Design, Characterisation and Performance of an Improved Portable and Sustainable Low-Field MRI System

Bart de Vos, Javad Parsa, Zaynab Abdulrazaq, Wouter M. Teeuwisse, Camille D.E. Van Speybroeck, Danny H. de Gans, Rob F. Remis, Tom O’Reilly, Andrew G. Webb*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
84 Downloads (Pure)

Abstract

Low-field permanent magnet-based MRI systems are finding increasing use in portable, sustainable and point-of-care applications. In order to maximize performance while minimizing cost many components of such a system should ideally be designed specifically for low frequency operation. In this paper we describe recent developments in constructing and characterising a low-field portable MRI system for in vivo imaging at 50 mT. These developments include the design of i) high-linearity gradient coils using a modified volume-based target field approach, ii) phased-array receive coils, and iii) a battery-operated three-axis gradient amplifier for improved portability and sustainability. In addition, we report performance characterisation of the RF amplifier, the gradient amplifier, eddy currents from the gradient coils, and describe a quality control protocol for the overall system.

Original languageEnglish
Article number701157
Number of pages16
JournalFrontiers in Physics
Volume9
DOIs
Publication statusPublished - 2021

Keywords

  • gradient amplifier
  • gradient coil design
  • halbach magnet
  • low field MRI
  • MR hardware
  • quality control
  • RF amplifier
  • RF coil array

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