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Abstract #3117

Multi-parametric imaging in muscle based on chemical shift encoded multi-echo variable flip angle sequence: initial experience at 5T system

Hao Peng1, Chuanli Cheng1, Qian Wan1, Ziyun Guan2, Zhen Zhang2, Xin Liu1, Hairong Zheng1, and Chao Zou1
1Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences, Shenzhen, China, 2Shanghai United Imaging Healthcare Co., LTD, Shanghai, China

Synopsis

Keywords: Data Processing, Relaxometry, Ultrahigh field MRI

Motivation: Water T1 (wT1) has been shown to be a sensitive biomarker for muscle disease in the 3T system.

Goal(s): The aim of this work was to investigate the feasibility of simultaneous wT1/PDFF/R2* imaging in the 5T system.

Approach: Simultaneous multi-parametric imaging was achieved using chemical shift encoded multi-echo variable flip angle (CSE-VFA) sequences combined with B1 measurement techniques.

Results: Corrected by the preTFL approach, homogeneous wT1 maps are obtained even under B1 varying from 0.37 to 1.12.

Impact: In this work we have tested the feasibility of simultaneous quantification of wT1/PDFF/R2* in the 5T imaging system. This work has laid the foundation for subsequent research into the clinical significance of extracellular volume fraction.

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