A variable speed translating couch technique for total body irradiation.
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.
Chrétien
M
M
Département de radio-oncologie, Pavillon L'Hotel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Canada. mario.chretien@chuq.qc.ca
Côté
C
C
Blais
R
R
Brouard
L
L
Roy-Lacroix
L
L
Larochelle
M
M
Roy
R
R
Pouliot
J
J
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