Multislice dark-blood carotid artery wall imaging: A 1.5 T and 3.0 T comparison
Multislice dark-blood carotid artery wall imaging: A 1.5 T and 3.0 T comparison
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DOI：
10.1002/jmri.20563
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发表时间：
2006-05-01
影响因子：
4.4
通讯作者：
Li, DB
中科院分区：
文献类型：
--
作者：
Koktzoglou, I;Chung, YC;Li, DB
目的：比较1.5 T和3.0 T下两种多层螺旋快速自旋回波（TSE）颈动脉壁成像技术，并研究3.0 T下更高空间分辨率颈动脉壁成像的可行性。材料和方法：多层质子密度加权（PDW）、T2加权（T2 W），和T1加权（T1 W）流入/流出饱和带（IOSB）和快速扩展覆盖双反转恢复（REX-REV）在1.5 T和3.0 T下，使用时间、覆盖范围和空间分辨率匹配（0.47 x 0.47 x 3 mm（3））的成像方案，对6名健康志愿者进行TSE颈动脉壁成像。为了研究3.0 T下改善的信噪比（SNR）是否可以提高空间分辨率，在3.0 T下进行了更高空间分辨率成像（0.31 x 0.31 x 3 mm（3））。结果：3.0T相对于1.5T时，颈动脉壁SNR（223%）和壁腔CNR（255%）在一次采集中有显著性差异（P < 0.025）。IOSB和REX-OCT图像的SNR和CNR有不同程度的差异（P < 0.05），IOSB值较大。标准化到一个共同的冲洗时间，在3.0 T和1.5 T的较低的空间分辨率成像提供了相似的水平的壁腔CNR（P = NS）。结论：多层颈动脉壁成像在3.0 T与IOSB和REX-THERM的好处，从改善SNR和CNR相对于1.5 T，并允许更高的空间分辨率颈动脉壁成像。
Purpose: To compare two multislice turbo spin-echo (TSE) carotid artery wall imaging techniques at 1.5 T and 3.0 T, and to investigate the feasibility of higher spatial resolution carotid artery wall imaging at 3.0 T.Materials and Methods: Multislice proton density-weighted (PDW), T2-weighted (T2W), and T1-weighted (T1W) inflow/outflow saturation band (IOSB) and rapid extended coverage double inversion-recovery (REX-DIR) TSE carotid artery wall imaging was performed on six healthy volunteers at 1.5 T and 3.0 T using time-, coverage-, and spatial resolution-matched (0.47 x 0.47 x 3 mm(3)) imaging protocols. To investigate whether improved signal-to-noise ratio (SNR) at 3.0 T could allow for improved spatial resolution, higher spatial resolution imaging (0.31 x 0.31 x 3 mm(3)) was performed at 3.0 T. Carotid artery wall SNR, carotid lumen SNR, and wall-lumen contrast-to-noise ratio (CNR) were measured.Results: Signal gain at 3.0 Trelative to 1.5T was observed for carotid artery wall SNR (223%) and wall-lumen CNR (255%) in an acquisitions (P < 0.025). IOSB and REX-DIR images were found to have different levels of SNR and CNR (P < 0.05) with IOSB values observed to be larger. Normalized to a common irriaging time, the higher spatial resolution imaging at 3.0 T and the lower spatial resolution imaging at 1.5 T provided similar levels of wall-lumen CNR (P = NS).Conclusion: Multislice carotid wall imaging at 3.0 T with IOSB and REX-DIR benefits from improved SNR and CNR relative to 1.5 T, and allows for higher spatial resolution carotid artery wall imaging.