Method for reducing translational motion artifacts in MR imaging

Details Method for reducing translational motion artifacts in MR imaging Method for reducing translational motion artifacts in MR imaging

1998-06-02

2000-05-30

Lateef, Marvin M.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600414, 382278, A61B 5055

Patent

active

060700955

ABSTRACT:
A method is provided for correcting for effects of translational motion or movement of an object in MR imaging. In accordance with the method, an MR point source is joined to the object for translational movement in unison therewith, the point source being maintained in selectively spaced-apart relationship with the object. The method further comprises acquiring a set of k-space data representing images of the object and point source collectively, and deriving a function representing the square of the magnitude of the k-space data set. An inverse Fourier transform operation is applied to the derived function to generate a correlation function with a number of correlation components, a specified one of the correlation components comprising the cross-correlation of the object and the point source. All of the correlation components are then discarded, except for the specified correlation component, which provides an adjusted MR image representing the object from which effects of the translational motion have been substantially eliminated.

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