Abstract #0061

Numerically Optimized Magnet Designs for a Portable, Low-Field Neonatal MRI Brain Scanner

Jacob M White^1,2, Monika Śliwiak², Sara V Bates^3,4, Jason P Stockmann^2,3, Lawrence L Wald^1,2,3, and Clarissa Z Cooley^2,3

¹Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, United States, ²A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States, ³Harvard Medical School, Boston, MA, United States, ⁴Division of Newborn Medicine, Department of Pediatrics, Massachusetts General Hospital, Boston, MA, United States

Synopsis

Point-of-care MRI scanners sited in the neonatal intensive care unit (NICU) can provide immense benefits for diagnosing and monitoring neonatal brain injury. While NICU sited systems can address some of the transport concerns, a truly portable “isolette-side” imager with a neonate-specific design could further improve imaging access. We present a neonate-specific lightweight MRI permanent magnet design for use at the bedside in the NICU. We examine two magnet designs demonstrating the feasibility of realizing a sufficiently homogeneous main magnet with mean B₀ of 125mT weighing under 15kg, both with and without a built-in gradient of 10mT/m.

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