The ability to digitally capture and share radiographs transformed the field. It removed the requirement that a radiologist must sit in the hospital, which meant, for example, that a radiologist could be sitting as far away as Australia reading cases during normal working hours processed in United States emergency rooms in the middle of the night.
There are a few key differences between radiology and pathology that make the equivalent jump more difficult.
One is that in radiology, you can jump straight from capturing an image to sharing a digitized version of that image, like using a digital camera instead of a film camera. In pathology, we still have to contend with the physical nature of the work: processing the tissue, producing a glass slide, staining the glass slide, and then, finally, digitizing it. There’s a complex workflow that must happen in the laboratory—producing a slide that must be completed regardless of whether the slide goes on to be digitized. As such, digitization actually adds to the complexity rather than reducing the number of steps prior to the pathologist’s review of the slides.
Another difference is in the images themselves. Pathology images are ten to 100 times larger than digitized radiology images, so manipulating, sending and storing them all pose significant technological challenges.