Abstract #3953

Accelerated Rosette Spectroscopic Imaging with semi-LASER Localization

Ajin Joy¹, Uzay Emir^2,3, Paul M. Macey⁴, and M. Albert Thomas¹

¹Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States, ²School of Health Sciences, Purdue University, West Lafayette, IN, United States, ³Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States, ⁴School of Nursing and Brain Research Institute, University of California, Los Angeles, Los Angeles, CA, United States

Synopsis

Keywords: Data Processing, BrainLimiting the total data acquisition time to a clinically feasible runtime has been a major challenge in MR spectroscopic imaging. Recently rosette based non-cartesian encoding of k-space has been used for spectroscopic imaging due to their fast encoding speed and lower gradient/slew rate requirements. While rosette spectroscopic imaging has been attempted for 2D and 3D spectroscopic imaging, feasibility of undersampling the petals in rosette is not shown. In this study, we implemented a rosette 2D and 3D spectroscopic imaging sequence and shown the feasibility of acceleration factors up to 8x using compressed sensing reconstruction.

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