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Measures of sensitivity, specificity, PPV, NPV, and accuracy of endorectal and external body coil MRSI ratios in discrimination of cancer from non-cancer with ROC curve analysis.
| Parameter | Endorectal coil | External phased array |
|---|---|---|
| CV | 1.35 | 0.77 |
| Sensitivity, % | 81.3 | 68.8 |
| Specificity, % | 75.0 | 81.3 |
| PPV% | 76.5 | 78.6 |
| NPV% | 80.0 | 72.2 |
| AUC, % | 86.9 | 85.9 |
| Accuracy, % | 78.1 | 75.0 |
Abbreviations: CV, cutoff value; PPV, positive predictive value; NPV, negative predictive value; AUC, area under the curve.
