The Collaborative International Dictionary of English v.0.48:

Phlebogram \Phleb"o*gram\, n. [Gr. fle`ps, flebo`s + -gram.]
   (Physiol.)
   A tracing (with the sphygmograph) of the movements of a vein,
   or of the venous pulse.
   [1913 Webster] Phlebolite

WordNet (r) 3.0 (2006):

phlebogram
    n 1: an X ray of a vein injected with a radiopaque contrast
         medium [syn: venogram, phlebogram]