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Abstract #2175

Optimized refocusing flip angles for efficient single-shot fast spin echo imaging

Manojkumar Saranathan 1 , Andreas M Loening 1 , Daniel V Litwiller 2 , Pauline W Worters 3 , and Shreyas Vasanawala 1

1 Department of Radiology, Stanford University, Stanford, CA, United States, 2 Global MR Applications and Workflow, GE Healthcare, Rochester, MN, United States, 3 Global MR Applications and Workflow, GE Healthcare, Menlo Park, CA, United States

Single shot T2-weighted imaging methods like SSFSE and HASTE are robust to patient motion but suffer from specific absorption rate (SAR) limitations, reducing their efficiency at 3T due to lengthened TRs. We investigated the use of a variable refocusing flip angle scheme for SSFSE, which enabled significant reduction in TR while preserving image quality. This new sequence called vrfSSFSE was optimized to reduce SAR and maximize SNR for imaging the biliary/pancreatic ducts and the female pelvis and compared to conventional SSFSE imaging.

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