Clinical evaluation of single-shot and readout-segmented diffusion-weighted imaging in stroke patients at 3 T
Clinical evaluation of single-shot and readout-segmented diffusion-weighted imaging in stroke patients at 3 T
复制标题
DOI：
10.1258/ar.2012.120541
复制
发表时间：
2013-04-01
期刊：
影响因子：
1.3
通讯作者：
Runge, Val
中科院分区：
文献类型：
--
作者：
Morelli, John;Porter, David;Runge, Val
背景资料：弥散加权成像（DWI）磁共振成像（MRI）最常使用单次激发回波平面成像技术（ss-EPI）进行。磁敏感伪影和图像模糊是严重的，当这个序列是利用在3 T目的：为了评估一个读出分段的方法，以DWI MR相比，单次激发回波平面成像的脑MRI。材料和方法：11名健康志愿者和14名急性和早期亚急性脑梗死患者在1.5和3 T下进行了ss-EPI和读出分段回波平面（rs-EPI）DWI检查。在相同标称空间分辨率下的DWI。计算信噪比（SNR）和对比噪声比（CNR），由两名盲读片员根据高信号强度体磁敏感伪影、空间失真、图像模糊、总体偏好和运动伪影对扫描进行排序。结果：rs-EPI的SNR和CNR最大（8.1 ± 0.2 SNR vs. 6.0 ± 0.2; P
Background: Diffusion-weighted imaging (DWI) magnetic resonance imaging (MRI) is most commonly performed utilizing a single-shot echo-planar imaging technique (ss-EPI). Susceptibility artifact and image blur are severe when this sequence is utilized at 3 T.Purpose: To evaluate a readout-segmented approach to DWI MR in comparison with single-shot echo planar imaging for brain MRI.Material and Methods: Eleven healthy volunteers and 14 patients with acute and early subacute infarctions underwent DWI MR examinations at 1.5 and 3T with ss-EPI and readout-segmented echo-planar (rs-EPI) DWI at equal nominal spatial resolutions. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) calculations were made, and two blinded readers ranked the scans in terms of high signal intensity bulk susceptibility artifact, spatial distortions, image blur, overall preference, and motion artifact.Results: SNR and CNR were greatest with rs-EPI (8.1 +/- 0.2 SNR vs. 6.0 +/- 0.2; P