Table 5. Qualitative analysis for PD-TSE FS, 3D-DESS, DESSHR sequences at 7T MRI as assessed by five readers.
| Sequence | PD-TSE FS | 3D-DESS | DESSHR | P-values | ||
|---|---|---|---|---|---|---|
| 3D-DESS vs. PD-TSE FS | DESSHR vs. PD-TSE FS | DESSHR vs. 3D-DESS | ||||
| Overall image quality | 4.2 (4.0–4.8) | 5 (5.0–5.0) | 5 (5.0–5.0) | <0.001 | <0.001 | 1.000 |
| Pulsatile flow artifacts | 4 (3.2–4.0) | 5 (5.0–5.0) | 4 (4.0–4.0) | <0.001 | 0.035 | <0.001 |
| CPN visualization | 4 (4.0–4.2) | 4 (3.8–4.0) | 5 (4.8–5.0) | 0.280 | <0.001 | <0.001 |
| BPN visualization | 3.2 (3.0–3.4) | 5 (4.2–5.0) | 4.2 (4.0–4.6) | <0.001 | <0.001 | 0.042 |
| TN visualization | 4 (4.0–4.0) | 3.6 (3.2–4.0) | 5 (5.0–5.0) | 0.017 | <0.001 | <0.001 |
| SN visualization | 3.2 (3.0–4.0) | 2 (2.0–2.0) | 5 (4.8–5.0) | <0.001 | <0.001 | <0.001 |
Data were presented as the median (IQR) of the average values derived from the five grades assigned by the five readers. The Friedman test with pairwise post-hoc Wilcoxon test with Bonferroni-Holm correction was employed. P < 0.05 means a significant difference. PD = proton density, TSE = turbo spin-echo, FS = fat suppression, 3D = three-dimensional, DESS = double echo steady state, DESSHR = means DESS sequence with a high in-plane resolution, 7T = 7 tesla, MRI = magnetic resonance imaging, IQR = interquartile range, CPN = common peroneal nerve, BPN = branches of the peroneal nerve, TN = tibial nerve, SN = saphenous nerve