Figure 2.

The sensitivity, specificity, and accuracy of each group for the three histological types. Sensitivity: the four methods were highly sensitive to normal histological types, but there was no significant difference. The MRI group had the highest sensitivity (68.4, 95% CI: 43.5–87.4%) in the group of patients with histologically confirmed hyperplasia, and the differences were significant compared with those of the CT group (14.3, 95% CI: 0.4–57.9%) and the contrast CT group (26.7, 95% CI: 7.8–55.1%). There was no significant difference among the CT group, CT group and contrast CT group. All four groups showed 100% sensitivity. For patients with histologically confirmed thymoma, no significant differences were found. Specificity: for hyperplasia patients, the specificity of contrast CT (97.9, 95% CI: 88.9–99.95%) was better than that of MRI (88.5, 95% CI: 69.9–97.6%), and the difference between the two groups was significant. There were no significant differences between the other groups. Accuracy: the four groups showed very similar accuracy measurements between each of the three histological types, and there were no significant differences between the groups.( *Two groups were significantly different).