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Abstract #1165

Accurate Quantitative G-factor Calculation in Dual-kernel Slice-GRAPPA Reconstruction

Wei Liu1, Simon Bauer2, and Stephan Kannengiesser2
1Siemens Shenzhen Magnetic Resonance Ltd, Shenzhen, China, 2Siemens Healthcare GmbH, Erlangen, Germany

We describe a more accurate analytical method to calculate the g-factor in dual kernel Slice-GRAPPA (SG-DK) reconstruction for blipped-CAIPI simultaneous multi-slice EPI data. To account for the effect of EPI phase correction, the Slice-GRAPPA kernels are phase corrected before the combination with the in-plane GRAPPA kernel. The experimental results based on a phantom study highlight that there is excellent agreement between SNR maps calculated with the standard pseudo multiple-replica method and the proposed method.

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