Abstract #1266

Single-sided magnet design for an MR guided lumbar puncture (LP) device

Clarissa Zimmerman Cooley^1,2, Patrick C McDaniel^1,3, Jason P Stockmann^1,2, Farrah J Mateen^2,4, and Lawrence L Wald^1,2,5

¹Athinoula A Martinos Center for Biomedical Imaging, Dept. of Radiology, Massachusetts General Hospital, Charlestown, MA, United States, ²Harvard Medical School, Boston, MA, United States, ³Dept. of Electrical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁴Dept. of Neurology, Massachusetts General Hospital, Boston, MA, United States, ⁵Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, United States

Lumbar Punctures (LP) are generally guided by palpation only without visualization of the internal anatomy, leading to repeat attempts and/or avoidance in difficult cases. Image guidance with US and X-ray is possible, but US has poor depth and CSF contrast and radiation from X-ray complicates Point of Care (POC) use. We present a magnet design for a POC MR guided LP device that will couple to a mechanical track for needle insertion. The single-sided magnet is an NdFeB array and achieves a 40mT field and ~50mT/m built-in gradient in the ROI. Simulations of the magnet and imaging procedure are presented.

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