Low Radiation Dose and High Image Quality of 320-Row Coronary Computed Tomography Angiography Using a Small Dose of Contrast Medium and Refined Scan Timing Prediction
Low Radiation Dose and High Image Quality of 320-Row Coronary Computed Tomography Angiography Using a Small Dose of Contrast Medium and Refined Scan Timing Prediction
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使用小剂量造影剂的 320 排冠状动脉计算机断层扫描血管造影的低辐射剂量和高图像质量以及精细的扫描时序预测
DOI：
10.1097/rct.0000000000000951
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发表时间：
2020
影响因子：
1.3
通讯作者：
Asayama Yoshiki
中科院分区：
文献类型：
--
作者：
Shirasaka Takashi;Nagao Michinobu;Yamasaki Yuzo;Kojima Tsukasa;Kondo Masatoshi;Hamasaki Hiroshi;Kamitani Takeshi;Kato Toyoyuki;Asayama Yoshiki
该研究的目的是探讨冠状动脉计算机断层扫描（CT）血管造影术的可行性与低千伏峰值扫描和精细的扫描时间预测使用小造影剂（CM）dose.MethodsIn协议A，120 kVp扫描和标准CM剂量。扫描时间是固定的。在方案B中，使用80 kVp和60% CM剂量。根据CM到达升主动脉峰值时间的间隔确定扫描时间。结果B方案左回旋支近端、中段和远端的CT值均高于A方案（P= 0.0235、P= 0.0007和P< 0.0001）。方案B的辐射剂量显著低于方案A（2.2±0.9 vs 4.3±1.7 mSv）。结论低千伏峰值扫描和精确的扫描时间预测可以进行低对比度、低辐射剂量、高图像质量的冠状动脉CT血管造影。
ObjectiveThe aim of the study was to investigate the feasibility of coronary computed tomography (CT) angiography with a low kilovoltage peak scan and a refined scan timing prediction using a small contrast medium (CM) dose.MethodsIn protocol A, 120-kVp scanning and a standard CM dose were used. The scan timing was fixed. In protocol B, 80 kVp and a 60% CM dose were used. The scan timing was determined according to the interval from the CM arrival to the peak time in the ascending aorta. We measured the CT number and recorded the radiation dose.ResultsHigher CT numbers were observed in the left circumflex (proximal, P= 0.0235; middle, P= 0.0007; distal, P< 0.0001) in protocol B compared with protocol A. The radiation dose in protocol B was significantly lower than in protocol A (2.2±0.9 vs 4.3±1.7 mSv).ConclusionsLow-contrast, low–radiation dose, high–image quality coronary CT angiography can be performed with low kilovoltage peak scanning and a refined scan timing prediction.