Table 2.
Comparisons of mean values and standard deviations of T1 relaxation time and apparent diffusion coefficient (ADC) value between MVI-negative and MVI-positive groups of hepatocellular carcinoma
| All (n = 94) | MVI | P value | ICC (95% CI)a | ||
|---|---|---|---|---|---|
| Negative (n = 56) | Positive (n = 38) | ||||
| T1 relaxation time | |||||
| Pre-contrast | 0.823 (0.744–0.879) | ||||
| Observer 1 | 1040.9 | 1065.9 | 1004.2 | 0.095 | |
| SD | 175.6 | 191.2 | 144.3 | ||
| Observe 2 | 1079.2 | 1094.2 | 1057.1 | 0.283 | |
| SD | 163.5 | 149.9 | 181.4 | ||
| Mean | 1060.1 | 1080.0 | 1030.6 | 0.148 | |
| SD | 161.9 | 163.6 | 156.9 | ||
| Postcontrast | 0.858 (0.786–0.906) | ||||
| Observe 1 | 578.1 | 548.5 | 621.7 | 0.001 | |
| SD | 107.9 | 102.3 | 102.2 | ||
| Observe 2 | 563.2 | 524.5 | 620.3 | < 0.001 | |
| SD | 117.1 | 103.8 | 113.3 | ||
| Mean | 570.6 | 536.5 | 621.0 | < 0.001 | |
| SD | 105.4 | 95.6 | 99.8 | ||
| Reduction rate (%) a | 45.7 | 49.9 | 39.4 | < 0.001 | |
| SD | 9.2 | 8.0 | 7.1 | ||
| ADC | 0.759 (0.637–0.840) | ||||
| Observe 1 | 1571.5 | 1597.4 | 1533.3 | 0.134 | |
| SD | 194.4 | 175.6 | 216.0 | ||
| Observe 2 | 1568.7 | 1643.9 | 1457.8 | < 0.001 | |
| SD | 257.1 | 233.6 | 252.6 | ||
| Mean | 1570.1 | 1620.7 | 1495.6 | 0.003 | |
| SD | 204.6 | 194.3 | 198.8 | ||
MVI Microvascular invasion, SD Standard deviations, CI Confidence intervals, ICC Interclass correlation coefficient, ADC Apparent diffusion coefficient
a The ICC was not calculated because reduction rate of T1 relaxation was based on the mean values of precontrast and postcontrast T1 relaxation time of the two readers