Using 3dIntracranial to extract intensity ranges for GM and WM. Linux output differs from Mac output over the same dataset. The Linux output appears to match the histogram, while the Mac output is off the map. However, histograms of segmented brains appear to match between computer systems.
Can someone else verify/reproduce this problem and/or try to fix it, other suggestions are welcome.
Linux and Mac output below.
Carl
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Carl Helmick
Psychiatry Brain Imaging Laboratory
Dalhousie University
Halifax, NS B3H 4J1
chelmick@dal.ca
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########## LINUX OUTPUT ################
C01a:Program: 3dIntracranial
Author: B. D. Ward
Initial Release: 04 June 1999
Latest Revision: 02 December 2002
2087096 voxels above lower cutoff = 25
Estimating PDF of voxel intensities
Original PDF:
Number of bins = 570
Lower bound = 26.000000
Upper bound = 595.000000
Bin width = 1.000000
Trimmed PDF:
Number of bins = 179
Lower bound = 29.000000
Upper bound = 207.000000
Bin width = 1.000000
Smoothed PDF:
Number of bins = 179
Lower bound = 29.000000
Upper bound = 207.000000
Bin width = 1.000000
Extrema of PDF:
Num Local Min = 3
x[ 59] = 88.000 p[ 59] = 0.012632
x[169] = 198.000 p[169] = 0.000324
x[177] = 206.000 p[177] = 0.000284
Num Local Max = 3
x[ 41] = 70.000 p[ 41] = 0.017872
x[ 64] = 93.000 p[ 64] = 0.013535
x[171] = 200.000 p[171] = 0.000329
Initial PDF estimates:
Lower Bnd = 29.000 Upper Bnd = 207.000
Gray Peak = 70.000 White Peak = 93.000
Probability Density Function Estimates:
Background Coef = 0.871807
Background Mean = 38.449902
Background Std Dev = 67.025116
Gray Matter Coef = 0.391425
Gray Matter Mean = 71.522095
Gray Matter Std Dev = 11.828919
White Matter Coef = 0.125516
White Matter Mean = 95.679581
White Matter Std Dev = 6.467299
rmse = 0.000136
Control inputs:
anat filename = c01aNU_master+orig
min value = 47.864258
max value = 108.614182
min conn = 4
max conn = 2
prefix filename = c01aNU_cranialSeg
############# MAC G4 OUTPUT ################
C01a:
Program: 3dIntracranial
Author: B. D. Ward
Initial Release: 04 June 1999
Latest Revision: 02 December 2002
2091286 voxels above lower cutoff = 25
Estimating PDF of voxel intensities
Original PDF:
Number of bins = 582
Lower bound = 26.000000
Upper bound = 607.000000
Bin width = 1.000000
Trimmed PDF:
Number of bins = 188
Lower bound = 30.000000
Upper bound = 217.000000
Bin width = 1.000000
Smoothed PDF:
Number of bins = 188
Lower bound = 30.000000
Upper bound = 217.000000
Bin width = 1.000000
Extrema of PDF:
Num Local Min = 3
x[131] = 161.000 p[131] = 0.001192
x[181] = 211.000 p[181] = 0.000292
x[184] = 214.000 p[184] = 0.000261
Num Local Max = 3
x[ 44] = 74.000 p[ 44] = 0.017487
x[132] = 162.000 p[132] = 0.001193
x[182] = 212.000 p[182] = 0.000293
Initial PDF estimates:
Lower Bnd = 30.000 Upper Bnd = 217.000
Gray Peak = 74.000 White Peak = 162.000
Probability Density Function Estimates:
Background Coef = 0.693134
Background Mean = 72.574333
Background Std Dev = 28.198399
Gray Matter Coef = 0.270520
Gray Matter Mean = 82.160347
Gray Matter Std Dev = 14.884689
White Matter Coef = 0.086501
White Matter Mean = 160.568390
White Matter Std Dev = 26.669518
rmse = 0.000678
Control inputs:
anat filename = c01aNU_master+orig
min value = 52.390968
max value = 213.907425
min conn = 4
max conn = 2
prefix filename = c01aNU_cranialSeg
##################################
