Evaluation of three-dimensional navigator-gated whole heart MR coronary angiography: The importance of systolic imaging in subjects with high heart rates
Evaluation of three-dimensional navigator-gated whole heart MR coronary angiography: The importance of systolic imaging in subjects with high heart rates
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DOI：
10.1016/j.ejrad.2006.08.013
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发表时间：
2007-01-01
影响因子：
3.3
通讯作者：
Togashi, Kaori
中科院分区：
文献类型：
--
作者：
Wu, Yen-Wen;Tadamura, Eiji;Togashi, Kaori
目的：探讨心率（HR）对磁共振冠状动脉造影（MRCA）舒张期和收缩期图像质量的影响（9名男子; 33 +/-9岁，心率53-110 bpm），在1.5 T MR扫描仪上进行心电图和三维导航门控MRCA评估（Avanto，Siemens）（稳态自由旋进; TR/TE/翻转角= 3.2ms/1.6ms/90度）。通过视觉识别右冠状动脉在舒张期和收缩期的运动何时最小化，使扫描时间分别适应预扫描中获得的心脏静息期。两个阶段的图像在四点量表上并排比较（从1 =差到4 =极好的可见性; 3或4分作为诊断）。
Purpose: To evaluate the influence of heart rate (HR) on magnetic resonance coronary angiography (MRCA) image quality in diastolic and systolic phases.Materials and methods: Twenty-seven healthy volunteers (9 men; 33 +/- 9 years, HR 53-110 bpm), were evaluated with the electrocardiography and three-dimensional navigator-gating MRCA in a 1.5-T MR scanner (Avanto, Siemens) in diastolic and systolic phases (steady-state free precession; TR/TE/flip angle = 3.2 ms/1.6 ms/90 degrees). The timing of scanning was individually adapted to the cardiac rest periods obtained in the prescanning, by visually identifying when the movement of right coronary artery was minimized during diastole and systole. Images of two phases were side-by-side compared on a four-point scale (from 1 = poor to 4 = excellent visibility; score of 3 or 4 as diagnostic).Results: Of 13 subjects with HR