Accelerated acquisition of carotid MR angiography using 3D gradient-echo imaging with two-point Dixon
Accelerated acquisition of carotid MR angiography using 3D gradient-echo imaging with two-point Dixon
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DOI：
10.1007/s00234-020-02452-6
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发表时间：
2020-05-18
期刊：
影响因子：
2.8
通讯作者：
Abe, Osamu
中科院分区：
文献类型：
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作者：
Irie, Ryusuke;Amemiya, Shiori;Abe, Osamu
本研究旨在探讨采用肝脏容积加速-屈曲技术（LAVA MRA）进行快速颈动脉磁共振血管成像的可行性。7名健康志愿者和21名疑似颈动脉狭窄的连续患者接受了LAVA和常规飞行时间（cTOF）MRA。手动测量动脉与脂肪和动脉与肌肉的信号强度比。LAVA MRA在所有切片中的动脉-脂肪信号强度比均显著大于cTOF MRA（P < 0.001），在颅外颈动脉中的动脉-肌肉信号强度比更大（P < 0.001）或相等（P = 1.0）。目视评估颈动脉分叉的图像质量和每次MRA上的信号变化，并在MRA之间进行比较。两种MRA在视觉评估方面无显著差异。LAVA MRA在评价颈动脉分叉处时可提供类似于cTOF MRA的可视化，同时将扫描时间缩短五分之一。
This pilot study tests the feasibility of rapid carotid MR angiography using the liver acquisition with volume acceleration-flex technique (LAVA MRA). Seven healthy volunteers and 21 consecutive patients suspected of carotid stenosis underwent LAVA and conventional time-of-flight (cTOF) MRAs. Artery-to-fat and artery-to-muscle signal intensity ratios were manually measured. LAVA MRA exhibited a significantly larger artery-to-fat signal intensity ratio compared with cTOF MRA in all slices (P < 0.001) and exhibited a larger (P < 0.001) or equivalent (P = 1.0) artery-to-muscle signal intensity ratio in the extracranial carotid arteries. The image quality of the cervical carotid bifurcation and the signal change on each MRA were visually assessed and compared among the MRAs. There was no significant difference between the two MRAs in visual assessment. LAVA MRA can provide visualization similar to cTOF MRA in the evaluation of the cervical carotid bifurcation while reducing scan time by one-fifth.