Magnetic resonance angiography with compressed sensing: An evaluation of moyamoya disease.
Magnetic resonance angiography with compressed sensing: An evaluation of moyamoya disease.
复制标题
具有压缩感应的磁共振血管造影：对Moyamoya病的评估。
DOI：
10.1371/journal.pone.0189493
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Togashi K
中科院分区：
文献类型：
--
作者：
Yamamoto T;Okada T;Fushimi Y;Yamamoto A;Fujimoto K;Okuchi S;Fukutomi H;Takahashi JC;Funaki T;Miyamoto S;Stalder AF;Natsuaki Y;Speier P;Togashi K
基于图像稀疏性的假设，欠采样测量的压缩感知（CS）重建会产生缺失数据。非对比飞行时间磁共振血管造影（TOF-MRA）是基于CS的加速的良好候选，因为MRA图像在良好抑制的解剖背景信号上具有稀疏血管的明亮树状结构。由于磁共振扫描的频率，CS的短扫描时间对烟雾病（MMD）患者有益。本研究的目的是探讨TOF-MRA与CS在烟雾病评估中的可靠性。22例患者采用ct （CS- tof）和并行显像（PI-TOF）进行TOF-MRA检查。CS-TOF的加速因子为3 （CS3）和5 (CS5)， PI-TOF的加速因子为3 （PI3）。两名神经放射科医生使用改良的Houkin系统根据狭窄/闭塞评分评估MMD分级，并使用3分制评估烟雾血管（mmv）的可见性。用Cohen’s κ计算一致性。采用Bland-Altman分析和Wilcoxon 's符号秩检验比较基底节区mmv的数量。PI3、CS3、CS5的MRA扫描时间分别为4:07、3:53、2:42。cs重建在10分钟内完成。MMD分级与MMV可见度量表呈极好的相关性（κ > .966）。虽然CS3的mmv数量明显高于PI3 （p < 0.0001）和CS5 (p < 0.0001)，但Bland-Altman分析显示PI3、CS3和CS5之间存在良好的一致性。压缩感知可以在等效时间内（CS3）或在更短的扫描时间内（CS5）获得等效结果，从而提高TOF-MRA的可视化速度。
Compressed sensing (CS) reconstructions of under-sampled measurements generate missing data based on assumptions of image sparsity. Non-contrast time-of-flight MR angiography (TOF-MRA) is a good candidate for CS based acceleration, as MRA images feature bright trees of sparse vessels over a well-suppressed anatomical background signal. A short scan time derived from CS is beneficial for patients of moyamoya disease (MMD) because of the frequency of MR scans. The purpose of this study was to investigate the reliability of TOF-MRA with CS in the evaluation of MMD. Twenty-two patients were examined using TOF-MRA with CS (CS-TOF) and parallel imaging (PI-TOF). The acceleration factors were 3 (CS3) and 5 (CS5) for CS-TOF, and 3 (PI3) for PI-TOF. Two neuroradiologists evaluated the MMD grading according to stenosis/occlusion scores using the modified Houkin’s system, and the visibility of moyamoya vessels (MMVs) using a 3-point scale. Concordance was calculated with Cohen’s κ. The numbers of MMVs in the basal ganglia were compared using Bland-Altman analysis and Wilcoxon’s signed-rank tests. MRA scan times were 4:07, 3:53, and 2:42 for PI3, CS3, and CS5, respectively. CS-reconstruction completed within 10 minutes. MMD grading and MMV visibility scales showed excellent correlation (κ > .966). Although the number of MMVs was significantly higher in CS3 than in PI3 (p < .0001) and CS5 (p < .0001), Bland-Altman analysis showed a good agreement between PI3, CS3, and CS5. Compressed sensing can accelerate TOF-MRA with improved visualization of small collaterals in equivalent time (CS3) or equivalent results in a shorter scan time (CS5).
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