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Proceedings Paper

Digital video system for on-line portal verification
Author(s): Konrad W. Leszczynski; Shlomo Shalev; N. Scott Cosby
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Paper Abstract

A digital system has been developed for on-line acquisition, processing and display of portal images during radiation therapy treatment. A metal/phosphor screen combination is the primary detector, where the conversion from high-energy photons to visible light takes place. A mirror angled at 45 degrees reflects the primary image to a low-light-level camera, which is removed from the direct radiation beam. The image registered by the camera is digitized, processed and displayed on a CRT monitor. Advanced digital techniques for processing of on-line images have been developed and implemented to enhance image contrast and suppress the noise. Some elements of automated radiotherapy treatment verification have been introduced.

Paper Details

Date Published: 1 July 1990
PDF: 5 pages
Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); doi: 10.1117/12.18817
Show Author Affiliations
Konrad W. Leszczynski, Manitoba Cancer Treatment and Research Foundation (Canada)
Shlomo Shalev, Manitoba Cancer Treatment and Research Foundation (Canada)
N. Scott Cosby, Manitoba Cancer Treatment and Research Foundation (Canada)


Published in SPIE Proceedings Vol. 1231:
Medical Imaging IV: Image Formation
Roger H. Schneider, Editor(s)

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