Evaluation of the Magnetic Properties of Cosmetic Contact Lenses with a Superconducting Quantum Interference Device

Kagayaki KURODA; Naoki SHIRAKAWA; Yoshiyuki YOSHIDA; Kazuya TAWARA; Akihiro KOBAYASHI; Toshiharu NAKAI

doi:10.2463/mrms.2013-0059

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Evaluation of the Magnetic Properties of Cosmetic Contact Lenses with a Superconducting Quantum Interference Device

Kagayaki KURODA , Naoki SHIRAKAWA, Yoshiyuki YOSHIDA, Kazuya TAWARA, Akihiro KOBAYASHI, Toshiharu NAKAI

著者情報

キーワード: contact lens, displacement force, magnetization, MR safety, SQUID

ジャーナルフリー早期公開

論文ID: 2013-0059

DOI https://doi.org/10.2463/mrms.2013-0059

この記事には本公開記事があります。

The final version of this article is now available: Vol. 13 (2014), No. 3 pp. 207-214

詳細

抄録

We evaluated the magnetization of 21 cosmetic contact lens samples that included various coloring materials with a superconducting quantum interference device with regard to magnetic resonance (MR) safety. We found 7 samples were ferromagnetic; two had both ferromagnetic and diamagnetic properties; and the rest were diamagnetic. The saturated magnetization of the most ferromagnetic sample was 15.0 µJ/T, which yielded a magnetically induced displacement force of 90.0 µN when the spatial gradient of the static magnetic field was 6.0 T/m. The force was less than one-third of the gravitational force.

責任著者(Corresponding author)

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