Table 5. Multiphase CT attenuation in the irradiated hepatic parenchyma in subgroups according to single HCC vs. multiple HCCs.
| Subgroups | Time interval | CT attenuation | Phase | |||
| Noncontrast | Arterial | Portal | Delayed | |||
| Single | 1 month | Low | 14 (28.0%) | 3 (6.0%) | 8 (16.0%) | 1 (2.0%) |
| (n = 50) | Iso | 36 (72.0%) | 42 (84.0%) | 36 (72.0%) | 42 (84.0%) | |
| High | 0 (0%) | 5 (10.0%) | 6 (12.0%) | 7 (14.0%) | ||
| 3 months | Low | 32 (64.0%) | 7 (14.0%) | 12 (24.0%) | 2 (4.0%) | |
| Iso | 18 (36.0%) | 21 (42.0%) | 16 (32.0%) | 23 (46.0%) | ||
| High | 0 (0%) | 22 (44.0%) | 22 (44.0%) | 25 (50.0%) | ||
| 6 months | Low | 39 (78.0%) | 5 (10.0%) | 8 (16.0%) | 0 (0%) | |
| Iso | 10 (20.0%) | 18 (36.0%) | 13 (26.0%) | 23 (46.0%) | ||
| High | 1 (2.0%) | 27 (54.0%) | 29 (58.0%) | 27 (54.0%) | ||
| P Values | <.01. | <.01 | <.01 | <.01 | ||
| Multiple | 1 month | Low | 2 (18.2%) | 0 (0%) | 1 (9.1%) | 0 (0%) |
| (n = 11) | Iso | 9 (81.8%) | 9 (81.8%) | 8 (72.7%) | 10 (90.9%) | |
| High | 0 (0%) | 2 (18.2%) | 2 (18.2%) | 1 (9.1%) | ||
| 3 months | Low | 9 (81.8%) | 0 (0%) | 0 (0%) | 0 (0%) | |
| Iso | 2 (18.2%) | 5 (45.5%) | 4 (36.4%) | 6 (54.5%) | ||
| High | 0 (0%) | 6 (54.5%) | 7 (63.6%) | 5 (45.5%) | ||
| 6 months | Low | 9 (81.8%) | 0 (0%) | 0 (0%) | 0 (0%) | |
| Iso | 2 (18.2%) | 5 (45.5%) | 3 (27.3%) | 7 (63.6%) | ||
| High | 0 (0%) | 6 (54.5%) | 8 (72.7%) | 4 (36.4%) | ||
| P Values | <.01 | .17 | .04 | .24 | ||
Data are number of patients with percentages in parentheses. Sum of the percentages may not be 100% due to rounding of the numbers.