Sensitivity enhancement and reduction of Gibbs artifact in T2-weighted imaging using variable tip angle excitation.
Introduction of a Gaussian weighting function into the phase encoding of the spin-echo imaging method via variable tip angle excitation, with concomitant optimization of the recycle delay, is shown to increase the sensitivity of T2-weighted imaging by up to 40%. In addition, the Gibbs artifact associated with sharp boundaries is reduced considerably without the need for postprocessing of the data.
Webb
A G
AG
College of Veterinary Medicine, University of Illinois, Urbana-Champaign 61801.
Clarkson
R B
RB
D016477:Artifacts; D005069:Evaluation Studies as Topic; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement / Q000379:methods* / Q000592:standards; D007091:Image Processing, Computer-Assisted / Q000379:methods / Q000592:standards; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008961:Models, Structural; D016011:Normal Distribution