to stay below national dose reference levels.Dose-tracking systems help to align CT dose levels between scanners within hospitals.Benchmarking shows CT dose level variability for similar examinations in different hospitals.Differences in dose level range/scan length for similar CT studies are revealed.