Table 4.
Noise, SNR, CNR, and SIR of the extraocular muscle and lacrimal gland for orbital coronal Dixon-T2WI and SPAIR-T2WI.
| Criteria | Dixon | SPAIR | p-value |
|---|---|---|---|
| N | 7.22 ± 2.75 | 11.65 ± 2.73 | <0.001* |
| SNR | |||
| MR | 59.77 (44.45, 92.53) | 32.48 (25.79, 42.73) | <0.001 |
| IR | 56.40 (37.41, 83.50) | 32.33 (24.66, 42.73) | <0.001 |
| LR | 45.25 (32.21, 67.44) | 23.61 (17.29, 31.20) | <0.001 |
| SR | 53.32 (41.57, 84.20) | 29.44 (21.98, 41.62) | <0.001 |
| TM | 23.28 (17.68, 39.50) | 11.99 (9.80, 16.06) | <0.001 |
| WM | 46.54 (34.54, 74.35) | 28.22 (22.40, 33.55) | <0.001 |
| LG | 58.98 (39.83, 85.67) | 30.76 (22.19, 38.14) | <0.001 |
| CNR | |||
| MR | 37.07 (25.84, 53.95) | 19.54 (13.87, 30.62) | <0.001 |
| IR | 31.25 (18.11, 43.93) | 19.00 (13.61, 28.58) | <0.001 |
| LR | 20.18 (11.95, 31.48) | 10.95 (7.21, 17.46) | < 0.001 |
| SR | 28.30 (18.00, 44.61) | 16.48 (11.00, 27.54) | <0.001 |
| WM | 21.28 (15.46, 34.69) | 14.89 (11.87, 19.07) | <0.001 |
| LG | 32.17 (21.46, 49.21) | 16.76 (12.36, 24.48) | <0.001 |
| SIR | |||
| EOM | 1.32 (1.10, 1.79) | 1.27 (1.06, 1.68) | <0.001 |
| LG | 1.24 ± 0.33 | 1.12 ± 0.29 | <0.001* |
Data were presented as mean ± standard deviation (SD) or median (upper and lower quartiles) for the indicated number of patients in each group. p-values for comparisons between groups were based on paired t- or Wilcoxon signed-rank tests. *paired t-tests.
SNR, signal-to-noise ratio; CNR, contrast-to-noise ratio; EOM, extraocular muscles; N, noise; MR, medial rectus; IR, inferior rectus; LR, lateral rectus; SR, superior rectus; TM, temporalis muscle; WM, white matter; LG, lacrimal gland, SIR, signal intensity ratio.