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Table 4 Performance of CBF, QC, cQC, and aQC

From: A visual quality control scale for clinical arterial spin labeling images

  CBF cQC Total QC Total cQC aQC
Score 4/6 19/32 15/24 4/8
Sensitivity (%) 75 87 88 90
Specificity (%) 90 73 73 68
PPV (%) 91 84 83 81
NPV (%) 70 78 79 82
  1. aQC artifact-based quality control, cQC contrast-based quality control, CBF cerebral blood flow, NPV negative predictive value, PPV positive predictive value, QC quality control