5T cardiac cine imaging with selective PCA self-gating on normal and arrythmia subjects

Motivation: ECG has poor performance at high field and does not directly measure mechanical cardiac motion and ECG gated Cardiac MR (CMR) scans fail on arrhythmia patients. Goal(s): Our goal was to obtain the cardiac mechanical motion signal for arrhythmia cardiac cine imaging under free breathing at high field. Approach: We applied the selective PCA method developed by us to 2D cine imaging, assigning arrhythmia cardiac k-space data based on the mechanical cardiac motion. Results: The assigning of cardiac k-space data based on arrhythmia cardiac motion characteristics produced artifact-free 2D cine cardiac images, while the standard ECG-gating breath-hold technique resulted in severe artifacts. Impact: The selective PCA method yields cardiac and respiratory signals in 2D CMR imaging, acting as surrogates for ECG and belts in CMR scans. The achieved cardiac mechanical motion aids cardiac cine imaging in arrhythmic subjects.