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Abstract #3670

Prospective Projection-Based Respiratory Whole-Heart Coronary MRI with Patient-Specific Tracking Factor

Mehdi Hedjazi Moghari1, Peng Hu1, Christian Stoeck2, Jouke Smink3, Dana C. Peters1, Beth Goddu1, Lois Goepfert1, Warren J. Manning1, Reza Nezafat1

1Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States; 2University and ETH, Biomedical Engineering, Zurich, Switzerland; 3Philips-Healthcare, Best, Netherland

The impact of correct subject-dependent slice tracking factor in whole-heart coronary imaging is studied in this paper. In preparation phase, two projection-based respiratory navigators are positioned at the diaphragm edge and center of heart to calculate the slice tracking factor. The projection-based navigator at the diaphragm with the estimated scale factor is employed for the whole-heart coronary image reconstruction. The constructed images outperform the ones acquired with the pencil beam navigator with the constant scale factor 0.6.