Eric Egolf

1

• Eric Egolf
• Functional Connectivity Toolbox
• Year Long Project
• Project Advisor Professor Armen

2
Progress Overview

• Brief Review of Functional Connectivity
• First Algorithm(Correlation)
• Test Data vs. Real Data
• Using Matlab/SPM
• What is Next

3
Functional Connectivity

• fMRI
• Functional Connectivity
• Different Metrics
• Project is Integration of Different Methods

4
Correlation

• Correlation Coefficient
• Voxels have T time points
• Correlation takes out time
• Element is Voxel vs Voxel
• Matrix Algebra vs Loops

5
Problems and Solutions

• Problems
• Size of Matrix
• (110592 voxels 110592 voxels)
• Interpreting Results
• Spatial Consistency(Flattening)
• Not Yet Using Processed Data
• Solutions
• Masking
• Window Size
• ROI

6
Test Data vs. Real Data

• Test Data
• X3 Y3 Z3
• Sin added to two time series

7
Using Matlab/SPM

• Skeleton GUI

• Previous Functions

8
What is Next

• Hold on Correlation
• Optimize later
• Compliments Other Methods
• Thresholding
• Independent Components Analysis(ICA)
• Very Useful Tool
• More difficult