Radiation dose for 320-row dose-modulated dynamic coronary CT angiography.
Radiation dose for 320-row dose-modulated dynamic coronary CT angiography.
复制标题
DOI：
10.1002/acm2.13390
复制
发表时间：
2021-09
影响因子：
2.1
通讯作者：
Chida K
中科院分区：
文献类型：
--
作者：
Izoe Y;Nagao M;Tokai M;Hashimoto H;Tanaka I;Chida K
区域检测器320排CT扫描仪，可以在一次旋转中覆盖整个心脏，可以帮助减少心电图（ECG）门控冠状动脉CT血管造影（CCTA）期间的辐射暴露。最近，研究人员提出了剂量调制动态CCTA与320行扫描仪检测功能性心肌缺血。在本研究中，我们将该方法的辐射剂量与标准CCTA方法和最新诊断参考水平（DRLs）进行了比较和验证。该研究共纳入164例疑似或已知冠状动脉疾病（CAD）的连续患者，这些患者使用320排扫描仪进行CCTA。将患者随机分为动态CCTA组和标准CCTA组，比较两种方案的CT剂量指数（CTDIvol）和CT系统计算的剂量长度积（DLP），并与最新的DRL进行比较。分别对77例和87例患者进行了标准和动态CCTA扫描。标准CCTA组CTDIvol明显高于动态CCTA组（41±35 mGy vs. 22±7 mGy, p = 0.0014）。标准CCTA的DLP也显著高于动态CCTA（864±702 mGy × cm vs. 434±106 mGy × cm, p < 0.0001）。对于标准扫描，CTDIvol和DLP分别超过日本2020年DRL的病例为16%（12/77）和17%（13/77）。相比之下，CTDIvol的动态扫描率仅为1% (1/87)，DLP为0%（0/87）。320排扫描仪动态CCTA时的辐射暴露剂量不超过标准CCTA，足以满足最新的DRL要求。因此，我们的结果表明，从辐射暴露的角度来看，该方法是安全的。
The area detector 320‐row CT scanner, which can cover the whole heart in one rotation, can aid in reducing radiation exposure during electrocardiography (ECG)‐gated coronary CT angiography (CCTA). Recently, researchers have proposed dose‐modulated dynamic CCTA with a 320‐row scanner for the detection of functional myocardial ischemia. In the present study, we compared and validated the radiation dose of this method with that of the standard CCTA method and the latest diagnostic reference levels (DRLs). The study included a total of 164 consecutive patients with suspected or known coronary artery disease (CAD) who underwent CCTA with a 320‐row scanner. The patients were randomly divided into dynamic and standard CCTA groups, and the CT dose index (CTDIvol) and dose length product (DLP) calculated by the CT system were compared between the two protocols and with the latest DRL. Standard and dynamic CCTA scans were performed in 77 and 87 patients, respectively. CTDIvol was significantly higher for standard CCTA than for dynamic CCTA (41 ± 35 mGy vs. 22 ± 7 mGy, p = 0.0014). DLP was also significantly higher for standard CCTA than for dynamic CCTA (864 ± 702 mGy × cm vs. 434 ± 106 mGy × cm, p < .0001). For standard scans, CTDIvol and DLP exceeded the 2020 DRL in Japan in 16% (12/77) and 17% (13/77) of cases, respectively. In contrast, rates for the dynamic scan were only 1% (1/87) for CTDIvol and 0% (0/87) for DLP. The dose of radiation exposure during dynamic CCTA with a 320‐row scanner does not exceed that of standard CCTA and is sufficient to meet the latest DRL. Thus, our results suggest that the method is safe from the perspective of radiation exposure.
登录
查看更多内容
影响因子：
2.1
作者：
Li, Ren-Feng;Hou, Chang-Long;Zhang, Jian-Hua
通讯作者：
Zhang, Jian-Hua
影响因子：
--
作者：
Paquet, F.;Bailey, M. R.;Harrison, J. D.
通讯作者：
Harrison, J. D.
影响因子：
2.1
作者：
Rawashdeh, Mohammad;Saade, Charbel;McEntee, Mark F.
通讯作者：
McEntee, Mark F.
影响因子：
3.3
作者：
Nagao, Michinobu;Yamasaki, Yuzo;Honda, Hiroshi
通讯作者：
Honda, Hiroshi
影响因子：
11.3
作者：
Inohara, Taku;Kohsaka, Shun;Fukuda, Keiichi
通讯作者：
Fukuda, Keiichi