title: A variable speed translating couch technique for total body irradiation.
abstract: We have developed a variable speed translating patient couch system for the delivery of total body irradiation (TBI). For a whole body Rando-type phantom, dose variation at mid-plane relative to the prescription point (navel) can be as high as 15% (neck or legs) with a constant velocity. By taking into account variations in body thickness, the intensity modulation radiation therapy, resulting from variable velocities, effectively delivers a uniform dose distribution at mid plane. The couch control user interface, technical aspects and dose planning optimization procedure for determining velocity distribution are described.
authors.affiliation: Département de radio-oncologie, Pavillon L'Hotel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Canada. mario.chretien@chuq.qc.ca
authors.forename: M
authors.initials: M
authors.lastname: Chrétien
authors.forename: C
authors.initials: C
authors.lastname: Côté
authors.forename: R
authors.initials: R
authors.lastname: Blais
authors.forename: L
authors.initials: L
authors.lastname: Brouard
authors.forename: L
authors.initials: L
authors.lastname: Roy-Lacroix
authors.forename: M
authors.initials: M
authors.lastname: Larochelle
authors.forename: R
authors.initials: R
authors.lastname: Roy
authors.forename: J
authors.initials: J
authors.lastname: Pouliot
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D006801:Humans; D009038:Motion; D009369:Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy; D019047:Phantoms, Imaging; D011880:Radiotherapy Planning, Computer-Assisted; D014057:Tomography, X-Ray Computed; D014916:Whole-Body Irradiation / Q000295:instrumentation* / Q000379:methods