<p>Dear Dtistudio experts,<br> <br>I am a newbie user of this software who have encountered very confusing problems that I don't understand how to solve. Please see the description below. I keenly look forward to your help! Thank you very much for tutoring. <br>
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<p>Detailed data processing procedure:<br>1. Acquisition: Siemens Trio 3.0T with Mosaic format<br>Parameters: diffusion directions=20, slices=25, average=2, number of b-value is 6 plus b0.<br>2. Extract different b-value subfiles using matlab<br>
3. Raw data converted from DICOM to NIfTI using dcm2niigui.exe, resulting in four sets of files: **.img, **.hdr, **.bvec, **.bval.<br>3. Adjust **.bval file to the right format suitable for DTIstudio<br>4. Load **.img file to DTIstudio ŕ MRI View 3D, choose ‘image file format’ as ‘Analyze’, then automatic image registration (AIR), the data saved as **.dat<br>
5. Opening DTI mapping, select Philips REC format, add the **.dat file generated in Step 4. Copy the gradient table generated in Step 3<br>6. Calculate the tensor, color map, etc<br> <br>Question1: <br>Is my data processing procedure correct?<br>
<br>Question2: <br>Under AIR condition, after sensor calculation and checking ‘Anisotropy-FA’, I found that slice0 shows nothing, as if the information in slice0 is lost.The last slice shows apparently wrong FA because many pixels value FA=1. But the slices between these two slices seem to be normal. If I don’t do the AIR, slice0 information is not lost , and slice24 shows normal FA values.<br>
<br> <br>Sincerely,<br>Chunxiang </p>