Just for the heck of it, I idly googled "13 radiology" just to see what popped up. Here are some of my hits:
The European Society of Musculoskeletal Radiology had its 10th Annual Meeting on Friday, June 13, 2003 in Aarhus, Denmark. A quick follow-up google search of "ESMR", "disaster" and "2003" didn't turn up any obvious catastrophes, so I'm assuming they survived somehow.
Vijay of Scan Man's Notes posted the following on Friday, April 13, 2008:
Happy Baisakhi to Punjabi friendsHopefully, Vijay will post an update next April so that we can see how the Punjab fared following this inauspicious juxtaposition of dates.
It is, I think, a rare coincidence that a major festival falls on what is traditionally thought to be an unlucky day.
Would this make the whole New Punjabi Year an unlucky one?
Chapter 13 of Emergency Radiology, edited by Reisdorff, Schwartz & Williamson turns out to be "Radiology of the Cervical Spine", surely one of the more terrifying body parts to image.
Most frightening of all, the chapter for "Radiology Services" in the U.S. Medicare Claims Processing Manual turns out to be Chapter 13. Coincidence or Satanic confluence? You be the judge...