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.