Susceptibility artifact reduction in fat suppression.
Strong fat signal in regions where a large susceptibility difference exists, for instance at the interface between air and tissue near the maxillary sinus, may not be eliminated by currently available fat suppression techniques without sacrificing the overall quality of the images. In this article, we show that this fat signal, which appears as a susceptibility artifact, can be significantly reduced by using an optimized presaturation pulse with sharp edges and a broad bandwidth, while causing minimal disturbance of the water signal. Several optimized presaturation pulses can be reproduced by the Fourier coefficients provided in the Appendix.
Mao
J
J
Department of Radiology, University of Florida, Gainesville 32610, USA.
Gao
J H
JH
Yan
H
H
Ballinger
J R
JR
D000273:Adipose Tissue / Q000033:anatomy & histology*; D016477:Artifacts; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008443:Maxillary Sinus / Q000033:anatomy & histology*; D012815:Signal Processing, Computer-Assisted