Table 2:
Diagnostic accuracy of MR imaging and CT in evaluating bone invasion
| TP |
TN |
FP |
FN |
Sensitivity |
Specificity |
PPV |
NPV |
Accuracy |
|
|---|---|---|---|---|---|---|---|---|---|
| No. of Cases | % | ||||||||
| Mandibular cortical invasion | |||||||||
| MR imaging | 24 | 14 | 12 | 1 | 96 | 54* | 67 | 93 | 74 |
| CT | 25 | 23 | 3 | 0 | 100 | 88* | 89 | 100 | 94 |
| Bone marrow involvement | |||||||||
| MR imaging | 24 | 21 | 5 | 1 | 96 | 81 | 83 | 95 | 88 |
| CT | 25 | 23 | 3 | 0 | 100 | 88 | 89 | 100 | 94 |
| Inferior alveolar canal involvement | |||||||||
| MR imaging | 5 | 32 | 14 | 0 | 100 | 70† | 26 | 100 | 73 |
| CT | 5 | 44 | 2 | 0 | 100 | 96† | 71 | 100 | 96 |
Note:—TP indicates true-positive; TN, true-negative; FP, false-positive; FN, false-negative; PPV, positive predictive value; NPV, negative predictive value.
*
P = .004;
†
P = .002 (McNemar test).