Modality | Performance |
---|---|
V/Q SPECT | |
Sensitivity (%) | 97 (82–100) |
Specificity (%) | 88 (75–95) |
PPV (%) | 82 (65–93) |
NPV (%) | 98 (88–100) |
Accuracy (%) | 91 (83–93) |
Nondiagnostic rate (%) | 5 (1–12) |
V/Q SPECT plus low-dose CT | |
Sensitivity (%) | 97 (83–99) |
Specificity (%) | 100 (93–100) |
PPV (%) | 100 (88–100) |
NPV (%) | 98 (90–100) |
Accuracy (%) | 99 (93–100) |
Nondiagnostic rate (%) | 0 (0–4) |
Perfusion SPECT plus low-dose CT | |
Sensitivity (%) | 93 (81–98) |
Specificity (%) | 51 (43–55) |
PPV (%) | 57 (49–60) |
NPV (%) | 91 (76–98) |
Accuracy (%) | 68 (58–72) |
Nondiagnostic rate (%) | 17 (10–28) |
Pulmonary MDCT angiography | |
Sensitivity (%) | 68 (49–83) |
Specificity (%) | 100 (93–100) |
PPV (%) | 100 (84–100) |
NPV (%) | 83 (71–92) |
Accuracy (%) | 88 (78–94) |
Nondiagnostic rate (%) | 0 (0–4) |
PPV = positive predictive value; NPV = negative predictive value.
Values in parenthesis are 95% confidence intervals.