Method of removing dynamic nonlinear phase errors from MRI data

Details Method of removing dynamic nonlinear phase errors from MRI data Method of removing dynamic nonlinear phase errors from MRI data

2005-02-08

2005-02-08

Arana, Louis (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

C324S307000

Reexamination Certificate

active

06853191

ABSTRACT:
Disclosed is a generalized reconstruction method that corrects for non-linear phase errors based on least-squares estimation. An approximation of the least squares estimate utilizes refocusing reconstruction in which high-resolution data is multiplied by the phase conjugate of a navigator in image-space. The multiplication rephases the unaliased signal in the high-resolution data. The high-resolution data can then be added together coherently. The multiplication can be effected in k-space as a convolution using a gridding reconstruction of the high-resolution data using the low resolution navigator.

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patent: 6321107 (2001-11-01), Derbyshire
Miller, Karen and Panly, John, “Nonlinear Navigated Motion Correction for Diffusion Imaging”, 10thScientific Meeting of ISMRM, Honolulu, 2002, 1 page.
Miller, Karen and Pauly, John, “Nonlinear Phase Correction for Diffusion Imaging” Magnetic Resonance in Medicine, vol. 50, pp. 343-353, 2003.

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