A photograph of how this type of equipment looks can be found on pages 28..39 of this IAEA publication:<p><a href="http://www-pub.iaea.org/MTCD/publications/PDF/Pub1278_web.pdf" rel="nofollow">http://www-pub.iaea.org/MTCD/publications/PDF/Pub1278_web.pd...</a><p>Fig. 10 & 11 show the devices used for radiation treatment of (almost always) tumors.<p>Fig.12 is the (ancient, green) therapy device with an apparatus (white) to exchange the radioactive source coupled beneath.<p>Figs 14 & 15 is how the "heads" look like after being scrapped.<p>(Page 34, Fig 20 & 21 show another type of this kind of treatment devices.)<p>Story about a similar device being stolen (and unprofessionally dismantled) in 1987:<p><a href="http://en.wikipedia.org/wiki/Goi%C3%A2nia_accident" rel="nofollow">http://en.wikipedia.org/wiki/Goi%C3%A2nia_accident</a> (Wiki)<p><a href="http://www-pub.iaea.org/MTCD/publications/PDF/Pub815_web.pdf" rel="nofollow">http://www-pub.iaea.org/MTCD/publications/PDF/Pub815_web.pdf</a> (IAEA Report)
Update: the radioactive source has been found.
<a href="http://m.washingtonpost.com/world/the_americas/stolen-cobalt-60-found-abandoned/2013/12/04/7d3fe3f8-5d42-11e3-8d24-31c016b976b2_story.html" rel="nofollow">http://m.washingtonpost.com/world/the_americas/stolen-cobalt...</a>