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Fast carotid artery MR angiography with compressed sensing based three-dimensional time-of-flight sequence

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机构: [1]Nanchang Univ, Ctr Lab, Affiliated Hosp 3, Nanchang 330008, Jiangxi, Peoples R China; [2]Nanchang Univ, Dept Radiol, Affiliated Hosp 3, Nanchang 330008, Jiangxi, Peoples R China; [3]Univ Cambridge, Dept Radiol, Cambridge CB2 0QQ, England; [4]Capital Med Univ, Beijing Anzhen Hosp, Dept Radiol, Beijing 100029, Peoples R China; [5]Nanchang Univ, Affiliated Hosp 3, Dept Ophthalmol, Nanchang 330008, Jiangxi, Peoples R China
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关键词: CS-3D TOF Compressed sensing MR angiography 3D TOF Pseudo-sequential phase encoding order

摘要:
Objective: In this study, we sought to investigate the feasibility of fast carotid artery MR angiography (MRA) by combining three-dimensional time-of-flight (3D TOF) with compressed sensing method (CS-3D TOF). Materials and methods: A pseudo-sequential phase encoding order was developed for CS-3D TOF to generate hyper-intense vessel and suppress background tissues in under-sampled 3D k-space. Seven healthy volunteers and one patient with carotid artery stenosis were recruited for this study. Five sequential CS-3D TOF scans were implemented at 1, 2, 3, 4 and 5-fold acceleration factors for carotid artery MRA. Blood signal-to-tissue ratio (BTR) values for fully-sampled and under-sampled acquisitions were calculated and compared in seven subjects. Blood area (BA) was measured and compared between fully sampled acquisition and each under-sampled one. Results: There were no significant differences between the fully-sampled dataset and each under-sampled in BTR comparisons (P> 0.05 for all comparisons). The carotid vessel BAs measured from the images of CS-3D TOF sequences with 2,3, 4 and 5-fold acceleration scans were all highly correlated with that of the fully-sampled acquisition. The contrast between blood vessels and background tissues of the images at 2 to 5-fold acceleration is comparable to that of fully sampled images. The images at 2 x to 5 x exhibit the comparable lumen definition to the corresponding images at 1 x. Conclusion: By combining the pseudo-sequential phase encoding order, CS reconstruction, and 3D TOF sequence, this technique provides excellent visualizations for carotid vessel and calcifications in a short scan time. It has the potential to be integrated into current multiple blood contrast imaging protocol. (C) 2017 Published by Elsevier Inc.

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出版当年[2016]版:
大类 | 4 区 医学
小类 | 3 区 核医学
最新[2023]版:
大类 | 4 区 医学
小类 | 4 区 核医学
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出版当年[2015]版:
Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
最新[2023]版:
Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

影响因子: 最新[2023版] 最新五年平均 出版当年[2015版] 出版当年五年平均 出版前一年[2014版] 出版后一年[2016版]

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第一作者机构: [1]Nanchang Univ, Ctr Lab, Affiliated Hosp 3, Nanchang 330008, Jiangxi, Peoples R China; [2]Nanchang Univ, Dept Radiol, Affiliated Hosp 3, Nanchang 330008, Jiangxi, Peoples R China;
通讯作者:
通讯机构: [4]Capital Med Univ, Beijing Anzhen Hosp, Dept Radiol, Beijing 100029, Peoples R China; [5]Nanchang Univ, Affiliated Hosp 3, Dept Ophthalmol, Nanchang 330008, Jiangxi, Peoples R China
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