Results of postoperative DECT image analysis with interreader concordance and subsequent consensus
| Reader 1 | Reader 2 | Interreader Concordance | Consensus | |
|---|---|---|---|---|
| Presence of parenchymal hyperdensity | ||||
| Yes | 53/85 (62.4%) | 53/85 (62.4%) | κ = 0.95; 95% CI, 0.882–1.000 | 54/85 (63.5%) |
| No | 32/85 (37.6%) | 32/85 (37.6%) | 31/85 (36.5%) | |
| Hyperdensity location | ||||
| DWM | 26/53 (49.1%) | 31/53 (58.5%) | κ = 0.745; 95% CI, 0.588–0.903 | 29/54 (53.7%) |
| DWM+cortical/subcortical | 21/53 (39.6%) | 16/53 (30.2%) | 18/54 (33.3%) | |
| Cortical/subcortical | 6/53 (11.3%) | 6/53 (11.3%) | 7/54 (13.0%) | |
| Hyperdensity homogeneity | ||||
| Homogeneous | 29/53 (54.7%) | 31/53 (58.5%) | κ = 0.799; 95% CI, 0.632–0.966 | 30/54 (55.6%) |
| Inhomogeneous | 24/53 (45.3%) | 22/53 (41.5%) | 24/54 (44.4%) | |
| Mean maximum attenuation (HU) | 100 (median 77, range 45–701) | 103 (median 76, range 47–789) | P = .999 | 74 (range, 47–745) |
| Presence of iodine extravasation | ||||
| Yes | 53/85 (62.4%) | 53/85 (62.4%) | κ = 0.976; 95% CI, 0.929–1.000 | 54/85 (63.5%) |
| No | 32/85 (37.6%) | 32/85 (37.6%) | 31/85 (36.5%) | |
| Mean maximum iodine concentration (mg/dL) | 3.0 (median,1.8; range 0.5–28.4) | 2.9 (median, 1.6; range 0.6–27.7) | P = .926 | 1.8 (range, 0.5–28.1) |
| Hemorrhage on VNC images | ||||
| Yes | 5/85 (5.9%) | 5/85 (5.9%) | κ = 1.000; 95% CI, 1.000–1.000 | 5/85 (5.9%) |
| No | 80/85 (94.1%) | 80/85 (94.1%) | 80/85 (94.1%) |
Note:—DWM indicates deep white matter.