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Table 2 Sensitivity, specificity, PPV, NPV, and accuracy of the SBRs with and without the CSF-mask algorithm

From: Impact of the cerebrospinal fluid-mask algorithm on the diagnostic performance of 123I-Ioflupane SPECT: an investigation of parkinsonian syndromes

  Sensitivity (%) Specificity (%) PPV (%) NPV (%) Accuracy (%)
Non-CSF-mask (NC) 86.5 (141/163) 77.8 (123/158) 80.1 (141/176) 84.8 (123/145) 82.2 (264/321)
CSF-mask (NC) 88.3 (144/163) 81.0 (128/158) 82.8 (144/174) 87.1 (128/147) 84.7 (272/321)
Non-CSF-mask (AC) 84.7 (138/163) 82.9 (131/158) 83.6 (138/165) 84.0 (131/156) 83.8 (269/321)
CSF-mask (AC) 84.0 (137/163) 91.8 (145/158) 91.3 (137/150) 84.8 (145/171) 87.9 (282/321)
  1. PPV positive predictive value, NPV negative predictive value, CSF cerebrospinal fluid, SBR specific binding ratio, NC no correction, AC attenuation correction