Gradient field switching as a source for artifacts in MR imaging of metallic stents.
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.
Shenhav
Avshalom
A
Department of Biomedical Engineering, Technion, Israel Institute of Technology, Haifa.
Azhari
Haim
H
D000497:Alloys; D016477:Artifacts; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015607:Stents
D000497:Alloys