Hello,
I hope all your collegues are safe after the attck in London. I have been
running dtifit and get strange results with the eigenvectors, V1, V2, and
V3. When first opening with fslview, the images appear speckled, black and
white and gray. Changing to lines view, there is a very tight maze, all red.
I am sure there is a problem with the data but I don't know how to debug it.
I have attached bvectors and vals below.
Thank you very much,
Thomas L. Arnow
Research Imaging Center,
San Antonio, TX, USA
dtifit -k datafixed.nii.gz -m nodif_brain_mask.nii -o dtiout -r bvecs87 -b
bvals -V
cat bvals
0 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700
700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700
700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700
700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700 700
700 700 700 700 700 700 700 700 700 700 700
bvecs =
Columns 1 through 11
1.0000 0.0948 0.7748 -0.6567 0.0591 -0.5812 0.9225
-0.7120 0.0245 -0.7993 -0.5334
0 0.5942 0.5537 0.7406 -0.1337 -0.8095 -0.0068
0.2392 -0.9348 -0.5331 0.6561
0 0.7987 -0.3051 0.1424 0.9893 -0.0837 0.3861
-0.6601 0.3544 -0.2773 0.5339
Columns 12 through 22
0.0422 -0.9827 -0.8213 -0.2360 -0.8696 0.1484 -0.7540
-0.7640 0.4489 -0.8491 -0.5558
0.9747 0.1488 0.4311 -0.7813 0.4927 0.8254 0.5209
-0.3935 -0.2976 -0.1208 0.7977
0.2196 0.1099 0.3735 0.5779 -0.0339 -0.5447 -0.4003
0.5114 -0.8425 -0.5142 -0.2340
Columns 23 through 33
0.9310 -0.6273 -0.5690 0.6028 0.4068 0.7136 -0.8647
0.3949 0.8238 0.7254 0.1904
-0.3600 0.3016 -0.0902 0.6302 0.0489 0.1989 0.0547
-0.8591 -0.3701 0.6812 -0.7265
0.0594 0.7180 -0.8174 0.4893 0.9122 0.6717 0.4994
0.3256 0.4293 0.0990 0.6603
Columns 34 through 44
0.1406 0.7376 0.2669 0.9122 -0.0581 -0.1177 0.3369
-0.5724 -0.8190 0.4143 0.8559
0.9734 -0.0636 0.8070 0.1611 -0.5200 -0.7526 -0.3791
-0.7360 -0.5619 0.8937 0.3741
-0.1808 -0.6722 0.5268 -0.3767 0.8522 -0.6479 0.8619
0.3615 0.1162 0.1719 0.3571
Columns 45 through 55
-0.4734 -0.2255 0.5507 -0.2342 0.0906 -0.9669 0.4362
0.0031 -0.4703 -0.2298 -0.1422
-0.7403 -0.0918 -0.5873 0.9671 -0.9957 -0.2067 0.4357
0.2679 0.6011 -0.9398 0.8108
-0.4773 -0.9699 0.5931 -0.0990 -0.0169 -0.1494 0.7873
-0.9634 -0.6461 -0.2528 0.5677
Columns 56 through 66
-0.3176 -0.6578 0.4606 -0.9483 0.2831 -0.2875 -0.6353
0.9324 -0.2256 0.7089 0.9118
0.1456 -0.4315 -0.8855 -0.2177 -0.6437 0.5087 -0.1044
0.3611 0.8538 -0.6777 -0.2359
0.9370 -0.6173 -0.0608 0.2309 -0.7109 0.8115 0.7652
-0.0146 -0.4691 0.1951 -0.3360
Columns 67 through 77
0.4944 0.6619 -0.3469 0.4499 0.6812 0.7712 -0.9397
0.1616 -0.3074 0.6794 -0.1009
-0.7614 -0.1877 0.9018 0.1398 0.3405 -0.6051 0.1800
-0.0826 -0.2320 -0.4542 0.6108
-0.4193 0.7257 0.2576 -0.8821 -0.6481 -0.1977 -0.2908
-0.9834 0.9229 -0.5762 -0.7853
Columns 78 through 87
0.0623 -0.4712 0.1382 0.4917 0.0290 -0.3792 -0.3054
0.4975 -0.3413 0.2851
0.2546 -0.5162 -0.9066 0.6707 -0.4376 0.2878 -0.9397
0.8418 -0.4640 0.4949
0.9650 0.7152 -0.3987 -0.5554 -0.8987 -0.8794 0.1540
-0.2096 -0.8175 -0.8208
>>
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