Abstract #3227

Comparison of Undersampling Capability of Magnetic Resonance Fingerprinting Using Rosette and Variable Density Spiral Trajectories

Yuning Gu¹, Charlie Y. Wang¹, Yuchi Liu^1,2, Charlie Androjna³, and Xin Yu^1,2,4

¹Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States, ²Department of Radiology, Case Western Reserve University, Cleveland, OH, United States, ³Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, United States, ⁴Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, United States

The undersampling capability of magnetic resonance fingerprinting (MRF) using Rosette (ROS) and variable density spiral (VDS) trajectories was compared in this study. With a high undersampling factor, ROS-based MRF showed more uniform T₁ and T₂ mapping in phantoms with reduced errors. However, ROS reconstructed images of mouse brain showed slightly reduced SNR and off-resonance related artifacts, leading to similar undersampling capability as VDS-based MRF in vivo.

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