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error converting certain slices #156

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drspear opened this issue Jan 29, 2018 · 5 comments
Closed

error converting certain slices #156

drspear opened this issue Jan 29, 2018 · 5 comments

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@drspear
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drspear commented Jan 29, 2018

I'm not an expert but I needed to convert one MRI sequence on my windows 10 computer to Nifti , using the dcm2niix bundled with mRIcroGL or the standalone version (dcm2niix.exe) , the conversion in both cases yielded errors converting certain slices of my sequence , 23 out of 151 dicom images failed to convert , I get the "Error: Only loaded 0 of xxxxxxxxxx bytes for [dicom image name and location]
and as a result I get the warning :"Warning: Interslice distance varies in this volume (incompatible with NIfTI format)"
, any possible causes ?

@neurolabusc
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First of all, can you tell me what version of dcm2niix you are using - it is the first thing it reports when it runs. Please make sure you are running the latest release. The issues you are having sound like an incomplete/corrupted transfer of files from your scanner. Interslice distances rarely vary with MRI scans - due to slice interference changes this tends to change the contrast (though variability is common for CT scans). I would go back to the PACS/scanner and make sure you have a complete transfer. If the problem persists, could you privately send me one of the images that reports only 0 bytes were loaded?

@drspear
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drspear commented Jan 29, 2018

I'm using standalone module v1.0.20171215 (latest version)
and bundled module v1.0.20170624
they both produce the same error for the same image slices
my only source of the images is a medical CD given by the hospital where the procedure was done , I had no problem reading the images in the built in Dicom reader , I was also able to convert all images into nifti format using another software (Dicom 2 nifti 1 , but I got a separate .nii file for each dicom image , and I want the end file to be compiled like the way your software does it ) so I'm supposing it's not a corrupt file issue , i will send you a copy of some of the documents privately

@drspear
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drspear commented Jan 30, 2018

by the way how can I send you the images , I'm new to this site and I can't find any sort of messaging interface here

@neurolabusc
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Easiest is to send a dropbox link to my email (my last name @sc.edu).

@neurolabusc
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Fixed - replication of issue 157

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