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Abstract #2647

Edge-Guided Reconstruction of Multi shot Diffusion MRI Using Projection Iteration Threshold Deep Network

Xia Liu1, Hongyu Guo1, Chunzhu Luan1, and Hongmiao Zhang1
1Shenyang University of Technology, Shengyang, China

Synopsis

Keywords: AI/ML Image Reconstruction, AI/ML Image Reconstruction

Motivation: Diffusion weighted MRI (DWI) captures information about the diffusion of water molecules by the application of strong bipolar gradients. It suffers from distortions in single-shot echo-planar imaging (ssEPI) due to B0 inhomogeneity and rapid signal decay. Multi-shot EPI (msEPI) enhances resolution but is affected by phase inconsistencies from motion artifacts.

Goal(s): To tackle phase variation issues across shots in msEPI, this study introduces EPISTA+.

Approach: The proposed approach unfolds the projection iteration algorithm1 into a deep network, integrating physical reconstruction models and image edge2 constraints for layer-wise recursive optimization.

Results: Experimental results demonstrate EPISTA+ outperforms other deep learning methods in reconstructing high-quality images.

Impact: This study introduced EPISTA+, a deep learning technique that integrates physical reconstruction model with image edge constraints to enhance the image quality of multi-shot DWI. This method improves image quality of high-resolution DWI and enhances diagnostic reliability in clinical settings.

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Keywords