title: Distal penetration of proton beams: the effects of air gaps between compensating bolus and patient.
authors.affiliation: Harvard Cyclotron Laboratory, Harvard University, Cambridge, MA 02138.
authors.forename: J M
authors.initials: JM
authors.lastname: Sisterson
authors.forename: M M
authors.initials: MM
authors.lastname: Urie
authors.forename: A M
authors.initials: AM
authors.lastname: Koehler
authors.forename: M
authors.initials: M
authors.lastname: Goitein
mesh_terms: D000388:Air; D003198:Computer Simulation; D006801:Humans; D009010:Monte Carlo Method; D010315:Particle Accelerators; D011522:Protons; D011829:Radiation Dosage; D011882:Radiotherapy, High-Energy
chemical_list: D011522:Protons