Hi experts,
Hello experts,
I'm struggling with converting diffusion images from DICOM to NII format for data obtained from a Philips Intera MRI. The issue is that my bvec files are mostly zeros.
I get the following warnings:
Warning: Volume number does not vary (0019,10A2; 0020,0100;
2005,1063; 2005,1413), assuming meaningful instance number
(0020,0013).
Error: Check sorted order: 4D dataset has 34 volumes, but volume
index ranges from 33..3960
Warning: Isotropic DWI series, all bvecs are zero (issue 405)
Warning: Volume 1 appears to be derived image ADC/Isotropic
(non-zero b-value with zero vector length)
......
Warning: Saving 34 DTI gradients. Validate vectors (image slice orientation not reported, e.g. 2001,100B)
Any tips or guidance on this matter would be greatly appreciated.
Thanks in advance,
María José Torres
- I would ensure you are using the latest stable release of
dcm2niix v1.0.20230411 https://github.com/rordenlab/dcm2niix/re...
- You can find validation datasets for Philips DICOM images
here:
https://github.com/neurolabusc/dcm_qa_philips - The warnings suggest some slices may be missing. I would try to
export the DICOMs direct from your scanner before it has been
touched by any PACS or anonymization tool to see if they are
corrupting your data.
- I suggest you contact the Philips Clinical Scientist associated
with your scanner. They can help guide you.