Noise and artifact comparison for Fourier and polynomial phase correction used with Fourier reconstruction of asymmetric data sets.
Two processes of phase correction, Fourier phase mapping and second-order polynomial phase fitting, are compared in combination with four different schemes for Fourier reconstruction of asymmetric data, using one-dimensional simulations and two-dimensional human head data. Polynomial phase correction provides systematically less image noise and is much less affected by localized phase differences caused by object edges and motion.
Hua
J
J
Department of Radiology, Metro-Health Medical Center, Cleveland, OH 44109.
Hurst
G C
GC
D016477:Artifacts; D005583:Fourier Analysis; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods