title: Quantitative analysis of magnetic resonance imaging susceptibility artifacts caused by neurosurgical biomaterials: comparison of 0.5, 1.5, and 3.0 Tesla magnetic fields.
abstract: Magnetic resonance (MR) imaging is an important diagnostic tool for neurosurgical diseases but susceptibility artifacts caused by biomaterial instrumentation frequently causes difficulty in visualizing postoperative changes. The susceptibility artifacts caused by neurosurgical biomaterials were compared quantitatively by 0.5, 1.5, and 3.0 Tesla MR imaging. MR imaging of uniform size and shape of pieces ceramic (zirconia), pure titanium, titanium alloy, and cobalt-based alloy was performed at 0.5, 1.5, and 3.0 Tesla. A linear region of interest was defined across the center of the biomaterial in the transverse direction, and the susceptibility artifact diameter was calculated. Susceptibility artifacts developed around all biomaterials at all magnetic field strengths. The artifact diameters caused by pure titanium, titanium alloy, and cobalt-based alloy increased in the order of 0.5, 1.5, to 3.0 Tesla magnetic fields. The artifact diameter of ceramic was not influenced by magnetic field strength, and was the smallest of all biomaterials at all magnetic field strengths. The artifacts caused by biomaterials except ceramic increase with the magnetic field strength. Ceramic instrumentation will minimize artifacts in all magnetic fields.
authors.affiliation: Department of Neurosurgery, Iwate Medical University School of Medicine, Morioka, Iwate, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Matsuura
authors.forename: Takashi
authors.initials: T
authors.lastname: Inoue
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Ogasawara
authors.forename: Makoto
authors.initials: M
authors.lastname: Sasaki
authors.forename: Hiromu
authors.initials: H
authors.lastname: Konno
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Kuzu
authors.forename: Hideaki
authors.initials: H
authors.lastname: Nishimoto
authors.forename: Akira
authors.initials: A
authors.lastname: Ogawa
mesh_terms: D016477:Artifacts; D001672:Biocompatible Materials / Q000032:analysis*; D002516:Ceramics / Q000032:analysis; D003035:Cobalt / Q000032:analysis; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods; D008280:Magnetics; D019736:Prostheses and Implants; D014025:Titanium / Q000032:analysis
chemical_list: D001672:Biocompatible Materials; D003035:Cobalt; D014025:Titanium