Comparison of simultaneous multi-slice readout-segmented EPI and conventional single-shot EPI for diffusion tensor imaging of the ulnar nerve
Comparison of simultaneous multi-slice readout-segmented EPI and conventional single-shot EPI for diffusion tensor imaging of the ulnar nerve
复制标题
DOI：
10.1016/j.heliyon.2018.e00853
复制
发表时间：
2018-10-01
期刊：
影响因子：
4
通讯作者：
Filli, Lukas
中科院分区：
文献类型：
--
作者：
Ho, Michael;Becker, Anton;Filli, Lukas
目的：比较传统单次回波平面成像（ss-EPI）和同步多切片（SMS）读出分段 EPI（rs-EPI）对尺神经磁共振扩散张量成像（DTI）的影响。 材料和方法：本研究得到当地伦理委员会的批准。十名健康志愿者（平均年龄 30.4 +/- 4.01 岁；范围 25-36 岁）在肘管水平接受了尺神经 3T DTI。 DTI 是基于 ss-EPI 以及 SMS rs-EPI 序列进行的。由两名独立放射科医生对两个序列之间的尺神经信噪比 (SNR)、图像质量和 DTI 参数（分数各向异性，FA；平均扩散率，MD）进行比较。 结果：ss-EPI 的采集时间为 5:12 分钟，SMS rs-EPI 的采集时间为 5:18 分钟。在两个序列之间，派生的 DTI 测量值 FA (p = 0.11) 和 MD 值 (p = 0.93) 没有发现显着差异。与传统的 ss-EPI 相比，SMS rs-EPI 产生的重影伪影明显减少 (p = 0.04)，但神经描绘较差 (p = 0.001)，整体图像质量较差 (p = 0.008)。结论：在肘管水平尺神经 DTI 方面，SMS rs-EPI 并不比 ss-EPI 更有优势。
Purpose: To compare conventional single-shot echo planar imaging (ss-EPI) and simultaneous multi-slice (SMS) readout-segmented EPI (rs-EPI) for magnetic resonance diffusion tensor imaging (DTI) of the ulnar nerve.Materials and methods: This study was approved by the local ethics committee. Ten healthy volunteers (mean age 30.4 +/- 4.01 years; range 25-36 years) underwent 3T DTI of the ulnar nerve at the level of the cubital tunnel. DTI was performed based on ss-EPI as well as SMS rs-EPI sequences. Signal-to-noise ratio (SNR), image quality, and DTI parameters in the ulnar nerve (fractional anisotropy, FA; mean diffusivity, MD) were compared between the two sequences by two independent radiologists.Results: Acquisition time was 5:12 min for ss-EPI and 5:18 min for SMS rs-EPI. Between the two sequences, no significant differences were found for derived DTI measures FA (p = 0.11) and MD values (p = 0.93). Compared to conventional ss-EPI, SMS rs-EPI yielded significantly less ghosting artifacts (p = 0.04) but inferior nerve depiction (p = 0.001) and worse overall image quality (p = 0.008).Conclusion: SMS rs-EPI is not advantageous over ss-EPI in DTI of the ulnar nerve at the level of the cubital tunnel.