Henrik Hansson1, Jimmy Ltt, 12,
Freddy Sthlberg1,3, Markus Nilsson1
1Department of Medical Radiation
Physics, Lund University, Lund, Sweden; 2Center for Medical
Imaging and Physiology, Lund University Hospital, Lund, Sweden; 3Department
of Diagnostic Radiology, Lund University, Lund, Sweden
Eddy
currents distort diffusion-weighted images, which give rise to artefacts in
the estimated apparent diffusion coefficient and the diffusion kurtosis.
Current correction methods are not effective for b-values greater than 1000
s/mm2. We have developed a correction algorithm based on comparison of all
images in an image set, instead of separate volumes. This allows model based
distortion correction by maximizing the local correlation of the entire image
set.
Keywords