angiogram vs photo

angiogram

noun
  • An X-ray image of the blood vessels gained after the injection of a radiopaque contrast medium. 

photo

noun
  • A digital picture of any kind. 

  • A photo finish. 

  • A photograph. 

verb
  • To take a photograph of. 

How often have the words angiogram and photo occurred in a corpus of books? (source: Google Ngram Viewer )