Table 2 Histogram parameters of the benign and malignant parotid gland tumor groups
Parameters | Benign parotid tumors (n = 85) | Malignant parotid tumors (n = 32) | P value |
|---|---|---|---|
Histogram of TTP (s) | |||
10th TTP | 80.231 ± 34.760 | 62.655 ± 20.500 | 0.017 |
Mean TTP | 101.542 ± 34.012 | 93.901 ± 21.753 | 0.290 |
Median TTP | 99.441 ± 65.624 | 94.399 ± 30.906 | 0.266 |
90th TTP | 120.067 ± 34.311 | 123.310 ± 33.052 | 0.966 |
Kurtosis | 5.929 ± 6.218 | 3.408 ± 2.475 | 0.003 |
Skewness | 0.437 ± 1.613 | 0.545 ± 0.940 | 0.565 |
Entropy | 1.344 ± 0.620 | 1.467 ± 0.350 | 0.000 |
Histogram of WIR (l/s) | |||
10th WIR | 40.012 ± 10.110 | 40.002 ± 20.001 | 0.835 |
Mean WIR | 50.340 ± 20.536 | 60.023 ± 20.534 | 0.727 |
Median WIR | 52.080 ± 27.573 | 54.963 ± 19.311 | 0.755 |
90th WIR | 70.431 ± 30.682 | 80.603 ± 30.713 | 0.802 |
Kurtosis | 3.723 ± 1.423 | 4.548 ± 3.133 | 0.160 |
Skewness | 0.543 ± 0.448 | 0.729 ± 0.748 | 0.134 |
Entropy | 1.328 ± 0.406 | 1.401 ± 0.447 | 0.409 |
Histogram of WOR (l/s) | |||
10th WOR | 4.942 ± 7.070 | 3.165 ± 4.852 | 0.112 |
Mean WOR | 18.345 ± 11.465 | 20.007 ± 10.112 | 0.255 |
Median WOR | 14.804 ± 14.456 | 16.471 ± 9.283 | 0.255 |
90th WIR | 34.726 ± 22.734 | 37.812 ± 20.054 | 0.219 |
Kurtosis | 4.710 ± 4.221 | 4.460 ± 1.327 | 0.322 |
Skewness | 0.917 ± 0.675 | 0.774 ± 0.485 | 0.427 |
Entropy | 1.249 ± 0.467 | 1.346 ± 0.607 | 0.221 |
Histogram of MRE (%) | |||
10th MRE | 86.363 ± 24.673 | 83.128 ± 26.243 | 0.718 |
Mean MRE | 113.712 ± 32.043 | 111.047 ± 34.471 | 0.922 |
Median MRE | 106.587 ± 47.462 | 107.831 ± 39.139 | 0.835 |
90th MRE | 143.807 ± 46.021 | 140.212 ± 46.215 | 0.874 |
Kurtosis | 9.237 ± 13.233 | 29.510 ± 53.624 | < 0.000 |
Skewness | 0.749 ± 0.730 | 0.728 ± 0.730 | 0.002 |
Entropy | 1.854 ± 0.495 | 1.872 ± 0.571 | 0.448 |