Establishment of diagnostic reference levels in cardiac computed tomography
Establishment of diagnostic reference levels in cardiac computed tomography
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DOI：
10.1002/acm2.12711
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发表时间：
2019-08-30
影响因子：
2.1
通讯作者：
McEntee, Mark F.
中科院分区：
文献类型：
--
作者：
Rawashdeh, Mohammad;Saade, Charbel;McEntee, Mark F.
本研究的目的是确定约旦心脏计算机断层扫描（CCT）的诊断参考水平（DRL）。从约旦7家心脏CT专科医院进行的228例CCT中收集了体积计算机断层扫描剂量指数（CTDIvol）和剂量长度乘积（DLP）。心脏CT的DRL定义为CTDIvol和DLP的第75百分位数。除一家临床试验机构（18次扫描）外，从每家临床试验机构的30次连续心脏CT中收集CTDIvol和DLP。根据混合回顾性和前瞻性门控模式计算的中心CTDIvol和DLP的第75百分位数分别为47.74毫戈瑞（mGy）和1035 mGy/cm。本研究证明，在接受调查的医院中，心脏CT扫描的剂量差异很大;最高和最低中位DLP之间的差异为5.1倍，范围为223.2-1146.7 mGy/cm。差异与mAs和kVp的变化相关。本研究证实了心脏CT扫描的CTDIvol和DLP的较大变异性;变异与采集方案相关，并强调了剂量优化的必要性。建议将DRL用于CCT;约旦成人心脏CT检查的优化仍有很大潜力。
The aim of this study was to determine diagnostic reference levels (DRLs) for cardiac computed tomography (CCT) in Jordan. Volume computed tomography dose index (CTDIvol) and dose-length product (DLP) were collected from 228 CCTs performed at seven Jordanian hospitals specialized in cardiac CT. DRLs for cardiac CT were defined at the 75th percentile of CTDIvol and DLP. CTDIvol and DLP were collected from 30 successive cardiac CT in each center except for one center (18 scans). The 75th percentile of the CTDIvol and the DLP of the centers calculated from mixed retrospective and prospective gated modes were 47.74 milligray (mGy) and 1035 mGy/cm, respectively. This study demonstrated wide dose variations among the surveyed hospitals for cardiac CT scans; there was a 5.1-fold difference between the highest and lowest median DLP with a range of 223.2-1146.7 mGy/cm. Differences were associated with variations in the mAs and kVp. This study confirmed large variability in CTDIvol and DLP for cardiac CT scans; variation was associated with acquisition protocols and highlights the need for dose optimization. DRLs are proposed for CCT; there remains substantial potential for optimization of cardiac CT examinations for adults in Jordan.