Definitions and calculations
True positive(TP); Truly identified pCR correctly identified as rCR
False positive (FP) Non-pCR incorrectly identified as rCR
True negative(TN) Non-pCR correctly identified as non rCR
False negative(FN) False negative(FN): pCR incorrectly identified as non rCR
Sensitivity image
Specificity image
Positive Predictive Value (PPV) image
Negative Predictive Value (NPV) image
Modality DM US D-MRI MRS
TP 11 17 24 23
FP 7 5 3 4
TN 93 95 97 96
FN 14 8 1 2
MRS D-MRI US DM Accuracy markers
92% 96% 68% 44% Sensitivity
92% 94% 90% 87% Specificity
85% 89% 77% 61% PPV
97% 99% 92% 87% NPV
Table 6: Definitions, calculations and accuracy measures of different imaging modalities as regards the prediction of pCR in patients receiving NAC.
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