Nowadays, all the image capturing devices for medical purposes
use the same image format: DICOM. DICOM stands for Digital Imaging
and Communications in Medicine; and it is a very rich image format,
independent from the capturing device and the visualization platform.
Now DICOM is considered the worldwide standard for Industry and research.
The format is open, and the most of its information can be freely download.

Kradview is a GPLed viewer of images obtained for some different sources:
X-ray, NMR and DICOM-compatible imaging devices that runs on free operating
systems. Its aim is a easy to use DICOM viewer with instant rendering of
images, no matter the size and the zoom of the DICOM image. It covers the
"let's see the the X-ray image" need of the medical professional.