Fig. 5From: Using a respiratory navigator significantly reduces variability when quantifying left ventricular torsion with cardiovascular magnetic resonanceThe nine possible torsion permutations were constructed from three basal and three apical images. One basal and apical image was acquired for each subject-specific end-expiratory position (maximum, middle, and minimum). Image acquisitions were repeated at the middle position to assess inter-test variability (far right)Back to article page