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Abstract #3704

TRASE Enforced and Accelerated Nonlinear Spatial Encoding for Low-field Portable MRI and its Local k-space Analysis

GONG JIA1, ZHOU WENSHEN1, YU WENWEI2, and HUANG SHAO YING1
1EPD, Singapore University of Technology, Singapore, Singapore, 2Chiba University, Chiba, Japan

We propose an encoding method which combines Transmit Array Spatial Encoding (TRASE) and spatial encoding magnetic field (SEM) to improve the image quality in a permanent-magnet-array (PMA)-based low-field portable MRI system with acceleration. TRASE is used to introduce phase shift to re-arrange the signal points in local k-spaces, to gain more information quicker to increase imaging quality and speed. A significant quality improvement can be achieved in the reconstructed images, especially in the central regions, which is shown numerically. The number of rotation angles is reduced 80% for the same image quality. The experiments are being conducted for a validation.

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