11C-methionine PET improves the target volume delineation of meningiomas treated with stereotactic fractionated radiotherapy. - Grosu,A.L.; Weber,W.A.; Astner,S.T.; Adam,M.; Krause,B.J.; Schwaiger,M.; Molls,M.; Nieder,C. (Int J Radiat Oncol Biol Phys, 2006)