Comput Methods Programs Biomed - Wavelet-based de-noising techniques in MRI.

Tópicos

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Resumo

The paper deals with techniques for the enhancement of magnetic resonance (MR) images using the wavelet analysis, which is assessed from the viewpoint of choosing the mother wavelet and the thresholding technique. Three parameters are used as objective criteria of the quality of image enhancement: the signal-to-noise ratio (SNR), image contrast, and linear approximation of edge steepness. Unlike most of the standard methods, which work exclusively with image magnitude, we also examined the influence of image phase, i.e. the image is processed as a complex signal. In addition to the interpretation of results, a short summary is given that deals with the choice of the optimal mother wavelet and thresholding technique for different types of MR images.

Resumo Limpo

paper deal techniqu enhanc magnet reson mr imag use wavelet analysi assess viewpoint choos mother wavelet threshold techniqu three paramet use object criteria qualiti imag enhanc signaltonois ratio snr imag contrast linear approxim edg steep unlik standard method work exclus imag magnitud also examin influenc imag phase ie imag process complex signal addit interpret result short summari given deal choic optim mother wavelet threshold techniqu differ type mr imag

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