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Abstract #3739

Optimal Phase Sensitive Combination of Multi-Channel, Multi-Echo Images

L. Martyn Klassen1, Ravi S. Menon1

1Robarts Research Institute, The University of Western Ontario, London, ON, Canada

Increased use of multichannel coils and phase sensitive analysis requires coil combination techniques beyond the traditional square root of sum of squares. For multiple echo acquisitions used in B0 and quantitative susceptibility mapping, pixel wise singular value decomposition can be used to generate phase sensitive optimum, in a least squares sense, coil sensitivity and image magnetization estimates.

Keywords

achieve acquisition acquisitions alignment allows applications arbitrary assigned assumed assuming assumption available become becoming best bipolar body bottom channel channels coil coils column combination combine combining computed constant contained contains corrections correlated covariance cylindrical decomposition decreasing defined definition desired diagonal discards echoes eigenvector eigenvectors eight element equal equivalent estimating facto familiar field flash frequently generally generated gives global growing human important include increasing increasingly independent inherently institute interpolated isotropic issue largest least length literature location magnetization magnitude making manner many mapping maps matrix measured moved noise offset often optimal optimally particular positive processing proposed quantitative rank real receiver receivers reconstructed reconstructing referencing requirement resolution root scaled scaling sense sensitive sensitivities sensitivity sets simple simultaneously since singular sixteen space spawned square squares stochastic susceptibility symmetric system theory towards transformed typically ubiquitous ultra uncorrelated unequal uniform unit unsuitable utilize vector western zero