Carbon Ion Radiotherapy (CIRT)

Here is a new article about the effectiveness of carbon ion radiotherapy for localized primary sarcomas of the extremities:

http://www.ncbi.nlm.nih.gov/pubmed/23068710

According to wikipedia, only 2 facilities offered this technology in 2008 and they were both in Japan:

http://en.wikipedia.org/wiki/Particle_therapy#Carbon_ion_centers_in_operation

According to the following website, there are now 5 facilities but they don't specify where:

http://www.bestcyclotron.com/particletherapy/

Here is an article that talks about the history behind the technology:

http://www.duke.edu/~myhan/kaf1103.pdf