Title :
Comparison of positioning methods of a ferromagnetic sphere for magnetic steering using 3 T MRI
Author :
Han, Byung H. ; Kang, Lae H. ; Ha, Yong H. ; Cho, Min H. ; Lee, Soo Y.
Author_Institution :
Department of Biomedical Engineering, Kyung Hee University, Yongin, Kyungki, Republic of Korea
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.
Keywords :
Image analysis; Imaging phantoms; Magnetic cores; Magnetic devices; Magnetic materials; Magnetic resonance imaging; Magnetic susceptibility; Minimally invasive surgery; Pattern analysis; Propulsion; Algorithms; Artifacts; Contrast Media; Equipment Design; Humans; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Magnetic Resonance Imaging; Magnetics; Models, Statistical; Phantoms, Imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4244-1814-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2008.4649892
