#557 Implicit VR DICOM image compressed to J2K with gdcmconv not rendering in Horos

[Antonio Diaz Tula]

Hello!

I used gdcmconv to compress a DICOM image to JPEG 2000 Lossless only.

If the transfer syntax of the original DICOM file is "Explicit VR little endian" then the compressed DICOM opens fine in the Horos viewer. Nonetheless, if the original DICOM is "Implicit VR little endian", then the compressed image opens incorrectly in Horos: it shows a grayscale square instead of the image, although the DICOM tags shows correctly in Horos (patient data, study date and time and so on).

We tested with other viewers (Radiant, Weasis, cornerstone.js) and this only happens in Horos.

Has anyone had this issue as well? Any idea what is going on here?

Thanks

[Mihail Isakov]

During conversion from implicit TS, GDCM sets VR of many (most) attributes VR::UN (unknown). I just tried converting from implicit TS and I can confirm this. Most likely, Horos was unable to cope with this at some point.

CP-246

[Antonio Diaz Tula]

Hello @issakomi thanks for confirming this.

I tried again with the "-U" option (described as "Use dict for VR (only public by default)") and now it opens correctly in all viewers including Horos.

Cheers