From: Using a respiratory navigator significantly reduces variability when quantifying left ventricular torsion with cardiovascular magnetic resonance
Method
Sample size (n)
Experiment 1
 Enforced inconsistent positions
66
 Consistent positions with navigator
16
Experiment 2
 Breath-holds
26
15
Previous Studies
 CMR Tagging [3]
107
 CMR Feature Tracking [4]
81
 3D Speckle Tracking [5]
80