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Abstract #0529

Pseudo Partition-encoded Simultaneous Multislab (pPRISM) for Submillimeter Diffusion Imaging Without Navigator and Slab-Boundary Artifacts

Wei-Tang Chang1,2,3
1Radiology, UNC at Chapel Hill, Chapel Hill, NC, United States, 2Biomedical Research Imaging Center, UNC at Chapel Hill, Chapel Hill, NC, United States, 3Biomedical Engineering, UNC at Chapel Hill, Chapel Hill, NC, United States

Synopsis

Keywords: Pulse Sequence Design, Diffusion Tensor ImagingThe ability to achieve submillimter isotropic resolution diffusion MR imaging (dMRI) is critically important to study fine-scale brain structures. While the multi-shot approaches, including SMSlab and gSlider-SMS, have been proposed to mitigate the inherently low SNR, the SMSlab sequences require additional navigators for phase estimation and both SMSlab and gSlider-SMS suffered from the slab-boundary artifacts. This study proposed two new concepts: PRISM encoding and 2) pseudo slab in order to mitigate the slab-boundary artifacts and shorten the scan time. Together, this study achieved the dMRI with 0.86 mm isotropic resolution with 16.3%-43.6% reduction of scan time compared to gSlider.

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