Table 3. ADC values (×10−3 mm2/s) of the liver and focal hepatic lesions.
| Classification of lesions | ADCs | Unenhanced (×10−3 mm2/s) | Enhanced (×10−3 mm2/s) | P value | Z value |
|---|---|---|---|---|---|
| HCC | ADC(50) | 4.24±3.40 | 3.95±2.88 | 0.352 | −0.931 |
| ADC(800) | 1.43±0.59 | 1.42±0.61 | 0.322 | −0.990 | |
| ADC(1000) | 1.29±0.44 | 1.26±0.41 | 0.533 | −0.623 | |
| ADC(1200) | 1.23±0.41 | 1.22±0.43 | 0.658 | −0.443 | |
| Metastases | ADC(50) | 4.07±2.33 | 3.73±2.7 | 0.198 | −1.286 |
| ADC(800) | 1.41±0.24 | 1.37±0.30 | 0.126 | −1.530 | |
| ADC(1000) | 1.19±0.23 | 1.17±0.26 | 0.305 | −1.026 | |
| ADC(1200) | 1.23±0.25 | 1.14±0.29 | 0.085 | −1.721 | |
| Cysts | ADC(50) | 4.29±2.10 | 5.72±4.27 | 0.239 | −1.177 |
| ADC(800) | 2.73±0.76 | 2.80±0.78 | 0.530 | −0.628 | |
| ADC(1000) | 2.68±0.74 | 2.64±0.71 | 0.209 | −1.255 | |
| ADC(1200) | 2.55±0.76 | 2.56±0.69 | 0.814 | −0.236 | |
| Hemangiomas | ADC(50) | 2.81±1.13 | 2.71±1.13 | 0.099 | −1.649 |
| ADC(800) | 2.27±1.33 | 2.07±0.55 | 0.239 | −1.177 | |
| ADC(1000) | 2.04±0.67 | 1.93±0.62 | 0.285 | −1.069 | |
| ADC(1200) | 1.91±0.84 | 1.86±0.63 | 0.504 | −0.669 | |
| Malignant lesions | ADC(50) | 4.19±3.10 | 3.88±2.81 | 0.129 | −1.518 |
| ADC(800) | 1.43±0.51 | 1.40±0.53 | 0.115 | −1.577 | |
| ADC(1000) | 1.26±0.39 | 1.23±0.37 | 0.278 | −1.084 | |
| ADC(1200) | 1.23±0.36 | 1.20±0.39 | 0.085 | −1.724 | |
| Benign lesions | ADC(50) | 3.55±1.82 | 3.99±3.56 | 0.864 | −0.171 |
| ADC(800) | 2.40±0.73 | 2.42±0.81 | 0.797 | −0.257 | |
| ADC(1000) | 2.30±0.77 | 2.27±0.85 | 0.088 | −1.704 | |
| ADC(1200) | 2.20±0.85 | 2.27±0.77 | 0.448 | −0.758 | |
| All lesions | ADC(50) | 4.04±2.82 | 3.91±3.00 | 0.151 | −1.431 |
| ADC(800) | 1.68±0.71 | 1.67±0.76 | 0.163 | −1.394 | |
| ADC(1000) | 1.53±0.69 | 1.50±0.70 | 0.078 | −1.765 | |
| ADC(1200) | 1.48±0.66 | 1.48±0.70 | 0.294 | −1.049 | |
| Liver | ADC(50) | 8.61±10.21 | 7.86±2.88 | 0.005* | −2.784 |
| ADC(800) | 1.46±0.27 | 1.39±0.25 | 0.015* | −2.431 | |
| ADC(1000) | 1.38±0.25 | 1.33±0.27 | 0.028* | −2.199 | |
| ADC(1200) | 1.32±0.23 | 1.26±0.22 | 0.016* | −2.400 |
*, b=50 (NEX =1), 800 (NEX =4), 1,000 (NEX =4), 1,200 (NEX =4) s/mm2. ADC, apparent diffusion coefficient; HCC, hepatocellular carcinoma; NEX, number of excitations.