The Collaborative International Dictionary of English v.0.48:

Arthrography \Ar*throg"ra*phy\, n. [Gr. 'a`rqron joint +
   -graphy.]
   The description of joints.
   [1913 Webster]

WordNet (r) 3.0 (2006):

arthrography
    n 1: roentgenographic examination of a joint after injection of
         radiopaque contrast medium; produces an arthrogram