USMLE AID on Twitter: "Posterior dislocation of shoulder on XRay -Light bulb sign -Trough line sign -Rim sign http://t.co/YBR3AWL7rB #USMLE http://t.co/BOVvhHYpPx" / Twitter
Optics & Photonics News - Image of the Week
Rectal foreign body - light bulb | Radiology Case | Radiopaedia.org
Human skull with light bulb, X-ray Stock Photo - Alamy