A TSVD-based Approach for Flexible Spatial Encoding Strategy in Portable Magnetic Resonance Imaging (MRI) System

摘要

Magnetic Resonance Imaging (MRI) has become one of the important biomedical modalities. However, conventional MRI system is very bulky (normally it takes two-rooms size) and expensive. A low-cost and portable MRI scanner may be useful in more diverse scenarios. A Halbach array based MRI system with flexible spatial nonlinear imaging strategy has been proposed with low cost and portability. In this paper, a Truncated Singular Value Decomposition (TSVD)-based approach is proposed for the flexible spatial nonlinear encoding strategy for a portable MRI. This method shows an improve Normalized Root Mean Square Error (NRMSE) compared to the existing solutions, such as the Kaczmarz iteration and the QR method when the system is noisy.