Abstract #3715

Correction of off-resonance for T1 and T2 mapping using phase-cycled inversion-recovery balanced steady state free precession

Eric R. Muir¹ and Shengwen Deng^2,3

¹Research Imaging Institute and Ophthalmology, University of Texas Health Science Center, San Antonio, TX, United States, ²Research Imaging Institute, University of Texas Health Science Center, San Antonio, TX, United States, ³Biomedical Engineering, University of Texas at San Antonio, San Antonio, United States

Fast measurement of T1 and T2 can be made using inversion-recovery Look-Locker (LL) bSSFP methods. However, the LL-bSSFP signal is dependent on the off-resonance frequency which can affect calculated T1 and T2. In this study we develop and test methods to correct for effects of off-resonance on T1 and T2 calculation using multiple phase-cycled LL-bSSFP. The phase-cycled LL-bSSFP data could be combined with a maximum-T1* projection method to improve T1 and T2 accuracy in the case of off-resonance.

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