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Activity Number: 375
Type: Contributed
Date/Time: Tuesday, August 11, 2015 : 10:30 AM to 12:20 PM
Sponsor: Section on Statistics in Imaging
Abstract #316901
Title: Global Intensity Normalization Induces Correlation in fMRI
Author(s): Kevin Liu* and Daniel Rowe
Companies: Marquette University and Marquette University
Keywords: fMRI ; global intensity normalization
Abstract:

Subject brains vary in both size and physical features. In functional magnetic resonance imaging (fmri), the most intuitive approach to correcting discrepancies between scans are processing with spatial and temporal filtering, whether it be a high or low filter, depending upon your intentions. A less obvious approach is global intensity normalization. As mentioned before, due to the uniqueness of each individual, the mean intensity of an entire data set will vary across individuals and scans. The goal is to retain a constant signal mean across each independent scan. Although this processing induces a correlation of no biological origin, leading to inaccurate interpretations of the data.

Authors who are presenting talks have a * after their name.

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