Meeting Banner
Abstract #4276

A Rapid, Spiral Based VFA Approach to Simultaneous T1 and B1+ Mapping

Christopher Sica1, Christopher Collins1

1Radiology, Pennsylvania State University, Hershey, PA, United States

A method for simultaneous B1+ and T1 mapping is presented. The proposed method acquires a series of spoiled 3D GRE scans with fixed TR and variable flip angle between scans. A spiral acquisition with off-resonance correction is utilized to speed acquisition. Non-linear fitting is applied to the signal expression M 0 B1- (1-E1)sin[ FA(λθ, ∆B0) ] / (1 E1cos[ FA(λθ, ∆B0) ]) to obtain B1+ and T1. This method is compared to an inversion recovery based method to measure T1 in a set of doped water tubes, and agreement is on the order of several percent. In-vivo results from this technique are also presented.