title: A multispectral three-dimensional acquisition technique for imaging near metal implants.
abstract: Metallic implants used in bone and joint arthroplasty induce severe spatial perturbations to the B0 magnetic field used for high-field clinical magnetic resonance. These perturbations distort slice-selection and frequency encoding processes applied in conventional two-dimensional MRI techniques and hinder the diagnosis of complications from arthroplasty. Here, a method is presented whereby multiple three-dimensional fast-spin-echo images are collected using discrete offsets in RF transmission and reception frequency. It is demonstrated that this multi acquisition variable-resonance image combination technique can be used to generate a composite image that is devoid of slice-plane distortion and possesses greatly reduced distortions in the readout direction, even in the immediate vicinity of metallic implants.
authors.affiliation: Applied Science Laboratory, GE Healthcare, Waukesha, Wisconsin 53188, USA. Kevin.Koch@ge.com
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Koch
authors.forename: John E
authors.initials: JE
authors.lastname: Lorbiecki
authors.forename: R Scott
authors.initials: RS
authors.lastname: Hinks
authors.forename: Kevin F
authors.initials: KF
authors.lastname: King
mesh_terms: D000465:Algorithms; D006621:Hip Joint / Q000033:anatomy & histology* / Q000601:surgery; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008670:Metals / Q000032:analysis*; D019047:Phantoms, Imaging; D019736:Prostheses and Implants; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D008670:Metals