Free-breathing, three-dimensional coronary artery magnetic resonance angiography: Comparison of sequences

被引:30
作者
Weber, OM
Pujadas, S
Martin, AJ
Higgins, CB
机构
[1] Univ Calif San Francisco, Dept Radiol, San Francisco, CA 94143 USA
[2] Hosp Santa Creu & Sant Pau, Barcelona, Spain
[3] Philips Med Syst, Best, Netherlands
关键词
magnetic resonance imaging; magnetic resonance angiography; coronary arteries; steady-state free precession; spiral MRI; radial MRI;
D O I
10.1002/jmri.20141
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: To compare six free-breathing, three-dimensional, magnetization-prepared coronary magnetic resonance angiography (MRA) sequences. Materials and Methods: Six bright-blood sequences were evaluated: Cartesian segmented gradient echo (C-SGE), radial SGE (R-SGE), spiral SGE (S-SGE), spiral gradient echo (S-GE), Cartesian steady-state free precession (C-SSFP), and radial SSFP (R-SSFP). The right coronary artery (RCA) was imaged in 10 healthy volunteers using all six sequences in randomized order. Images were evaluated by two observers with respect to signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), visible vessel length, vessel edge sharpness, and vessel diameter. Results: C-SSFP depicted RCA over the longest distance with high vessel sharpness, good SNR, and excellent background suppression. S-GE provided best SNR and CNR in proximal segments, but more vessel blurring and poorer background suppression, resulting in poor visualization of distal segments. R-SSFP images showed good background suppression and best vessel sharpness, but only moderate SNR. C-SGE provided good SNR and reasonable CNR, but lowest vessel sharpness. S-SGE and R-SGE visualized the RCA over the smallest distance, mostly due to vessel blurring and low SNR, respectively. Conclusion: Overall, Cartesian SSFP provided the best image quality with excellent vessel sharpness, visualization of long vessel segments, and good SNR and CNR.
引用
收藏
页码:395 / 402
页数:8
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