open-discussion
open-discussion > RE: DWIConvert
Jan 29, 2018 07:01 PM | Ryan H - UCLA
RE: DWIConvert
Unfortunately I don't have access to the DICOM data (it is old data
collected from a previous institution).
The float-type NIFTI looks fine when inspected visually. Using 'fslstats input -R' on one of the float-type DWI volumes of b = 1000, I get an intensity range of (0, 93305.70315).
I converted the raw_dwi.nii.gz to short using 'fslmaths input output -odt short' and fslinfo shows that the data-type is now INT16 (which I assume is the same as short). The intensity range changed to (-32650, 32122). I then converted the NIFTI to NRRD and back to NIFTI without doing any preprocessing and ran FSL eddy. I'm still getting strange movement estimation:
0 0
0.0005123407713 0.0005123407713
0.1587485656 0.1582605558
0.1130426769 0.06394702062
0.1097974095 0.1337300947
0.11404085 0.08107907265
0.3179253263 0.2206585268
0.4007477664 0.09403035524
0.1543348373 0.2570243276
0.1543348373 0
0.1543348373 0
0.1543348373 0
0.1543348373 0
0.1225902082 0.07993731502
0.2240278314 0.1871989644
0.1729541336 0.131174488
0.134783198 0.05127259891
0.1494564061 0.01923367243
0.1481162757 0.05901859775
0.12086009 0.05416809264
0.1289983919 0.08436664884
0.07256662594 0.08781279937
0.1652316784 0.1233758291
0.1835429475 0.2549493272
0.1891260267 0.02074442581
0.23023032 0.06132250048
0.1969288796 0.09180264617
0.154194244 0.1013813746
0.2781723719 0.1835796615
0.3017552357 0.06266238067
0.234440393 0.1011516561
0.2462515138 0.05882053334
0.2478950007 0.0187058368
The float-type NIFTI looks fine when inspected visually. Using 'fslstats input -R' on one of the float-type DWI volumes of b = 1000, I get an intensity range of (0, 93305.70315).
I converted the raw_dwi.nii.gz to short using 'fslmaths input output -odt short' and fslinfo shows that the data-type is now INT16 (which I assume is the same as short). The intensity range changed to (-32650, 32122). I then converted the NIFTI to NRRD and back to NIFTI without doing any preprocessing and ran FSL eddy. I'm still getting strange movement estimation:
0 0
0.0005123407713 0.0005123407713
0.1587485656 0.1582605558
0.1130426769 0.06394702062
0.1097974095 0.1337300947
0.11404085 0.08107907265
0.3179253263 0.2206585268
0.4007477664 0.09403035524
0.1543348373 0.2570243276
0.1543348373 0
0.1543348373 0
0.1543348373 0
0.1543348373 0
0.1225902082 0.07993731502
0.2240278314 0.1871989644
0.1729541336 0.131174488
0.134783198 0.05127259891
0.1494564061 0.01923367243
0.1481162757 0.05901859775
0.12086009 0.05416809264
0.1289983919 0.08436664884
0.07256662594 0.08781279937
0.1652316784 0.1233758291
0.1835429475 0.2549493272
0.1891260267 0.02074442581
0.23023032 0.06132250048
0.1969288796 0.09180264617
0.154194244 0.1013813746
0.2781723719 0.1835796615
0.3017552357 0.06266238067
0.234440393 0.1011516561
0.2462515138 0.05882053334
0.2478950007 0.0187058368
Threaded View
Title | Author | Date |
---|---|---|
Jacek M | Apr 8, 2016 | |
Micah Johnson | Mar 22, 2018 | |
Daniel Berge | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Daniel Berge | Mar 22, 2018 | |
Martin Styner | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Daniel Berge | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Daniel Berge | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Micah Johnson | Mar 22, 2018 | |
Ryan H | Jan 23, 2018 | |
Martin Styner | Jan 26, 2018 | |
Ryan H | Jan 26, 2018 | |
Martin Styner | Jan 26, 2018 | |
Ryan H | Jan 26, 2018 | |
Martin Styner | Jan 26, 2018 | |
Ryan H | Jan 26, 2018 | |
Martin Styner | Jan 29, 2018 | |
Ryan H | Jan 29, 2018 | |
Martin Styner | Jan 30, 2018 | |
Ryan H | Jan 30, 2018 | |
Martin Styner | Jan 31, 2018 | |
Ryan H | Feb 2, 2018 | |
Martin Styner | Feb 19, 2018 | |
Ryan H | Feb 19, 2018 | |
Martin Styner | Feb 21, 2018 | |
Ryan H | Jan 31, 2018 | |
Maike Kleemeyer | Jan 10, 2018 | |
Martin Styner | Jan 10, 2018 | |
Maike Kleemeyer | Jan 11, 2018 | |
Martin Styner | Jan 11, 2018 | |
Maike Kleemeyer | Jan 15, 2018 | |
Martin Styner | Jan 17, 2018 | |
Maike Kleemeyer | Jan 18, 2018 | |
Martin Styner | Jan 18, 2018 | |
Marie Drottar | Jun 7, 2016 | |
Jacek M | Apr 27, 2016 | |
Martin Styner | Apr 27, 2016 | |
Jacek M | Apr 15, 2016 | |
Martin Styner | Apr 15, 2016 | |
Micah Johnson | Mar 27, 2018 | |
Daniel Berge | Apr 2, 2018 | |
Micah Johnson | Apr 2, 2018 | |
Juan Prieto | Apr 8, 2016 | |
Jacek M | Apr 13, 2016 | |
Martin Styner | Apr 13, 2016 | |
Jacek M | Apr 13, 2016 | |
Martin Styner | Apr 8, 2016 | |