The sample DICOM images are created according to the
the Supplement 145.
The Web viewer is powered by the
OpenLayers toolkit. The
whole-slide images can be exported as hierarchical
TIFF to other tools (such
as Cytomine) for further analysis
besides simple Web viewing.
Most sample images come from public datasets courtesy of
the OpenSlide project.
Some source images were encoded in the proprietary
Ventana BIF format, and were converted
using OpenSlide. Unfortunately, because
of this proprietary file format, OpenSlide is affected
by an issue
that misaligns the tiles. As a
consequence, the alignment problems you might observe in
the demo images are not a bug inside Orthanc, but a
direct consequence of the lack of interoperability in
the whole-slide imaging domain. Using DICOM Supplement
145 is clearly a solution to this general issue.