rendgen

1. X-ray
   Doktor me je poslao na rendgen pluća. — The doctor sent me for a chest X-ray.
   Rendgen je pokazao da ruka nije slomljena. — The X-ray showed that the arm wasn't broken.
2. X-ray machine
   Rendgen u domu zdravlja je opet u kvaru. — The X-ray machine at the health centre is broken again.

Common phrases are ići na rendgen, 'to go for an X-ray', and snimiti rendgen, 'to have an X-ray taken'.