Bio-applicable Ti-based composites with reduced image distortion under high magnetic field

Sung Chul Kim, Yu Chan Kim, Hyun Kwang Seok, Seok Jo Yang, In Jin Shon, Kang Sik Lee, Jae Chul Lee

Research output: Contribution to journalArticle

Abstract

When viewed using a magnetic resonance imaging (MRI) system, invasive materials inside the human body, in many cases, severely distort the MR image of human tissues. The degree of the MR image distortion increases in proportion not only to the difference in the susceptibility between the invasive material and the human tissue, but also to the intensity of the magnetic field induced by the MRI system. In this study, by blending paramagnetic Ti particles with diamagnetic graphite, we synthesized Ti 100-xC x composites that can reduce the artifact in the MR image under the high-strength magnetic field. Of the developed composites, Ti 70C 30 showed the magnetic susceptibility of χ = 67.6 × 10 -6, which corresponds to 30% of those of commercially available Ti alloys, the lowest reported in the literature. The level of the MR image distortion in the vicinity of the Ti 70C 30 composite insert was nearly negligible even under the high magnetic field of 4.7 T. In this paper, we reported on a methodology of designing new structural materials for bio-applications, their synthesis, experimental confirmation and measurement of MR images.

Original languageEnglish
Pages (from-to)401-406
Number of pages6
JournalJournal of Korean Institute of Metals and Materials
Volume50
Issue number5
DOIs
Publication statusPublished - 2012 May

Keywords

  • Biomaterials
  • MR image artifact
  • Magnetic properties
  • Powder processing
  • SEM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys

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