According to the nrmp data there were 11 DOs, 18 FMGs and the rest were probably US grads. Don't have the link ATM but it was the overall 2011 match data.
Your numbers (which are still incorrect, should be 11 DOs, 1 IMG and 6 FMG) are for PGY1 Radiology spots only (programs with combined internship); but as you know, for Radiology, you have to include PGY2 spots as well...
To help you out, here is the Link (Go to Pg. 13):
www.nrmp.org/data/resultsanddata2011.pdf
Also I forgot to add non-senior US MDs (prior graduates of US MD schools who were going through the match in 2011; since the other categories include such people, it is only fair to include them in the US MD data as well and actually slightly improves their numbers):
US MD: 946/18354 = 5.2%
DO: 62/1774 = 3.5%
US IMG (US Citizens attending foreign schools, e.g. Carib students): 36/2001 = 1.8%
Non-US IMG (FMGs): 37/2857 = 1.3%
LMAO. I'm at a 4th year at a top 25 MD school on full scholarship so that's pretty funny. I interviewed at only top 20 radiology programs, so there aren't a TON of IMGs at the interviews, but there were a few. There also weren't ANY DOs at all. Furthermore, if there WERE a TON of IMGs at rads interviews of any caliber, that would be completely disproving your point that the Caribbean isn't a viable option, as they'd be getting interviews in competitive residencies en masse. In truth it's hard for both DOs and IMGs to get interviews at mid-upper tier university programs but my experience is that especially in NY, IMGs do pretty well even in more competitive specialties, whereas DOs are mostly relegated to the AOA match for the more competitive specialties.
I think I've answered this one multiple times now... But I'll give it another try, maybe you'll understand this time

...
1) The match data speaks for itself, unless there is a NRMP conspiracy against FMGs/IMGs ... See link above and feel free to complain to NRMP, if you think their data is inaccurate...
2) As I replied to you in another thread regarding this very subject, just because you didn't see anyone doesn't mean they didn't interview DOs, because they obviously do or they wouldn't match.... I also didn't see anyone at my well over 10 IM interviews, some at very top tier places, from a number of US MD schools (e.g. Univ. of ND, Univ. of SD, Univ. of Missouri, LSU, Tulane, Univ. of TN, Toledo, and the list goes on and on [If I think about it hard enough I can name at least 30 schools where I didn't see any of their students]).... That doesn't mean students from those schools didn't get IM interviews; it just means that I didn't run into them....
3) Also, since we are on topic, almost 3 times as many DOs match ACGME than AOA for radiology specifically (due to number of available spots)....