SUVbw value are different for DRO Washington Image than required per QIBA profile

[namanhshah]

Describe the bug
When I tried getting the SUVbw values for University of Washington Imaging Research Laboratory Digital Reference Object available at https://depts.washington.edu/petctdro/downloads/DRO_20130529.zip, values are not as per required behavior described in QIBA profile for PET-CT (Page 68 of https://qibawiki.rsna.org/images/1/1f/QIBA_FDG-PET_Profile_v113.pdf). I have assessed the values in RadiANT as well as OHIF viewer for the reference which meets the requirement described in QIBA profile.

Expected behavior
SUVbw values should meet DRO values required per QIBA profile.

Additional context
Can you help me understand the issue here as I have some old work done on the Weasis and need to correct those works.

Screenshots
Attached screenshot with Weasis, OHIF and RadiANT viewer
Weasis 4.0.3 Screenshot:

RadiANT Viewer (SUVbw):

RadiANT Viewer (in BQML):

OHIF Viewer:

[nroduit]

Thanks for reporting this issue.

The problem is not in the calculation of the SUV factor but in the value of the input pixels. If I apply the Modality LUT values then I get the same results as Radiant or OHIF.

I asked the question on the DICOM forum because it seems not compatible with the BIR profile.