Wikipedia 
Summary of history and modern day use of X-ray technology.
http://en.wikipedia.org/wiki/X-rayX-Ray Files
Pictures and corresponding diagnoses provided by the NetMedicine Radiology Library.
http://www.netmedicine.com/xray/xr.htm
Thoracic Imaging
The art and science of thoracic imaging. Recources, practice, education and other topics on Chest X-Ray.
http://www.chestx-ray.com/
X-Ray Diagnostic Database
Teaching case database. Rich cross-links allow for discussion of appearance or pathology, by reference to other cases and appearances.
http://myweb.lsbu.ac.uk/~dirt/museum/cmh1.html
Basic Chest X-Ray Review
Description and interpretation of this standardised diagnostic procedure.
http://rad.usuhs.mil/rad/chest_review/
SRS-X
Scottish Radiological Society Educational Resource, featuring X-Ray cases, tutorials, and interactive multiple choice papers.
http://www.radiology.co.uk/srs-x/
Musculoskeletal Radiology of Fractures
Overview of fractures in musculoskeletal radiology.
http://www.gentili.net/fracturemain.asp
