Abstract #3216

Robust GRAPPA Calibration in Phase Cycled bSSFP

Corey Allan Baron¹, Tiffany Jou¹, Anjali Datta¹, John M Pauly¹, and Dwight G. Nishimura¹

¹Electrical Engineering, Stanford University, Stanford, CA, United States

In phase cycled bSSFP, there is considerable motivation to use undersampling to mitigate long scan times. Direct application of a GRAPPA or SPIRiT reconstruction involves performing calibration separately for each phase cycled image. However, the receiver sensitivities are equivalent for all phase cycles, and this redundancy should be accounted for to improve calibration quality. Here, we describe a method for calculation of a single GRAPPA kernel over all phase cycles simultaneously, which is shown to improve calibration quality.

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