Table 3. Sensitivity, Specificity, and Accuracy of Diagnostic Performance Using Routine MR Image Only (A), Addition of DWI with b Value of 400 (B), and Addition of DWI with b Value of 1000 (C).
| Images | Sensitivity (%) | Specificity (%) | Accuracy (%) | |||
|---|---|---|---|---|---|---|
| 1.5T | 3T | 1.5T | 3T | 1.5T | 3T | |
| A | 73.9 (17/23), 78.3 (18/23) |
66.7 (14/21), 76.2 (16/21) |
82.6 (19/23), 95.7 (22/23) |
84.2 (16/19), 90.5 (19/21) |
78.3 (36/46), 87.0 (40/46) |
75.0 (30/40), 87.5 (35/40) |
| B | 95.7 (22/23), 91.3 (21/23) |
95.2 (20/21), 81.0 (17/21) |
95.7 (22/23), 95.7 (22/23) |
89.5 (17/19), 94.7 (18/19) |
95.7 (22/23), 93.5 (43/46) |
92.5 (37/40), 87.5 (35/40) |
| C | 100.0 (23/23), 95.7 (22/23) |
95.2 (20/21), 85.7 (18/21) |
95.7 (22/23), 95.7 (22/23) |
78.9 (15/19), 94.7 (18/19) |
97.8 (45/46), 95.7 (22/23) |
87.5 (35/40), 90.0 (36/40) |
| P | ||||||
| A vs. B | 0.051, 0.414 | 0.050, 0.998 | 0.340, 0.467 | 0.599, 0.994 | 0.016, 0.484 | 0.028, 0.735 |
| A vs. C | 0.014, 0.189 | 0.050, 0.696 | 0.340, 0.467 | 0.657, 0.469 | 0.005, 0.266 | 0.141, 0.735 |
| B vs. C | 0.991, 0.994 | 0.470, 0.996 | 0.467, 0.467 | 0.599, 0.994 | 0.984, 0.996 | 0.671, 0.709 |
Reader 1, reader 2. DWI = diffusion weighted image