Elimination of magnetic field foldover artifacts in MR images.
Foldover artifacts arise when the same imaging frequency occurs both at a desired location within a slice and at another location within the sensitive region of the radiofrequency (RF) coil. Foldover artifacts can be caused by nonlinearity in the gradient system and by inhomogeneity in B(0). This study investigates an approach in which an extra RF receiver coil and a postprocessing method are used to identify and remove foldover artifacts.
Larkman
D J
DJ
The Robert Steiner Magnetic Resonance Imaging Unit, Imperial College School of Medicine, Hammersmith Hospital, London W12 0HS, United Kingdom.
Herlihy
A H
AH
Coutts
G A
GA
Hajnal
J V
JV
D016477:Artifacts; D004574:Electromagnetic Fields; D006225:Hand / Q000033:anatomy & histology; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging; D008962:Models, Theoretical; D012680:Sensitivity and Specificity