*Department of Thoracic Imaging, Hospital Calmette †Department of Medical Statistics, University of Lille Nord de France, Lille, France.
J Thorac Imaging. 2013 Nov;28(6):376-82. doi: 10.1097/RTI.0b013e31828d4209.
To evaluate the frequency and severity of cardiac motion artifacts on high-pitch, dual-source computed tomography angiograms of the chest.
One hundred consecutive patients underwent a non-electrocardiogram-gated, dual-source chest computed tomography examination with high pitch and high temporal resolution.
The mean (±SD) duration of data acquisition was 0.9 (±0.07) seconds and the mean (±SD) heart rate was 78.9 (±15.2) bpm. Cardiac motion artifacts were seen at the level of the pulmonary trunk in 2 patients (2%). Among the 7000 pulmonary arteries analyzed (5 central, 5 lobar, 20 segmental, and 40 subsegmental arteries/patient), pseudofilling defects were depicted at the level of 3 arteries (0.042%), always seen with the concurrent presence of a "double contour" appearance of the vessel walls. Twinkling star artifacts beyond the subsegmental level were seen within 76 segments (76/2000; 3.8% of the examined segments), most commonly in the lingula and left lower lobe. A total of 23 patients (23%) showed at least 1 category of motion artifacts, whereas 77 patients (77%) had motion-free imaging of the pulmonary arteries.
Routine scanning of patients with high pitch and high temporal resolution provides examinations devoid of detrimental cardiac motion artifacts.
评估高心率、双源 CT 肺动脉成像中心脏运动伪影的频率和严重程度。
100 例连续患者进行了非心电图门控、高心率、双源胸部 CT 检查，具有高时间分辨率。
数据采集的平均（±SD）持续时间为 0.9（±0.07）秒，平均（±SD）心率为 78.9（±15.2）次/分。2 例患者（2%）在肺动脉干水平可见心脏运动伪影。在分析的 7000 条肺动脉中（5 条中央、5 条叶、20 条段和 40 条亚段/患者），3 条动脉（0.042%）可见假性充盈缺损，始终伴有血管壁的“双重轮廓”外观。在 76 个节段（2000 个节段中的 76 个；检查节段的 3.8%）中可见亚段水平以外的闪烁星状伪影，最常见于舌叶和左下叶。共有 23 例（23%）患者至少有 1 类运动伪影，而 77 例（77%）患者的肺动脉成像无运动伪影。
使用高时间分辨率和高心率进行常规扫描可为患者提供无有害心脏运动伪影的检查。
