Water-fat separation for fast spin echo imaging in an inhomogeneous field with progressive encoding
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United States of America Patent
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Nov 28, 2006
Grant Date -
Jun 9, 2005
app pub date -
Nov 5, 2004
filing date -
Nov 17, 2003
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Abstract
A method to separate two chemically-shifted components of water (w) and fat (f) signals by: (i) estimating the field inhomogeneity .beta. through a treatment of the residuals of the Moore-Penrose solution of the following equations: cos(.alpha..sub.n.beta.)*w+cos [.alpha..sub.n(1+.beta.)]*f=real (I.sub.n) and sin(.alpha..sub.n.beta.)*w+sin [.alpha..sub.n(1+.beta.)]*f=imaginary (I.sub.n), and (ii) using the estimated .beta. to determine the resulting solution for w and f from the original input signals I.sub.n.
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