SOM for intensity inhomogeneity correction in MRI

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SOM for intensity inhomogeneity correction in MRI
Abstract. Given an appropriate imaging resolution, a common Magnetic Resonance Imaging (MRI) model assumes that object under study is composed of piecewise constant materials, so that MRI produces piecewise constant images. The intensity inhomogeneity (IIH) is modeled by a multiplicative inhomogeneity field. It is due to the spatial inhomogeneity in the excitatory Radio Frequency (RF) signal and other effects. It has been acknowledged as a greater source of error for automatic segmentation algorithms than additive noise. We propose a new non parametric IIH correction algorithm where the Self Organizing Map (SOM) is used to estimate the IIH field.
Maite García-Sebastián, Manuel Gra&n
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2007
Authors Maite García-Sebastián, Manuel Graña
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