MRI Studio Forum » DTI Studio

Fiber Tracking Stats

(4 posts)
  • Started 7 years ago by GRGlenn
  • Latest reply from JHMI_Hangyi
  1. GRGlenn
    Member

    Hey,

    When you calculate the statistics for Images along selected fibers, it seems like you have weighted the voxel values by the number of fibers that pass through the voxel. I have a few questions about this. (1) What are the reasons for fiber weighting? (2) Is there a way to see how many fibers go through each voxel so that I can integrate over certain regions of a tract and recalculate the mean and std without generating new tracts?

    Thanks,

    Russell Glenn

    Posted 7 years ago #
  2. JHMI_Hangyi
    Member

    the # of fibers for each pixel can be obtained by "fiber save" button -> "Fiber Density", in this way, you will get an image file, in which each pixel shows the # of fibers passing through.

    I don't know exactly what is the meaning of the 1st question, but fiber statistics are carried on along the fibers, not the voxels.

    Posted 7 years ago #
  3. GRGlenn
    Member

    Thank you very much. For the first question, I was just curious why calculate the statistics along the fibers instead of the voxels because when I was originally told to look at the average FA, RA, VR, etc. along certain tracts, I just took an average of the voxel intensity values, using the binary fiber files as a mask. It doesn't make a huge difference though in the data analysis... the trends are similar. The second question was somewhat trivial. I redid some of the calculations using the Fiber Density image and realized I could get the same answers from the information provided. Sorry about that! Thank you very much for this forum, and the software. They are very helpful.

    Do you have any advice for loading DICOM images. I have a number of DWIs that I can't load using any of the formats available, and I don't really know how to get around it.

    Posted 7 years ago #
  4. JHMI_Hangyi
    Member

    the reasons for unrecognized DICOM file could be:
    1. new format (DICOM standard allows manufactures to create their tags for their dataset);
    2. compressed DICOM data (Dtistudio cannot load them in);
    3. the DICOM fie has no image data (the manufactures may save imaging parameters as a DICOM file);

    Posted 7 years ago #

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