title: Engineering modifications for dynamic stereotactically assisted radiotherapy.
abstract: To perform dynamic stereotactic radiotherapy, a number of modifications to the commercial linear accelerator were required and these are described in this report. A couch drive system was added to rotate the couch in synchrony with the gantry. A high dose rate beam for this technique is acquired through a head modification, which allows easy removal of the radiation field flattener. Because of these modifications, a number of changes and additions were required to the linac interlock system, including a complete new chain of interlocks for use with the stereotactic technique.
authors.affiliation: Medical Physics Division, Toronto-Bayview Regional Cancer Center, Ontario, Canada.
authors.forename: B A
authors.initials: BA
authors.lastname: Gillies
authors.forename: P F
authors.initials: PF
authors.lastname: O'Brien
authors.forename: R
authors.initials: R
authors.lastname: McVittie
authors.forename: C
authors.initials: C
authors.lastname: McParland
authors.forename: H
authors.initials: H
authors.lastname: Easton
mesh_terms: D001698:Biomedical Engineering; D055592:Biophysical Phenomena; D001703:Biophysics; D001921:Brain / Q000601:surgery; D006801:Humans; D008961:Models, Structural; D016634:Radiosurgery / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted; D012399:Rotation