BACKGROUND Coronary magnetic resonance angiography (CMRA) is a promising technique for assessing the coronary arteries. However, a disadvantage of CMRA is the comparatively long acquisition time. Compressed sensing (CS) can considerably reduce the scan time. The aim of this study was to verify the feasibility of CS CMRA scanning during the waiting time between contrast injection and late gadolinium enhancement (LGE) scan in a clinical protocol. METHODS Fifty clinical patients underwent contrast-enhanced CS CMRA and conventional CMRA on a 3 T CMR scanner. After contrast injection, CS CMRA was scanned during the waiting time for LGE CMR. A conventional CMRA scan was performed after LGE CMR. We assessed acquisition times and coronary artery image quality for each segment on a 4-point scale. Visible vessel length, sharpness and diameter of right (RCA), left anterior descending (LAD), and left circumflex (LCX) coronary arteries were also quantitatively compared among the scans. RESULTS All CS CMRA scans were successfully performed within the LGE waiting time. The median total scan time was 207 s (163, 259 s) for CS and 785 s (698, 975 s) for conventional CMRA (p < 0.001). No significant differences were observed in image quality scores, vessel length measurements, sharpness, and diameter between CS and conventional CMRA. CONCLUSIONS We could achieve all CS CMRA scans within the LGE waiting time. Contrast-enhanced CS CMRA could considerably shorten the scan time while maintaining image quality compared with conventional CMRA.

中文翻译：

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使用压缩传感进行对比增强冠状动脉磁共振血管造影的可行性。


背景技术冠状动脉磁共振血管造影（CMRA）是一种有前途的评估冠状动脉的技术。然而，CMRA 的缺点是采集时间相对较长。压缩感知（CS）可以大大减少扫描时间。本研究的目的是验证临床方案中造影剂注射和晚期钆增强 (LGE) 扫描之间的等待时间内进行 CS CMRA 扫描的可行性。方法 50 名临床患者在 3 T CMR 扫描仪上接受了对比增强 CS CMRA 和常规 CMRA。注射造影剂后，在等待 LGE CMR 期间扫描 CS CMRA。 LGE CMR 后进行常规 CMRA 扫描。我们按照 4 分制评估了每个片段的采集时间和冠状动脉图像质量。扫描中还对右冠状动脉 (RCA)、左前降支 (LAD) 和左回旋支 (LCX) 的可见血管长度、锐度和直径进行了定量比较。结果 所有 CS CMRA 扫描均在 LGE 等待时间内成功执行。 CS 的中位总扫描时间为 207 秒（163、259 秒），传统 CMRA 的中位总扫描时间为 785 秒（698、975 秒）（p < 0.001）。 CS 和传统 CMRA 之间在图像质量评分、血管长度测量、清晰度和直径方面没有观察到显着差异。结论 我们可以在 LGE 等待时间内完成所有 CS CMRA 扫描。与传统 CMRA 相比，对比度增强 CS CMRA 可以显着缩短扫描时间，同时保持图像质量。