Noninvasive coronary artery imaging by multislice spiral computed tomography.
Noninvasive coronary artery imaging by multislice spiral computed tomography.
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通过多层螺旋计算机断层扫描进行无创冠状动脉成像。
DOI：
10.1253/circj.67.107
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Motoichirou Takahashi
中科院分区：
文献类型：
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作者：
Yuichi Sato;K. Kanmatsuse;Fumio Inoue;Toshiyuki Horie;Masahiko Kato;Junji Kusama;Akihiro Yoshimura;T. Imazeki;S. Furuhashi;Motoichirou Takahashi
多层螺旋CT（MSCT）虽然具有良好的空间分辨率，但由于其有限的时间分辨率，心脏运动伪影（CMA）导致图像再现性差，限制了其广泛的临床应用。一种新的回顾性心电门控重建方法已被开发，以尽量减少CMA。在88例连续患者中，使用2种回顾性ECG门控重建方法重建扫描数据。方法一：重建窗（250 ms）的末端位于ECG上P波的峰值处，其对应于心房收缩前即刻的舒张期缓慢充盈相的末端。方法2（常规方法）：采用相对回顾性门控，参考R-R间期50%，使重建窗（250 ms）的起始点位于心动周期R-R间期的中点。根据有无CMA评价冠状动脉图像质量。对左冠状动脉主干（LMCA）、左前降支（LAD，段#6、#7和#8）、左回旋支（LCx，段#11和#13）和右冠状动脉（RCA，段#1、#2和#3）进行评估。还评价了第一对角动脉（#9-1）、钝缘动脉（#12-1）、后降动脉（#4-PD）、房室结分支（#4-AV）和第一右心室分支（RV）。在88例患者中，85例符合图像评价的条件。方法1允许可视化的主要冠状动脉在大多数患者中没有CMA。在94%以上的患者中，LCA系统（节段#5-7、#11和#13）和RCA近端部分可见。80%以上的患者还实现了LAD（第8节段）和RCA（第4 PD和第4 AV节段）远端部分以及侧支（第9 -1、12 -1和RV）的无伪影可视化。另一方面，CMA频繁地出现在通过方法2获得的图像上。LCx和RCA系统受CMA的影响最大，显示13号节段的无伪影可视化率仅为41%，1号节段为39%，2号节段为15%，3号节段为32%。因此，避免在快速充盈和心房收缩阶段期间发生心室运动的方法1给出了优于常规ECG门控重建方法的上级图像质量。
Although the excellent spatial resolution of multislice spiral computed tomography (MSCT) enables the coronary arteries to be visualized, its limited temporal resolution results in poor image reproducibility because of cardiac motion artifact (CMA) and hence limits its widespread clinical use. A novel retrospectively ECG-gated reconstruction method has been developed to minimize CMA. In 88 consecutive patients, the scan data were reconstructed using 2 retrospectively ECG-gated reconstruction methods. Method 1: the end of the reconstruction window (250 ms) was positioned at the peak of the P wave on ECG, which corresponded to the end of the slow filling phase during diastole immediately before atrial contraction. Method 2 (conventional method): relative retrospective gating with 50% referred to the R-R interval was performed so that the beginning of the reconstruction window (250 ms) was positioned at the halfway point between the R-R intervals of the heart cycle. The quality of the coronary artery images was evaluated according to the presence or absence of CMA. The assessment was applied to the left main coronary artery (LMCA), the left anterior descending artery (LAD, segments #6, #7 and #8), the left circumflex artery (LCx, segments #11 and #13) and the right coronary artery (RCA, segments #1, #2 and #3). The first diagonal artery (#9-1), the obtuse marginal artery (#12-1), the posterior descending artery (#4-PD), the atrioventricular node branch (#4-AV) and the first right ventricular branch (RV) were also evaluated. Of the 88 patients, 85 were eligible for image evaluation. Method 1 allowed visualization of the major coronary arteries without CMA in the majority of patients. The LCA system (segments #5-7, #11 and #13) and the proximal portion of the RCA were visualized in more than 94% of patients. Artifact-free visualization of the distal portion of the LAD (segment #8) and RCA (#4PD and #4AV), and side branches (#9-1, #12-1 and RV) was also achieved in more than 80% of patients. On the other hand, CMA occurred frequently on images obtained by Method 2. The LCx and RCA systems were the most affected by CMA, revealing only 41% artifact-free visualization of the segment #13, 39% of #1, 15% of #2 and 32% of #3. Thus, Method 1, which avoids the ventricular motion occurring during the rapid filling and atrial contraction phases, gives superior image quality over the conventional ECG-gated reconstruction method.
使用电子束计算机断层扫描的三维体绘制图像来评估来自左瓦尔萨尔瓦窦的右冠状动脉异常起源的缺血的可能原因。
DOI：
10.1253/jcj.65.575
发表时间：
2001
期刊：
Japanese circulation journal
影响因子：
--
作者：
Funabashi,N;Kobayashi,Y;Rubin,GD
通讯作者：
Rubin,GD