Abstract #3785

Hybrid-space reconstruction for simultaneous multi-slab DWI with blipped-CAIPI

Jieying Zhang¹, Simin Liu¹, and Hua Guo¹

¹Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China

Synopsis

Keywords: Image Reconstruction, Diffusion Tensor Imaging

3D simultaneous multi-slab imaging (SMSlab) can achieve high-resolution DWI with high SNR efficiency. Multi-band acceleration can also achieve less SNR reduction. Recently, we integrated SMSlab DWI with blipped-CAIPI gradients to reduce the g-factor penalty and proposed a 4D k-space framework (k_x-k_y-k_z-k_m) to model the signal encoding, with k_m representing the multi-band encoding. Because the blipped-CAIPI gradients are applied along the slice direction, they introduce k_z deviations from the nominal k-space location. This study proposed a hybrid-space reconstruction algorithm, REACH, to solve the phase interferences introduced by the blipped-CAIPI gradients.

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