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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