You can upload images using the upload function on the site, comes up when you write any text. Other members have used radiant dicom to upload images on & then post a link, or use 3D slicer:
RadiANT DICOM Viewer tutorial - General - Living with Eagle
Making Your Own 3D Images from CT Scan- 3D Slicer Tutorial - Living with Eagle
Is that any help?
Just make sure you remove any personal details from your images if you upload them straight onto the site.