Parameter | Grade I | Grade II | Grade III | P value |
---|---|---|---|---|
ADC (× 10−6 mm2/s) | ||||
Mean intensity | 895.2 ± 9.3 | 678.6 ± 5.9 | 605.1 ± 8.5 | < 0.01 |
Modal intensity | 863.5 ± 10.6 | 659.4 ± 6.6 | 588.7 ± 5.8 | < 0.01 |
Median intensity | 910.3 ± 12.7 | 697.8 ± 7.4 | 613.0 ± 13.2 | 0.01 |
Maximum value | 1233.2 ± 114.5 | 1205 ± 143.4 | 1162.7 ± 157.6 | 0.21 |
Minimum value | 582 ± 88.5 | 535 ± 76.9 | 518 ± 98.6 | 0.15 |
10th percentile | 645.6 ± 51.4 | 638.9 ± 44.6 | 622.2 ± 58.7 | 0.09 |
25th percentile | 736.9 ± 55.4 | 725.5 ± 41.15 | 704.4 ± 54.3 | 0.11 |
75th percentile | 1094.7 ± 33.6 | 1003.6 ± 37.5 | 927.6 ± 45.8 | 0.04 |
90th percentile | 1148.8 ± 39.8 | 1044.5 ± 41.5 | 986.6 ± 46.0 | 0.02 |
Kurtosis | 3.8 ± 0.6 | 3.5 ± 0.8 | 3.7 ± 1.2 | 0.08 |
Skewness | 0.06 ± 0.11 | 0.07 ± 0.16 | 0.03 ± 0.18 | 0.24 |
SD | 64.5 ± 13.3 | 56.6 ± 11.2 | 48.8 ± 13.7 | 0.02 |
T1WI-post-contrast | ||||
Mean intensity | 1116.3 ± 84.5 | 1025.1 ± 79.6 | 818.6 ± 95.6 | < 0.01 |
Modal intensity | 1195.7 ± 88.9 | 1134.2 ± 85.1 | 925.7 ± 99.3 | < 0.01 |
Median intensity | 1044.8 ± 76.7 | 984.3 ± 78.1 | 776.3 ± 88.8 | < 0.01 |
Maximum value | 1343.8 ± 174.7 | 1296.3 ± 152.0 | 1158.7 ± 181.6 | 0.31 |
Minimum value | 258.7 ± 94.6 | 225.6 ± 93.5 | 181.8 ± 76.6 | 0.24 |
10th percentile | 512.9 ± 64.2 | 473.8 ± 58.7 | 426.3 ± 76.3 | 0.18 |
25th percentile | 856.6 ± 58.2 | 731.3 ± 55.9 | 628.5 ± 61.8 | 0.04 |
75th percentile | 1224.7 ± 90.4 | 1191.5 ± 87.2 | 989.6 ± 92.5 | 0.07 |
90th percentile | 1296.8 ± 61.2 | 1238.5 ± 60.6 | 1078.9 ± 78.1 | 0.02 |
Kurtosis | 3.9 ± 1.3 | 4.0 ± 1.2 | 5.3 ± 1.4 | 0.03 |
Skewness | − 0.36 ± 0.21 | − 0.31 ± 0.24 | − 0.19 ± 0.38 | 0.49 |
SD | 128.7 ± 22.1 | 106.0 ± 23.6 | 95.4 ± 25.5 | 0.03 |
T2WI-FLAIR | ||||
Mean intensity | 567.9 ± 67.4 | 523.6 ± 78.3 | 505.4 ± 79.9 | 0.09 |
Modal intensity | 753.2 ± 54.6 | 678.4 ± 55.1 | 615.4 ± 58.0 | 0.01 |
Median intensity | 659.2 ± 60.5 | 615.3 ± 66.9 | 578.3 ± 75.4 | 0.18 |
Maximum value | 875.5 ± 82.3 | 794.8 ± 81.7 | 742.2 ± 75.2 | 0.16 |
Minimum value | 189.5 ± 67.4 | 157.0 ± 65.2 | 201.2 ± 73.5 | 0.47 |
10th percentile | 331.2 ± 58.2 | 302.6 ± 48.6 | 291.4 ± 52.3 | 0.28 |
25th percentile | 385.5 ± 74.8 | 347.6 ± 66.7 | 321.2 ± 72.5 | 0.32 |
75th percentile | 724.3 ± 86.9 | 688.3 ± 85.4 | 645.0 ± 91.6 | 0.21 |
90th percentile | 814.6 ± 81.5 | 734.7 ± 77.9 | 692.2 ± 71.8 | 0.15 |
Kurtosis | 4.1 ± 1.5 | 4.3 ± 0.9 | 5.8 ± 1.2 | 0.03 |
Skewness | − 0.43 ± 0.31 | − 0.45 ± 0.28 | − 0.31 ± 0.29 | 0.54 |
SD | 58.2 ± 8.8 | 44.6 ± 6.4 | 36.3 ± 9.1 | 0.02 |