Table 5. .
SNR measured left (L) and right (R) in five ROIs using different MR sequences with head (H) and surface (S) coil
| Group | Closed-mouth (R) | Opened-mouth (R) | Closed-mouth (L) | Opened- mouth (L) | P值 (H-S) |
||
|---|---|---|---|---|---|---|---|
| SNR | OSag PDWI | OCor T 2WI | OSag T 2WI | OSag PDWI | OCor T 2WI | OSag T 2WI | |
| SNR1 (H) | 76.89 ± 6.09 | 76.45 ± 11.61 | 61.99 ± 8.02 | 77.01 ± 6.22 | 77.49 ± 10.26 | 61.63 ± 9.02 | p < 0.05 |
| SNR1 (S) | 62.14 ± 7.95 | 71.11 ± 11.21 | 56.11 ± 14.86 | 59.25 ± 6.98 | 71.54 ± 11.07 | 55.13 ± 14.95 | |
| SNR2 (H) | 84.87 ± 10.37 | 80.82 ± 11.04+ | 71.52 ± 12.45 | 83.89 ± 9.66 | 80.96 ± 10.69+ | 71.65 ± 12.94 | + p > 0.05 |
| SNR2 (S) | 71.54 ± 6.45 | 79.62 ± 11.24+ | 65.92 ± 7.04 | 70.67 ± 5.93 | 79.99 ± 11.55+ | 65.35 ± 8.22 | |
| SNR3 (H) | 49.61 ± 9.90 | 48.83 ± 9.01 | 33.84 ± 9.99 | 49.65 ± 8.02 | 49.03 ± 9.13 | 33.96 ± 7.01 | p < 0.05 |
| SNR3 (S) | 37.99 ± 6.92 | 35.03 ± 8.97 | 24.84 ± 7.36 | 37.59 ± 7.03 | 35.76 ± 9.23 | 25.01 ± 7.13 | |
| SNR4 (H) | 86.92 ± 7.52 | 105.02 ± 14.02 | 70.47 ± 12.51* | 87.01 ± 7.89 | 104.96 ± 13.76 | 70.84 ± 13.72* | * p > 0.05 |
| SNR4 (S) | 74.85 ± 6.35 | 115.12 ± 10.43 | 68.59 ± 6.16* | 75.12 ± 5.94 | 115.28 ± 9.95 | 68.87 ± 6.72* | |
| SNR5 (H) | 97.54 ± 6.97 | 153.56 ± 15.44 | 85.62 ± 14.36# | 97.23 ± 6.75 | 154.01 ± 13.21 | 85.19 ± 14.73# | # p > 0.05 |
| SNR5 (S) | 89.44 ± 9.19 | 177.43 ± 11.13 | 87.43 ± 10.72# | 87.99 ± 6.58 | 177.92 ± 11.98 | 87.05 ± 10.97# | |
| P值(R-L) | - | - | - | p > 0.05 | p > 0.05 | p > 0.05 | - |
OCor, oblique coronal; OSag, oblique sagittal; PDWI, proton density-weighted imaging; ROI, region of interest; SNR, signal-to-noise ratio; T 2WI, T 2 weighted image.