Single-Shot Propeller Turbo Spin Echo EPI with Model-Based Distortion Correction for Ultra Fast Abdominal T2 Mapping

Motivation: T2 mapping is limited by slow acquisition speed and/or are susceptible to motion artifacts, this study aims to develop a ultra fast T2 mapping technique for abdominal imaging. Goal(s): This study explores the possibility of using a single-shot propeller TSE EPI sequence for abdominal T2 mapping with model-based reconstruction technique for EPI distortion correction with a self-generated B0 map. Approach: The distortion technique is tested both on the brain and abdominal contrast images. T2 mapping with distortion correction is validated in the abdomen. Results: The proposed technique is able to generate distortion-corrected images, and provide accurate T2 maps of the liver. Impact: This preliminary study showed the feasibility to provide distortion-corrected T2 maps from a single-shot TSE EPI sequence with a speed of <0.5 seconds/slice. The early results showed that this technique can significantly reduce distortion and provide accurate liver T2 maps.