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Summary: A METHOD FOR THE CHARACTERISATION OF SPATIAL STRUCTURES OBSERVED
IN CEREBRAL FMRI DATA
Camille Gómez-Laberge12
, Andy Adler1
, Matthew J. Hogan2
1
Systems & Computer Engineering, Carleton University
2
Neuroscience, Ottawa Health Research Institute
I. INTRODUCTION
Functional Magnetic Resonance Imaging (fMRI)
can detect venous concentration changes of
deoxygenated hemoglobin. Cerebral blood flow is
locally regulated by pre-capillary arteriolar smooth
muscles [1]. Consequently, fMRI images inherit the
spatial characteristic of localised signal change. In
addition, spurious voxels also exhibit significant
fluctuations due to instrumental and physiological
noise. The superposition of these effects emerge when
analysing the images for significant temporal changes.
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