medical imaging
TRANSCRIPT
7Signal Averaging Method (BOLD- fMRI Signal Data)
Outline
Introduction- fMRI
BOLD fMRI
Signal Averaging
Advantages of Signal Averaging
Objective
Method
Method (cont’d)
Flow Chart Diagram
BOLD fMRIData
Time Correlation
In commonFrequency Correlation
SIGNAL AVERAGING
New Hemodynamic Response
Time Correlation with High Threshold
Final MAP
Imaging Parameters
Data Analysis
Results
Frequency Correlation
Time and Frequency Correlation
FTAP Hemodynamic Response Vs. Reference
Final Activation Map; Threshold = 0.6
Activation observed on the sides of the brain
BH Hemodynamic Response bh002
Final Map, Threshold = 0.4
Activation observed on the sides and through the Mid line
DSST1 Hemodynamic Response bh002
Final Map, Threshold = 0.5
Activation only in SLICE # 20 in the back of the brain
DSST2 Hemodynamic Response
Final Map, Threshold = 0.4
DSST3 Hemodynamic Response
0 50 100 150-0.01
-0.005
0
0.005
0.01
0.015DSST3, Hemodynamic Response-bh002
Final Map, Threshold = 0.5DSST3 Final Map, Threshold=0.5
FTAP: bh002 Vs. bh101OLD bh 101YOUNG bh 002
BH: bh002 Vs. bh101Hemodynamic Response for bh101 at Threshold= 0.6:
Hemodynamic Response for bh002 at Threshold= 0.4:
DSST3: bh002 Vs. bh118Hemodynamic Response for bh118 at Threshold= 0.6:
Hemodynamic Response for bh002 at Threshold= 0.5:
0 50 100 150-0.01
-0.005
0
0.005
0.01
0.015DSST3, Hemodynamic Response-bh002
0 50 100 150-0.015
-0.01
-0.005
0
0.005
0.01
0.015
0.02DSST3, Hemodynamic Response-bh118
Conclusion
References