ADC Calculations Joshua Kim. I. Objective and Goals II. Current ADC Results III. Current Progress on...
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ADC Calculations ADC Calculations Joshua Kim
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Transcript of ADC Calculations Joshua Kim. I. Objective and Goals II. Current ADC Results III. Current Progress on...
ADC CalculationsADC Calculations
Joshua Kim
I. Objective and GoalsII. Current ADC ResultsIII. Current Progress on MatLab Program
Outline
Objective and Goals
Objective› To calculate ADC values for all patients
Goals› To study the pixel intensity variations with translation.› To calculate the combined effects of image statistical error
with contour placement uncertainty.› To create a MatLab GUI program that can make the ADC
analysis faster.
Current ADC Results (Meyers)ADC Graph
0
0.5
1
1.5
2
2.5
0 520 850
b-value (s/mm^2)
-ln
(Ii/
Io)
Scan 1
Scan 2
Scan 3
Scan 4
b = 0
b = 520
b = 850
MatLab Program
Problem:› Some lesions are very
difficult to contour
› Would like to study lesion pixel variation with translation.
› Also: Want good organization of data and fast analysis
MatLab:› User defined contours for b=0, 520 and 850.› Record coordinates (indices) of contour› Shift in 8 different directions by N pixels› Create ADC value plots as function of shift to study the pixel
variations› Conclude effect of transcription uncertainty
MatLab Program
b = 0 b = 520 b = 850
Future Work
Complete transcription error component of MatLab
Write code for organizing data
Complete ADC calculations for all patients
