Evaluation of diagnostic performance on combined pre- and postcontrast MR images relative to precontrast images alone
| End Point | Reader | Precontrast (n = 89) | Pre- + Postcontrast (n = 89) | P Valuea |
|---|---|---|---|---|
| Tumor vs nontumor | 1 | 75 (84.3%) | 84 (94.4%) | .003 |
| 2 | 67 (75.3%) | 81 (91.0%) | <.001 | |
| 3 | 78 (87.6%) | 82 (92.1%) | .046 | |
| Specific diagnosis | 1 | 52 (58.4%) | 65 (73.0%) | .003 |
| 2 | 47 (52.8%) | 63 (70.8%) | <.001 | |
| 3 | 50 (56.2%) | 59 (66.3%) | .02 |
↵a McNemar test.