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Abstract #1012

Low-distortion Spine DWI with Ultra-high Shot and Navigator-free Reconstruction

Chen Qian1, Mingyang Han1, Feiqiang Guan1, Yucheng Guo1, Zhigang Wu1, Jiangzheng Wang2, Boyu Jiang3, Ran Tao3, Liuhong Zhu4, Di Guo5, Jianjun Zhou4, and Xiaobo Qu1
1Xiamen University, Xiamen, China, 2Philips Healthcare, Beijing, China, 3United Imaging Healthcare, Shanghai, China, 4Department of Radiology, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, China, 5Xiamen University of Technology, Xiamen, China

Synopsis

Keywords: Diffusion Reconstruction, Diffusion/other diffusion imaging techniques

Motivation: State-of-the-art low-rank methods recover multi-shot DWI with 2D structured matrix completion, but are hindered by long computation time (tens of minutes per image) and unsatisfactory ultra-high shot reconstruction (no more than 8-shot).

Goal(s): Fast and reliable ultra-high (above 8-shot) DWI reconstruction.

Approach: ODLRS: A 1D low-rank Hankel reconstruction method with self-adaptive subspace.

Results: ODLRS is a novel 1D low-rank framework for multi-shot DWI reconstruction. Compared to conventional low-rank methods, ODLRS achieves 109 times accelerated reconstruction, and low-distortion spine DWI with 12 shots.S

Impact: This work achieves fast (109 times acceleration) and reliable ultra-high (10 and 12 shots) DWI reconstruction, reducing the deformation of conventional spinal cord DWI significantly.

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Keywords