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Abstract #1351

Cardiac Triggering Suppresses Heart-Motion Artifacts in Hyperpolarized-Gas Lung PO2 Maps

G. Wilson Miller1, John P. Mugler III1, Talissa A. Altes1, Jaime F. Mata1, Kai Ruppert1, F. William Hersman2, Jan Distelbrink2, Iulian C. Ruset2

1Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States; 2Xemed LLC, Durham, NH

Lung pO2 maps generated from T1-weighted hyperpolarized-gas MR images often show unphysiological pO2 values in the vicinity of the heart. These anomalous values are thought to result from cardiac motion during the breath-hold acquisition. We demonstrate that such artifacts can largely be eliminated by synchronizing image acquisition with the cardiac cycle.