title: Gradient field switching as a source for artifacts in MR imaging of metallic stents.
abstract: Metallic implants, such as stents, have long been a concern in magnetic resonance imaging (MRI). In addition to safety issues, they are commonly associated with image artifacts. The mechanisms of radiofrequency- (RF) and susceptibility-induced artifacts have been thoroughly investigated. However, gradient-switching-induced artifacts have not been analyzed. In this study it was demonstrated that gradient switching may be a source of artifacts in metallic stent MR imaging. These artifacts differ from those caused by the RF pulse. A theoretical explanation is provided as well.
authors.affiliation: Department of Biomedical Engineering, Technion, Israel Institute of Technology, Haifa.
authors.forename: Avshalom
authors.initials: A
authors.lastname: Shenhav
authors.forename: Haim
authors.initials: H
authors.lastname: Azhari
mesh_terms: D000497:Alloys; D016477:Artifacts; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015607:Stents
chemical_list: D000497:Alloys