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Abstract #0021

2D Imaging in a Lightweight Portable MRI Scanner without Gradient Coils

Clarissa Zimmerman Cooley 1,2 , Jason P. Stockmann 1,3 , Brandon D. Armstrong 1,3 , Mathieu Sarracanie 1,3 , Michael H. Lev 4,5 , Matthew S. Rosen 1,3 , and Lawrence L. Wald 1,5

1 A. A. Martinos Center for Biomedical Imaging, Dept. of Radiology, Massachusetts General Hospital, Charlestown, MA, United States, 2 Dept. of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, 3 Dept. of Physics, Harvard University, Cambridge, MA, United States, 4 Dept. of Radiology, Massachusetts General Hospital, Boston, MA, United States, 5 Harvard Medical School, Boston, MA, United States

As the premiere modality for brain imaging, MRI could find wider applicability if lightweight, portable systems were available for siting in unconventional locations. We construct and validate a truly portable (<100kg) and silent proof-of-concept scanner which replaces conventional gradient encoding with a rotating lightweight low-field magnet. When rotated about the object, the inhomogeneous field pattern is used to create generalized projections which encode the iteratively reconstructed 2D image. The system is validated with experimental images of 2D test phantoms. This new scanner architecture demonstrates the potential for portability by simultaneously relaxing the magnet homogeneity criteria and eliminating the gradient coil.

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