Department of Radiology, Jichi Medical University, School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.
Jpn J Radiol. 2020 Aug;38(8):753-760. doi: 10.1007/s11604-020-00969-7. Epub 2020 Apr 6.
To investigate the ability of three-dimensional double-echo steady-state with water excitation sequence (3D-DESS-WE) in detecting the greater occipital nerve (GON) and the lesser occipital nerve (LON).
We retrospectively reviewed 66 consecutive patients who underwent magnetic resonance imaging, including 3D-DESS-WE. Two readers evaluated the detectability [0 (poor) to 3 (excellent)] and thickness of the GON and LON. We calculated the average evaluation scores and interobserver variability for the detectability of the GON and LON. We also calculated the average nerve thickness for each of the two readers and the interobserver reproducibility for the thickness of the GON and LON. The interobserver variability was calculated using a weighted kappa analysis and the intraclass correlation coefficient (ICC) was used to evaluate the interobserver reproducibility of the nerve thickness.
The respective average score, interobserver variability, thickness and interobserver reproducibility were 3.00, excellent (κ = 1.00), 1.07 ± 0.12 mm, and almost perfect (ICC = 0.82) for the GON and 1.81, good (κ = 0.73), 0.84 ± 0.11 mm, and substantial (ICC = 0.78) for the LON. The GON was significantly thicker than the LON (p < 0.001).
The 3D-DESS-WE demonstrated excellent visualization of the GON and relatively good visualization of the LON.
探究三维双回波稳态水激励序列（3D-DESS-WE）探测枕大神经（GON）和枕小神经（LON）的能力。
回顾性分析了 66 例连续接受磁共振成像（包括 3D-DESS-WE）检查的患者。两名观察者评估 GON 和 LON 的可探测性[0（差）至 3（优）]和厚度。计算 GON 和 LON 可探测性的平均评估评分和观察者间变异性。还计算了两位观察者各自的神经平均厚度和 GON 和 LON 厚度的观察者间可重复性。观察者间变异性采用加权 κ 分析进行计算，采用组内相关系数（ICC）评估神经厚度的观察者间可重复性。
GON 的平均评分为 3.00，观察者间变异性为优秀（κ=1.00），厚度为 1.07±0.12mm，观察者间可重复性为几乎完美（ICC=0.82）；LON 的平均评分为 1.81，观察者间变异性为良好（κ=0.73），厚度为 0.84±0.11mm，观察者间可重复性为中等（ICC=0.78）。GON 明显比 LON 厚（p<0.001）。
3D-DESS-WE 可很好地显示 GON，对 LON 的显示效果相对较好。
