Title :
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
fDate :
2/1/2001 12:00:00 AM
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;
Journal_Title :
Medical Imaging, IEEE Transactions on
