Tatsugami Fuminari, Higaki Toru, Fukumoto Wataru, Kaichi Yoko, Iida Makoto, Fujioka Chikako, Kiguchi Masao, Kihara Yasuki, Awai Kazuo
From the Departments of *Diagnostic Radiology, †Radiology, and ‡Cardiovascular Medicine, Hiroshima University, Hiroshima, Japan.
J Comput Assist Tomogr. 2016 Jul-Aug;40(4):603-8. doi: 10.1097/RCT.0000000000000414.
Adaptive motion correction (AMC) is a new technique that can suppress blurring of the coronary arteries. We evaluated its effect on the image quality of coronary computed tomography angiography in patients with atrial fibrillation (AF).
Twenty-five patients with persistent AF underwent coronary computed tomography angiography. Axial image data sets were reconstructed with and without AMC and the image noise in the perivascular tissue of the coronary arteries was measured. Two radiologists visually evaluated the overall image quality of the coronary artery segment using a 4-point scale (1, uninterpretable; 4, good).
The mean image noise in the perivascular tissue of the right, but not the left coronary artery, was reduced by AMC (43.8 vs 52.5 Hounsfield units; P < 0.01) and the mean image quality score for the right, but not the left coronary artery, was improved by AMC (3.01 vs 2.74; P < 0.01). The image quality scores in patients with a heart rate of 75 to 114 beats per minute tended to be improved by AMC (75-94 beats per minute: P = 0.06; 95-114 beats per minute: P < 0.01); in patients with a heart rate up to 74 or above 115 beats per minute, they were not improved (P = 0.46 and P = 0.13, respectively).
Adaptive motion correction reduced motion artifacts and improved image quality of the right coronary artery in some patients with AF.
自适应运动校正（AMC）是一种可抑制冠状动脉模糊的新技术。我们评估了其对心房颤动（AF）患者冠状动脉计算机断层扫描血管造影图像质量的影响。
25例持续性AF患者接受冠状动脉计算机断层扫描血管造影。重建有和没有AMC的轴向图像数据集，并测量冠状动脉血管周围组织中的图像噪声。两名放射科医生使用4分制（1分，无法解读；4分，良好）对冠状动脉节段的整体图像质量进行视觉评估。
AMC降低了右冠状动脉而非左冠状动脉血管周围组织中的平均图像噪声（43.8对52.5亨氏单位；P<0.01），并且AMC改善了右冠状动脉而非左冠状动脉的平均图像质量评分（3.01对2.74；P<0.01）。心率为每分钟75至114次的患者的图像质量评分倾向于通过AMC得到改善（每分钟75 - 94次：P = 0.06；每分钟95 - 114次：P<0.01）；在心率高达74次或高于每分钟115次的患者中，图像质量评分未得到改善（分别为P = 0.46和P = 0.13）。
自适应运动校正减少了运动伪影，并改善了部分AF患者右冠状动脉的图像质量。
