Table II.
Perfusion parameter analysis of malignant and benign breast lesions.
| Parameter | Benign (n=73) | Malignant (n=52) | P-value |
|---|---|---|---|
| Perfusion time (sec) | 10.34±1.96 | 5.96±1.47 | 0.01 |
| Perfusion intensity (e-0.02) | 4.15±2.03 | 2.83±1.46 | 0.02 |
| Time to peak (sec) | 26.73±7.26 | 16.38±3.58 | <0.01 |
| Peak intensity (e-0.02) | 6.73±4.21 | 10.42±5.47 | 0.03 |
| Wash-out time (sec) | 103.34±24.67 | 147.72±30.26 | 0.01 |
| Rising slope (1/sec) | 3.74±2.17 | 9.42±3.74 | 0.01 |
| Declining slope (1/sec) | 5.04±2.62 | 4.24±1.69 | 0.04 |
Values are expressed as the mean ± standard deviation. The perfusion time refers to the duration covering the period from the contrast agent entering the lesion (after the enhanced arterial phase) until the time that there was no significant difference between the lesion and surrounding normal tissues (after the vein phase).