US 12,290,323 B2
Point-of-care magnetic resonance imaging system for lumbar puncture guidance
Lawrence L. Wald, Cambridge, MA (US); Clarissa Zimmerman-Cooley, Boston, MA (US); and Patrick C. McDaniel, Boston, MA (US)
Assigned to The General Hospital Corporation, Boston, MA (US)
Appl. No. 17/996,852
Filed by The General Hospital Corporation, Boston, MA (US)
PCT Filed Apr. 26, 2021, PCT No. PCT/US2021/029193
§ 371(c)(1), (2) Date Oct. 21, 2022,
PCT Pub. No. WO2021/217144, PCT Pub. Date Oct. 28, 2021.
Claims priority of provisional application 63/015,266, filed on Apr. 24, 2020.
Prior Publication US 2023/0136830 A1, May 4, 2023
Int. Cl. A61B 34/20 (2016.01); A61B 5/00 (2006.01); A61B 5/055 (2006.01); G01R 33/38 (2006.01); G01R 33/383 (2006.01); G01R 33/385 (2006.01); A61B 17/34 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 5/004 (2013.01); A61B 5/055 (2013.01); G01R 33/3808 (2013.01); G01R 33/383 (2013.01); G01R 33/385 (2013.01); A61B 2017/3405 (2013.01); A61B 2560/0431 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A magnet assembly for a portable magnetic resonance imaging (MRI) system, the magnet assembly comprising:
a plurality of magnet blocks configured to create a single-sided permanent magnet, the plurality of magnet blocks being arranged in concentric rings in each of at least two layers to define a central aperture extending through the at least two layers, wherein the central aperture is sized to receive a medical instrument.