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首页> 外文期刊>Safety in health. >Comparison of 640-slice Aquilon ONE CT scanner’s measured dosimetric parameters with ICRP dose reference levels for head, chest and abdominal CT examinations
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Comparison of 640-slice Aquilon ONE CT scanner’s measured dosimetric parameters with ICRP dose reference levels for head, chest and abdominal CT examinations

机译：640层Aquilon ONE CT扫描仪测得的剂量参数与ICRP剂量参考水平进行头部，胸部和腹部CT检查的比较

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Background Diagnostic reference levels (DRLs) are optimum range of values or diagnostic standard data for a particular procedure by which other imaging measurements must be compared for purposes of optimizing patient dose and radiation safety in medical imaging. This study aimed to compare measured dosimetric parameters of the latest 640-Slice Aquilion ONE CT scanner with established DRLs for adult and pediatric head, chest and abdominal examinations as a quality assurance test in order to recommend appropriate radiological safety solutions if differences existed. Methods A prospective and retrospective study design was applied in this work. Data of measured CT dosimetric parameters (patient administered doses) such as dose length product and CT dose index were generated for pediatric head, chest and abdominal examinations using the Aquilion ONE CT scanner. The generated database was compared with established international standard DRLs. SPSS version 16 software was used for data processing and analysis. Results The measured volume weighted CT dose index (CTDIvol) and dose length products (DLPs) were generally lower than the ICRP and other internationally recommended DRLs. In particular, the relative deviations from the DRLs were head (CTDIvol?=??57.5?%, DLP?=??33.8?%, p -value?=?0.001), chest (CTDIvol?=??94.3?%, DLP?=??86.6?%, p -value?=?0.002), and abdomen (CTDIvol?=??91.0?%, DLP?=??75.2?%, p -value?=?0.001) for pediatric examinations, and head (CTDIvol?=?+5.5?%, DLP?=??4.0?%, p -value?=?0.001), chest (CTDIvol?=??80.3?%, DLP?=??56.6?% p -value?=?0.001), abdomen (CTDIvol?=??6.8?%, DLP?=??54.7?%, p -value?=?0.001) for adult examinations respectively. Conclusion The CTDIvol and DLP administered doses for both pediatric and adult examinations were lower than their respective DRLs except adult head examination where the measured CTDIvol was 5.5?% higher than the standard reference dose. Optimization of practice is needed to reduce dose to head CT examinations when using 640-slice Aquilion ONE CT scanner.
机译：背景诊断参考水平（DRL）是特定程序的最佳值范围或诊断标准数据，必须通过比较其他图像测量值来优化医学成像中的患者剂量和放射安全性。这项研究旨在将最新的640切片Aquilion ONE CT扫描仪的测量剂量参数与已建立的成人和儿科头部，胸部和腹部检查的DRL进行比较，以此作为质量保证测试，以便在存在差异的情况下建议适当的放射安全解决方案。方法采用前瞻性和回顾性研究设计。使用Aquilion ONE CT扫描仪为儿科头部，胸部和腹部检查生成测量的CT剂量参数（患者给药剂量）的数据，例如剂量长度乘积和CT剂量指数。将生成的数据库与已建立的国际标准DRL进行了比较。使用SPSS 16版软件进行数据处理和分析。结果测得的体积加权CT剂量指数（CTDIvol）和剂量长度乘积（DLP）通常低于ICRP和其他国际推荐的DRL。特别地，与DRL的相对偏差为头部（CTDIvolα＝Δ97.5％，CTDIvolα＝Δβ37.5％，DLPα＝Δβ33.8％，p-值β＝α，0.001）。儿科检查的DLP≥86.6％，p值= 0.002）和腹部（CTDIvol≥91.0％，DLP≥75.2％，p值0.001）。 ，和头部（CTDIvol％=？80.3％，DLP％=？56.6％）和头部（CTDIvol％=？+ 5.5％，DLP％=？4.0％，p-value？=？0.001）分别为成人检查的腹部（p-值≥0.001），腹部（CTDIvol ＝ 6.8％，DLP ＝ 54.7％，p ＝ 0.001）。结论儿科和成人检查的CTDIvol和DLP给药剂量均低于其各自的DRL，除了成人头部检查（其CTDIvol测量值比标准参考剂量高5.5％）外。当使用640层Aquilion ONE CT扫描仪时，需要优化操作以减少头部CT检查的剂量。

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