Claudio Santelli1, Reza Nezafat1, Warren J. Manning1,2, Sebastian Kozerke3, Dana C. Peters1
1Cardiology, Beth Israel Deaconess Medical Center, Boston, MA , United States; 2Radiology, Beth Israel Deaconess Medical Center, Boston, MA, United States; 3D-ITET, ETH Zurich, Institute for Biomedical Engineering, Zurich, Switzerland
We evaluated the relationship between the respiratory bellows, placed on the chest, and the abdomen, and the superior-inferior displacement of the navigator signal, the lung-liver interface, and the heart, in single-heart-beat ECG-gated images. The diaphragmatic bellows correlated better than the chest wall bellows, and bellows correlated best with the navigator. Using a bellows based criteria, 3D coronary MRI was reconstructed retrospectively, based on the bellows data only. Our preliminary experience suggests that bellows-gating should be revisited.