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https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00029102
2022-04-27T08:57:29Z
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Magnetic field shimming of a permanent magnet using a combination of pieces of permanent magnets and a single-channel shim coil for skeletal age assessment of children
寺田, 康彦
巨瀬, 勝美
Terada, Y.
Kono, S.
Ishizawa, K.
Inamura, S.
Uchiumi, T.
Tamada, D.
Kose, K.
© 2013 Elsevier Inc.NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Magnetic Resonance. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Magnetic Resonance, VOL230, May 2013 DOI:10.1016/j.jmr.2013.02.005
We adopted a combination of pieces of permanent magnets and a single-channel (SC) shim coil to shim the magnetic field in a magnetic resonance imaging system dedicated for skeletal age assessment of children. The target magnet was a 0.3-T open and compact permanent magnet tailored to the hand imaging of young children. The homogeneity of the magnetic field was first improved by shimming using pieces of permanent magnets. The residual local inhomogeneity was then compensated for by shimming using the SC shim coil. The effectiveness of the shimming was measured by imaging the left hands of human subjects and evaluating the image quality. The magnetic resonance images for the child subject clearly visualized anatomical structures of all bones necessary for skeletal age assessment, demonstrating the usefulness of combined shimming.
Elsevier Inc.
2013-05
eng
journal article
http://hdl.handle.net/2241/119360
https://tsukuba.repo.nii.ac.jp/records/29102
23475056
10.1016/j.jmr.2013.02.005
1090-7807
AA11113784
Journal of magnetic resonance
230
125
133
https://tsukuba.repo.nii.ac.jp/record/29102/files/JMR_230.pdf
application/pdf
1.2 MB
2013-12-25