IMRT

It took some time to get popular

Hits raise last year: 7.9% for IMRT (1982) (last 3 years 7.1%) 2.2% for HT (1995) (last 3 years 17.8%)

28% for IMAT (1995) (last 3 years 26.9%) 77% for VMAT (2005) (last 3 years 58.0%)