There are a number of major companies that make cyclotrons now. IBA is probably the largest company; it's a Belgian company. GE Healthcare makes cyclotrons; there's a Japanese company that makes them; there's a Canadian company that makes cyclotrons in Vancouver, Ebco . So it's a pretty healthy business, I would say. As for PET scanners, there are again a number of companies around the world that make PET scanners too.
On June 17th, 2008. See this statement in context.