Correction of Magnetic Field Inhomogeneity Effects Using Conjugate Phase Reconstruction

Master thesis (2022)

Authors

Aggariyo Aggariyo Wanagiri Mechanical Engineering

Contributors

R.F. Remis Signal Processing Systems - EEMCS (mentor)
Kirsten Koolstra Leiden University Medical Center (mentor)
N.V. Budko Numerical Analysis - EEMCS (graduation committee member)
Faculty
Mechanical Engineering, Mechanical Engineering
Copyright: © 2022 Aggariyo Aggariyo Wanagiri
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Published Date

31-05-2022

Language

English

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Faculty

Mechanical Engineering

Abstract

Low field magnetic resonance imaging (MRI) scanners provide a unique low-cost alternative to conventional MRI scanners. Nevertheless, low-field scanners come with drawbacks such as reduced signal-to-noise ratio and resolution, and also distorted images caused by magnetic field inhomogeneity and non-linear gradient fields. Despite this, it still provides a more accessible way to provide MRI in resource-limited areas. The main goal of this thesis is to develop an algorithm that can reconstruct 3D data from the low-field scanner efficiently and without distortion to the image. To do this, conjugate phase reconstruction (CPR) is employed, particularly frequency segmented reconstruction (Noll, 1991) and multifrequency interpolation (Man et al., 1997).