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Table 1 Correlations between 1Dir, 3Dir PC-MRI and SSFP cine imaging stroke volume at different acquisition levels above the aortic valve. A positive bias was observed for 1Dir PC-MRI while a smaller negative bias was observed for 3Dir PC-MRI.

From: Peak velocity estimation in aortic stenosis patients using a fast three-directional two-dimensional phase contrast technique in a single breath-hold: comparison to unidirectional phase contrast MRI and transthoracic echocardiography

  Plane 0 Plane1 Plane2
  ρc Bias ± SD (ml) ρc Bias ± SD (ml) ρc Bias ± SD (ml)
1Dir PC-MRI 0.85 7 ± 15 0.88 5 ± 12 0.88 4 ± 12
3Dir PC-MRI 0.89 -2 ± 13 0.89 -3 ± 12 0.86 -4 ± 14
  1. ρc: Lin's Concordance Correlation Coefficient