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Using a bidimensionalttest to compare simultaneous activations in functional brain MRI

Authors
Journal
Clinical Imaging
0899-7071
Publisher
Elsevier
Publication Date
Volume
26
Issue
2
Identifiers
DOI: 10.1016/s0899-7071(01)00378-3
Keywords
  • Fmri
  • Brain
  • Statistical Analysis

Abstract

Abstract The aim of functional brain magnetic resonance imaging studies is to determine which regions of the brain are related to a given specific task. Different methods can be used to extract the functional signal and there is currently no consensus for this operation. Measures based on correlation are only relevant for a single task. In this paper, we propose a method based on a multivariable Student's t test that permits the comparison of the results of successive activations. This technique allows a qualitative analysis of complex tasks, making possible to deal with both similar and different activated cortical areas.

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