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Updated: Aug 10, 2026

In Vivo Imaging Systems (IVIS) Detection of a Neuro-Invasive Encephalitic Virus
Published on: December 2, 2012
Video techniques for on-line portal imaging
S Shalev1, T Lee, K Leszczynski
1Manitoba Cancer Treatment and Research Foundation, Winnipeg, Canada.
Abstract:
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.
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