Enhancing Functional Neuroimages: Wavelet Denoising as an Alternative to Gaussian Smoothing

Alle Meije Wink; Jos B.T.M. Roerdink

Enhancing Functional Neuroimages: Wavelet Denoising as an Alternative to Gaussian Smoothing

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Abstract

We present a general wavelet-based denoising scheme for functional neuroimages and compare it to Gaussian smoothing, the standard method in functional neuroimaging. We adapted WaveLab thresholding routines to 2D data, and tested their effect on the signal-to-noise ratio of noisy images. In a simulated time series test, we also investigated the shapes of detected activations after denoising.

Original language	English
Title of host publication	EPRINTS-BOOK-TITLE
Publisher	University of Groningen, Johann Bernoulli Institute for Mathematics and Computer Science
Number of pages	6
Publication status	Published - 2002

Keywords

signal-to-noise ratio
denoising
functional neuroimaging
wavelets

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abstract = "We present a general wavelet-based denoising scheme for functional neuroimages and compare it to Gaussian smoothing, the standard method in functional neuroimaging. We adapted WaveLab thresholding routines to 2D data, and tested their effect on the signal-to-noise ratio of noisy images. In a simulated time series test, we also investigated the shapes of detected activations after denoising.",

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AB - We present a general wavelet-based denoising scheme for functional neuroimages and compare it to Gaussian smoothing, the standard method in functional neuroimaging. We adapted WaveLab thresholding routines to 2D data, and tested their effect on the signal-to-noise ratio of noisy images. In a simulated time series test, we also investigated the shapes of detected activations after denoising.

KW - signal-to-noise ratio

KW - denoising

KW - functional neuroimaging

KW - wavelets

M3 - Chapter

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PB - University of Groningen, Johann Bernoulli Institute for Mathematics and Computer Science

ER -

Enhancing Functional Neuroimages: Wavelet Denoising as an Alternative to Gaussian Smoothing

Abstract

Keywords

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