After investigation, it appears that your file âsent_to_orthanc_dark_01.dcmâ has a preset windowing of âWW/WCâ (window width/center) that is incorrectly set to â76800 / 32512â.
This absolutely doesnât reflect the dynamic range of your image, which leads to dark images in the Stone Web viewer. You should report this issue to your support contact from Toshiba, as there is visibly an incorrect setting on your modality.
Nonetheless, I have just added a new feature in the Stone Web viewer to stretch the windowing to the dynamic range of the image, as depicted in the attached screenshot. This feature can serve as a workaround to your issue.