Magnetic resonance image distortion correction with a reference volume

摘要

Distortion correction is provided in magnetic resonance imaging. Distortions in one volume are corrected using another volume. The isocenter of the other volume is nearer to an edge of the one volume than the isocenter of the one volume. Using data registration, the other volume is used to correct distortions in the one volume. The other volume may be acquired in little time relative to the acquisition of the one volume by having a smaller field of view, lower resolution, and/or smaller signal-to-noise ratio. The other volume may be a connecting volume for correcting distortions in two volumes to be composed together.

主权项

1. A method for distortion correction in magnetic resonance imaging, the method comprising:
acquiring first and second magnetic resonance volumes representing first and second different portions of a patient at a first resolution, the first and second magnetic resonance volumes having first and second field of views, and wherein the first and second different portions have an overlapping area; acquiring a third magnetic resonance volume representing a third portion of the patient and having a third field of view, the third magnetic resonance volume having an isocenter in the overlapping area, having a field of view smaller than the first and the second field of view, and acquired at a second resolution less than the first resolution; non-rigidly registering the third magnetic resonance volume with the first magnetic resonance volume; correcting distortion in the first magnetic resonance volume based on the registering between the first and third magnetic resonance volumes; non-rigidly registering the third magnetic resonance volume with the second magnetic resonance volume; correcting distortion in the second magnetic resonance volume based on the registering between the second and third magnetic resonance volumes; composing the distortion corrected first magnetic resonance volume with the distortion corrected second magnetic volume; and generating an image as a function of the composed first and second magnetic resonance volumes.