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- W2087213967 abstract "Abstract Purpose: To evaluate a novel soft, lightweight cushion that can match the magnetic susceptibility of human tissue. The magnetic susceptibility difference between air and tissue produces field inhomogeneities in the B 0 field, which leads to susceptibility artifacts in magnetic resonance imaging (MRI) studies. Materials and Methods: Pyrolytic graphite (PG) microparticles were uniformly embedded into a foam cushion to reduce or eliminate field inhomogeneities at accessible air and tissue interfaces. 3T MR images and field maps of an air/water/PG foam phantom were acquired. Q measurements on a 4T tuned head coil and pulse sequence heating tests at 3T were also performed. Results: The PG foam improved susceptibility matching, reduced the field perturbations in phantoms, does not heat, and is nonconductive. Conclusion: The susceptibility matched PG foam is lightweight, safe for patient use, adds no noise or MRI artifacts, is compatible with radiofrequency coil arrays, and improves B 0 homogeneity, which enables more robust MR studies. J. Magn. Reson. Imaging 2010;32:684–691. © 2010 Wiley‐Liss, Inc." @default.
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- W2087213967 date "2010-08-27" @default.
- W2087213967 modified "2023-10-12" @default.
- W2087213967 title "Pyrolytic graphite foam: A passive magnetic susceptibility matching material" @default.
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- W2087213967 doi "https://doi.org/10.1002/jmri.22270" @default.
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