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Nonlinear anisotropic filtering of MRI data

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4 Author(s)
Gerig, G. ; Commun. Technol. Lab., ETH-Zentrum, Zurich, Switzerland ; Kubler, O. ; Kikinis, R. ; Jolesz, F.A.

In contrast to acquisition-based noise reduction methods a postprocess based on anisotropic diffusion is proposed. Extensions of this technique support 3-D and multiecho magnetic resonance imaging (MRI), incorporating higher spatial and spectral dimensions. The procedure overcomes the major drawbacks of conventional filter methods, namely the blurring of object boundaries and the suppression of fine structural details. The simplicity of the filter algorithm permits an efficient implementation, even on small workstations. The efficient noise reduction and sharpening of object boundaries are demonstrated by applying this image processing technique to 2-D and 3-D spin echo and gradient echo MR data. The potential advantages for MRI, diagnosis, and computerized analysis are discussed in detail

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Medical Imaging, IEEE Transactions on  (Volume:11 ,  Issue: 2 )