Video techniques for on-line portal imaging.
The application of on-line portal imaging techniques to the verification of treatment precision is reviewed. The design parameters for a video portal imaging system are described, and the optimization of image quality is discussed with particular emphasis on photon noise. On-line images are presented for a head phantom imaged on a 4 MV linac, and compared with a conventional portal film. The relative advantages of an on-line system are compared with conventional portal film analysis.
Shalev
S
S
Manitoba Cancer Treatment and Research Foundation, Winnipeg, Canada.
Lee
T
T
Leszczynski
K
K
Cosby
S
S
Chu
T
T
Reinstein
L
L
Meek
A
A
D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation; D011881:Radiotherapy, Computer-Assisted; D014741:Video Recording / Q000379:methods*