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Table 2 Spearman’s correlation coefficient between the first (QC) and second (items) columns for raters individually (columns 3,4 and 5) and for all raters in the last column

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

QC Item Rater 1 Rater 2 Rater 3 All
cQC CBF 0.85 0.78 0.60 0.75
cQC R1 0.59 0.46 0.56 0.48
cQC aBV 0.57 0.40 0.36 0.42
cQC ATT 0.48 0.56 0.36 0.46
QC Total cQC 0.80 0.74 0.60 0.70
aQC Motion 0.70 0.56 0.65 0.62
aQC Signal dropout 0.24 0.28 0.44 0.29
aQC Distortion 0.21 0.25 0.22 0.22
aQC Bright spots 0.58 0.63 0.26 0.48
  1. aBV arterial blood volume ATT arterial transit time, CBF cerebral blood flow, aQC artifact-based quality control, cQC contrast-based quality control, R1 T1 relaxation rate