There has long been a push for higher field MRI systems to increase magnetic polarization and therefore SNR. However, the development of MRI systems at low-field (< 0.1T) and ultra-low field (< 10mT) could lead to an overall increase in the accessibility of MRI in terms of cost and portability. An overview of low-field MRI system design and imaging aspects will be presented, and the advantages and disadvantages of low-field MRI compared to high-field MRI will be discussed.
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