Lesley N. Baldwin1, K Wachowicz2,
B Gino Fallone, 12
1Department of Physics, University of
Alberta, Edmonton, Alberta, Canada; 2Department of Oncology,
University of Alberta, Edmonton, Alberta, Canada
MR
images are known to suffer from geometric distortion from a variety of
sources. Boundaries between fat- and
water-based tissues lead to discontinuities in the distortion field and
result in hyper- and hypo-intense regions which cannot be corrected using
standard distortion correction procedures.
We propose a number of pre-processing steps which separate the image
into fat and water components and shift the fat portion of the image prior to
distortion correction. The technique
was successfully demonstrated on phantom images and work is underway to
evolve and apply the technique to more complex in-vivo images.