Table 4.
Frequency distribution of DCE-MRI parameters of sinonasal tumors
| DCE-MRI parameters | Types of lesions, n (%) | P | ||
|---|---|---|---|---|
| Overall (N = 197) | Malignant (n = 116) | Benign (n = 81) | ||
| Tpeak (seconds) | <0.001 | |||
| T ≤ 60 | 91 (46.2) | 70 (60.3) | 21 (25.9) | |
| 60 < T ≤ 80 | 36 (18.3) | 21 (18.1) | 15 (18.5) | |
| 80 < T ≤ 100 | 18 (9.1) | 12 (10.3) | 6 (7.4) | |
| 100 < T ≤ 120 | 18 (9.1) | 4 (3.4) | 14 (17.3) | |
| T > 120 | 34 (17.3) | 9 (7.8) | 25 (30.9) | |
| Tmax (seconds) | <0.001 | |||
| T ≤ 60 | 40 (20.3) | 33 (28.4) | 7 (8.6) | |
| 60 < T ≤ 80 | 24 (12.2) | 17 (14.7) | 7 (8.6) | |
| 80 < T ≤ 100 | 20 (10.2) | 15 (12.9) | 5 (6.2) | |
| 100 < T ≤ 120 | 19 (9.6) | 13 (11.2) | 6 (7.4) | |
| T > 120 | 94 (47.7) | 38 (32.8) | 56 (69.1) | |
| CImax | 0.564 | |||
| Contrast index ≤ 0.5 | 5 (2.5) | 5 (4.3) | 0 (0.0) | |
| 0.5 < contrast index ≤ 1.0 | 61 (31.0) | 34 (29.3) | 27 (33.3) | |
| 1.0 < contrast index ≤ 1.5 | 73 (37.1) | 44 (37.9) | 29 (35.8) | |
| Contrast index > 1.5 | 58 (29.4) | 33 (28.4) | 25 (30.9) | |
| TIC type | ||||
| Persistent | 34 (17.3) | 9 (7.8) | 25 (30.9) | <0.001 |
| Plateau-shaped | 62 (31.5) | 27 (23.3) | 35 (43.2) | <0.001 |
| Washout-shaped | 101 (51.3) | 80 (69.0) | 21 (25.9) | <0.001 |
Tpeak: Time to peak enhancement; Tmax: Time to maximum enhancement; TIC: Time-intensity curve; DCE-MRI: Dynamic contrast-enhanced magnetic resonance imaging.