Abstract #3945

Regularly Incremented Phase Encoding Magnetic Resonance Fingerprinting (RIPE-MRF) for Enhanced Motion Suppression in Cartesian MRF

Christian Anderson¹, Charlie Wang¹, Yuning Gu¹, Mark Griswold^1,2, Xin Yu^1,2,3, and Chris Flask^1,2,4

¹Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States, ²Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH, United States, ³Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, United States, ⁴Pediatrics, University Hospitals Cleveland Medical Center, Cleveland, OH, United States

Preclinical quantitative MRI is susceptible to the motion artifacts caused by the rapid respiratory motion and high heart rates present in small animals. This can be alleviated through the use of gating/triggering but these are difficult to implement in magnetic resonance fingerprinting due to the need for dynamic, coherent signal evolutions. We propose a method for an incremented phase encoding MRF acquisition that enhances motion suppression in Cartesian MRF. This phase incremented strategy distributes motion artifacts throughout the acquisition creating incoherent artifacts allowing the MRF method to “see through” the artifacts and produce artifact free T1 and T2 maps.

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