Comparing anisotropic diffusion filters for the enhancement of sodium magnetic resonance images

• Verfasst von: Decker, Christoph M. [VerfasserIn]
• Verfasst von: Zöllner, Frank G. [VerfasserIn]
• Verfasst von: Konstandin, Simon [VerfasserIn]
• Verfasst von: Schad, Lothar R. [VerfasserIn]
• Titel: Comparing anisotropic diffusion filters for the enhancement of sodium magnetic resonance images
• Verf.angabe: Christoph M. Decker, Frank G. Zöllner, Simon Konstandin, Lothar R. Schad
• E-Jahr: 2012
• Jahr: 2 April 2012
• Umfang: 9 S.
• Teil: volume:30
• Teil: year:2012
• Teil: number:8
• Teil: pages:1192-1200
• Teil: extent:9
• Fussnoten: Gesehen am 25.09.2018
• Titel Quelle: Enthalten in: Magnetic resonance imaging
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1982
• Jahr Quelle: 2012
• Band/Heft Quelle: 30(2012), 8, Seite 1192-1200
• ISSN Quelle: 1873-5894
• DOI: doi:10.1016/j.mri.2012.04.019
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1581296398

Abstract

The anisotropic diffusion (AND) filter, an image processing technique derived from physics, was applied to low-resolution sodium magnetic resonance imaging (MRI) to examine the possibilities of image enhancement by postprocessing. We compared six different variants of AND filters. Besides the qualitative good results on phantom measurements, quantitative analyses on MRI of human kidney yielded major improvements in noise reduction and other quality measures: the noise (i.e., the standard deviation in the image background) could be reduced to 1%-2% of its original value, while linear filters (Gaussian, Fermi, Hamming) achieved a reduction to 42%-64%. Besides that, less than 5% of structures and intensities are lost when using AND filters. Comparing the different variants, the two-dimensional and the three-dimensional AND filter outperformed the histogram-of-gradient and tensor-based AND filter. We envision that by using these AND filters, quantitative analysis of sodium MRI of kidney could be improved.