Partial fourier partially parallel imaging.
The techniques of partial Fourier (PF) and partially parallel imaging have been combined using a constrained reconstruction technique. The benefits compared with the individual techniques are reduced imaging time and/or an increase in signal-to-noise ratio. Low-resolution phase maps and coil sensitivities may be obtained using autocalibration or from a prescan followed by additional processing. Minor phase artifacts that are introduced by relying on conjugate symmetry can be reduced using a novel regularization scheme to vary the degree to which PF is used in the reconstruction. A nonrectilinear reconstruction algorithm is presented and the potential for motion artifact reduction is investigated using robust reconstruction.
Bydder
Mark
M
Department of Radiology, Magnetic Resonance Institute, UCSD Medical Center, San Diego, California 92103-8456, USA. markbydder@ucsd.edu
Robson
Matthew D
MD
D000465:Algorithms; D016477:Artifacts; D001931:Brain Mapping / Q000379:methods*; D002138:Calibration; D005583:Fourier Analysis; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D019047:Phantoms, Imaging