The impact of motion artifacts on the reproducibility of repeated coronary artery calcium measurements
The impact of motion artifacts on the reproducibility of repeated coronary artery calcium measurements
复制标题
DOI：
10.1007/s00330-006-0278-2
复制
发表时间：
2007-01-01
影响因子：
5.9
通讯作者：
Ito, Katsuhide
中科院分区：
文献类型：
--
作者：
Horiguchi, Jun;Fukuda, Hiroshi;Ito, Katsuhide
本研究的目的是，使用16层多排螺旋计算机断层扫描（MDCT）扫描仪进行回顾性重建，比较重复冠状动脉钙化评分和运动伪影定性评分的变异性。144例患者接受了两次MDCT扫描。根据Agatston算法和容积算法计算冠脉钙化积分，并计算冠脉钙化积分的扫描间变异性。对冠状动脉钙的运动伪影进行主观评价，并使用5分量表进行分类：1，极好;无运动伪影; 2，良好，轻微运动伪影; 3，中度，轻度运动伪影; 4，差，严重运动伪影; 5，差，加倍或不连续。按血管（左主干、左降支、左回旋支和右冠状动脉）进行每次阅读，并确定每位患者的运动伪影评分（量表平均值）。在低的可变性（1.2 +/- 0.2）和高（2.4 ± 0.6）运动伪影评分组为7 ± 6 Agatston评分分别为（中位数，6）%和19 +/- 15（16）%（P< 0.01），体积评分分别为7 +/- 7（6）%和16 +/- 13（14）%（P< 0.01）。总之，运动对冠状动脉钙评分的再现性有显著影响。
The purpose of this study is, using a 16-section multidetector-row helical computed tomography ( MDCT) scanner with retrospective reconstruction, to compare variability in repeated coronary calcium scoring and qualitative scores of the motion artifacts. One hundred forty-four patients underwent two subsequent scans using MDCT. According to Agatston and volume algorithms, the coronary calcium scores during mid-diastole ( the center corresponding to 70% of the R-R cycle) were calculated and the inter-scan variability was obtained. Motion artifacts from coronary artery calcium were subjectively evaluated and classified using a 5-point scale: 1, excellent; no motion artifacts; 2, fine, minor motion artifacts; 3, moderate, mild motion artifacts; 4, bad, severe motion artifacts; 5, poor, doubling or discontinuity. Each reading was done by vessels ( left main, left descending, left circumflex and right coronary arteries) and the motion artifact score ( mean of the scales) was determined per patient. The variability in the low (1.2 +/- 0.2) and high (2.4 +/- 0.6) motion artifact score groups was 7 +/- 6 ( median, 6)% and 19 +/- 15 ( 16)% on the Agatston score (P< 0.01) and 7 +/- 7 ( 6)% and 16 +/- 13 ( 14)% on the volume score ( P< 0.01), respectively. In conclusion, motion has a significant impact on the reproducibility of coronary calcium scoring.