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Abstract #0072

Variable Flip Angle Radial Turbo Spin Echo Technique for Abdominal T2 Mapping

Mahesh Bharath Keerthivasan1, Manojkumar Saranathan2, Jean-Philippe Galons2, Diego R Martin2, Ali Bilgin1,2, and Maria Altbach2

1Electrical and Computer Engineering, University of Arizona, Tucson, AZ, United States, 2Medical Imaging, University of Arizona, Tucson, AZ, United States

The estimation of T2 relaxation times within lesions can provide a quantitative method of classifying abdominal neoplasms. Accelerated T2 mapping approaches have been proposed using the Radial TSE (RADTSE) sequence, where high resolution images at multiple TEs are reconstructed from data acquired in a single breath hold. However, the slice coverage for TSE based breath-held imaging is SAR restricted, motivating the need to reduce the refocusing flip angle. We present a variable refocusing flip angle RADTSE sequence designed to optimize the signal evolution for T2 mapping in the abdomen with reduced SAR, thereby increasing the slice coverage.

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