title: Comparison of positioning methods of a ferromagnetic sphere for magnetic steering using 3 T MRI.
abstract: Magnetic steering of an untethered ferromagnetic device in a living body has many advantages in the clinical fields. In this paper, the positioning and tracking methods of a ferromagnetic sphere have been compared with magnetic resonance phantom images obtained with three different imaging sequences, spin echo, gradient echo, and selected positive contrast sequences. The position of the ferromagnetic sphere has been calculated from the MRI images which have susceptibility artifacts caused by the magnetic sphere. We have compared the positioning errors among the magnetic sphere images.
authors.affiliation: Department of Biomedical Engineering, Kyung Hee University, Yongin, Kyungki, Republic of Korea.
authors.forename: Byung H
authors.initials: BH
authors.lastname: Han
authors.forename: Lae H
authors.initials: LH
authors.lastname: Kang
authors.forename: Yong H
authors.initials: YH
authors.lastname: Ha
authors.forename: Min H
authors.initials: MH
authors.lastname: Cho
authors.forename: Soo Y
authors.initials: SY
authors.lastname: Lee
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003287:Contrast Media / Q000494:pharmacology; D004867:Equipment Design; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008280:Magnetics; D015233:Models, Statistical; D019047:Phantoms, Imaging
chemical_list: D003287:Contrast Media