Anisotropic 2-D and 3-D averaging of fMRI signals

Author

Solé, Andres Fco ; Ngan, Shing-Chung ; Sapiro, Guillermo ; Hu, Xiaoping ; López, Antonio

Author_Institution

Univ. Pompeu Fabra, Barcelona, Spain

Volume

20

Issue

2

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

86

Lastpage

93

Abstract

A novel method for denoising functional magnetic resonance imaging temporal signals is presented in this note. The method is based on progressively enhancing the temporal signal by means of adaptive anisotropic spatial averaging. This average is based on a new metric for comparing temporal signals corresponding to active fMRI regions. Examples are presented both for simulated and real two and three-dimensional data. The software implementing the proposed technique is publicly available for the research community.

Keywords

adaptive signal processing; biomedical MRI; image enhancement; medical image processing; noise; 3-D averaging; adaptive anisotropic spatial averaging; anisotropic 2-D averaging; fMRI signals; functional magnetic resonance imaging; medical diagnostic imaging; progressive enhancement; temporal signals; Anisotropic magnetoresistance; Blood; Brain modeling; Electroencephalography; Engineering profession; Humans; Magnetic resonance imaging; Noise reduction; Protocols; Spatial resolution; Algorithms; Anisotropy; Brain; Brain Mapping; Computer Simulation; Fourier Analysis; Humans; Imaging, Three-Dimensional; Magnetic Resonance Imaging;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.913175

Filename

913175