2017_SBRT_Course Book

Historical vs ICRU vs SBRT

• Historical (on the xx% isodose) • High central dose is ok • Maximal dose gradient outside PTV • Plan optimization through variation of beam edge to PTV distance • ICRU 50 and 62 and 83 • Homogeneous dose in PTV; high dose NOT ok • SBRT • High central dose is ok • Maximal dose gradient outside PTV • Plan optimization through use of objectives • IMRT/VMAT/FFF etc possible