Video techniques for on-line portal imaging |
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| Authors: | S Shalev T Lee K Leszczynski S Cosby T Chu L Reinstein A Meek |
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| Institution: | Manitoba Cancer Treatment and Research Foundation, Winnipeg, Canada. |
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| 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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