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Table 1 Comparison between semi-automatic and manual analyses of coronary blood flow parameters (mean +/−SD of paired differences, intraclass correlation coefficient (ICC)) in 15 vessels, together with inter-observer reproducibility (semi-automatic method) of the same variables

From: Validation of high temporal resolution spiral phase velocity mapping of temporal patterns of left and right coronary artery blood flow against Doppler guidewire

  MANUAL VERSUS SEMI-AUTOMATIC ANALYSIS INTER-OBSERVER REPRODUCIBILITY (SEMI-AUTOMATIC ANALYSIS)
  mean +/−SD mean (+/−SD) differences ICC mean +/−SD mean (+/−SD) differences ICC
mean velocity (mm/s) 78.7+/−25.8 −0.9+/−9.8 0.93 81.0+/−23.9 −3.7+/−7.3 0.95
flow (ml/min) 54.9+/−23.7 −10.5+/−11.0* 0.81 61.4+/−26.3 −2.7+/−5.7 0.98
PSV (mm/s) 72.5+/−35.2 −1.7+/−17.0 0.98 74.5+/−33.1 −1.4+/−16.0 0.98
TPSV (ms) 115.3+/−57.3 5.5+/−19.4 0.94 114.1+/−55.6 −1.9+/−13.3 0.97
PDV (mm/s) 171.0+/−75.4 −1.3+/−24.7 0.95 173.1+/−69.9 −3.3+/−16.2 0.98
TPDV (ms) 515.2+/−95.1 −3.0+/−50.2 0.90 521.4+/−106.7 −9.4+/−28.5 0.96
  1. The means of the manual and semi-automatic values (+/−SD) and of the two observers values are included for reference. The ICC is calculated for absolute agreement (single measure). MV mean velocity, PSV peak systolic velocity, TPSV time to peak systolic velocity, PDV peak diastolic velocity and TPDV time to peak diastolic velocity. (* p < .001)