TY - GEN
T1 - A study on the comparison of median filter regularization methods in diffusion tensor MRI
AU - Kim, Sunghee
AU - Kwon, Kiwoon
AU - Park, Insung
AU - Han, Bongsu
AU - Kim, Dongyoun
PY - 2007
Y1 - 2007
N2 - Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) is a method which makes it possible to study non-invasively the architecture of axonal fibers in the central nervous system. Since eigenvectors obtained from DT-MRI usually contain noise, the calculated vector directions may be deviated from the real fiber orientation. Therefore, noise errors can be accumulated as fiber tract becomes longer in tractography of DT-MRI. We used three algorithms for computing matrix medians which are the Simple Median Method, the Gradient Descent Method, and the Successive Fermat Method, because matrix-valued median filters show excellent capabilities for structure-preserving denoising. The results of the Successive Fermat Method give better than those of the Simple Median Method and is faster and the performance is similar to those of the Gradient Descent Method.
AB - Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) is a method which makes it possible to study non-invasively the architecture of axonal fibers in the central nervous system. Since eigenvectors obtained from DT-MRI usually contain noise, the calculated vector directions may be deviated from the real fiber orientation. Therefore, noise errors can be accumulated as fiber tract becomes longer in tractography of DT-MRI. We used three algorithms for computing matrix medians which are the Simple Median Method, the Gradient Descent Method, and the Successive Fermat Method, because matrix-valued median filters show excellent capabilities for structure-preserving denoising. The results of the Successive Fermat Method give better than those of the Simple Median Method and is faster and the performance is similar to those of the Gradient Descent Method.
UR - http://www.scopus.com/inward/record.url?scp=57649216930&partnerID=8YFLogxK
U2 - 10.1109/IEMBS.2007.4353074
DO - 10.1109/IEMBS.2007.4353074
M3 - Conference contribution
C2 - 18002740
AN - SCOPUS:57649216930
SN - 1424407885
SN - 9781424407880
T3 - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
SP - 3454
EP - 3457
BT - 29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07
T2 - 29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07
Y2 - 23 August 2007 through 26 August 2007
ER -