SENSE and GRAPPA Reconstruction of Multi-Shot Multi-Echo EPI Data
Newbould R, Skare S, Clayton D, Bammer R
We present both GRAPPA and SENSE reconstructions of multi-shot, multi-echo perfusion-weighted EPI with an effective reduction factor of 4. Although both require no user input and are generally robust to the choice of acquisition parameters, we show that a critical step for SENSE reconstruction is the method and parameters used for generating coil sensitivity maps. While GRAPPA reconstruction could be treated nearly as a black-box and demonstrates extremely robust and reliable performance in all cases treated here, the SENSE reconstruction required some refinement of the details involved in transforming the data from all shots into optimum sensitivity maps.