title: Photon radiotherapy has reached its limit in terms of catching up dosimetrically with proton therapy.
authors.affiliation: Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114 (Tel: 617-726-5847; E-mail: hpaganetti@mgh.harvard.edu).
authors.forename: Harald
authors.initials: H
authors.lastname: Paganetti
authors.affiliation: Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland 21201-1595 (Tel: 410-328-0324; E-mail: cyu002@umaryland.edu).
authors.forename: Cedric X
authors.initials: CX
authors.lastname: Yu
mesh_terms: D006801:Humans; D017785:Photons / Q000627:therapeutic use; D061766:Proton Therapy / Q000295:instrumentation / Q000379:methods*; D011874:Radiometry; D011879:Radiotherapy Dosage; D050397:Radiotherapy, Intensity-Modulated