Coronary arteries: Three-dimensional MR imaging with retrospective respiratory gating
Coronary arteries: Three-dimensional MR imaging with retrospective respiratory gating
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DOI：
10.1148/radiology.201.3.8939242
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发表时间：
1996-12-01
期刊：
影响因子：
19.7
通讯作者：
Gutierrez, FR
中科院分区：
文献类型：
--
作者：
Li, DB;Kaushikkar, S;Gutierrez, FR
对12名健康志愿者和1名患者进行了冠状动脉的薄层、三维(3D)梯度回波磁共振成像，分别在没有和有回溯性呼吸门控的情况下进行。在所有检查中，通过门控，结果都得到了改善。在7例志愿者检查中，有5例用导航仪回波运动检测的最小二乘法重建的图像上的冠状动脉轮廓与用边缘检测得到的冠状动脉轮廓相同。其他五名志愿者的图像覆盖了整个心脏，覆盖了多个重叠的3D平板。动脉是从背景中分割出来的，可以从任何方向查看。连续可见血管长度：冠状动脉左主干(11.5 mm+/-0.4)，左前降支(115.9 mm+/-19.7)，左回旋支(97.2 mm+/-12.5)，右冠状动脉(125.9 mm+/-18.8)。这种呼吸门控技术明显改善了对冠状动脉的描绘。
Thin-section, three-dimensional (3D) gradient-echo magnetic resonance imaging of the coronary arteries was performed without and with retrospective respiratory gating in 12 healthy volunteers and one patient. In all examinations, results were improved with gating. In five of seven volunteer examinations, coronary artery delineation on images reconstructed by using the least-squares method for motion detection with navigator echoes was found to be equal to that obtained by using edge detection. Images in five other volunteers covered the entire heart with multiple overlapping 3D slabs. The arteries were segmented from the background and could be viewed from any orientation. The lengths of contiguously visible vessels were as follows: left main coronary artery (11.5 mm +/- 0.4 (mean +/- standard deviation); left anterior descending branch, 115.9 mm +/- 19.7; left circumflex branch, 97.2 mm +/- 12.5; and right coronary artery, 125.9 mm +/- 18.8. This respiratory gating technique clearly improved depiction of the coronary arteries.