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Magnetic resonance imaging (MRI) is a non-invasive method capable of producing high spatial resolution images of body structures and identifying injuries. However, conventional MRI systems use large superconducting magnets (≥ 1Tesla) that require high operating costs, long exam times, metal free environments, and are impractical to transport. Portable MRI systems using ultra-low magnetic fields in the micro- to milli-tesla range with superconducting quantum interference device (SQUID) technology have been developed, but these systems generate low signal-to-noise ratios (SNR), requiring very long averaging times to obtain modest spatial resolution. The initial phase of this project involved the development of a low field MRI system and resulted in the preliminary design of a transportable low-field (0.1 Tesla) MRI system, which has the advantages of ultra-low and high field MRI systems while avoiding their disadvantages. The current phase of the project is developing a small-scale portable low-field MRI system prototype of the full sized system. Development of this technology will have significant applications in both commercial and military settings.

Dense Array, Low Field Magnetic Resonance Imaging Devices for Combat Casualty Care