Digital video system for on-line portal verification

Konrad W. Leszczynski; Shlomo Shalev; N. Scott Cosby

doi:10.1117/12.18817

1 July 1990 Digital video system for on-line portal verification

Konrad W. Leszczynski, Shlomo Shalev, N. Scott Cosby

Proceedings Volume 1231, Medical Imaging IV: Image Formation; (1990) https://doi.org/10.1117/12.18817
Event: Medical Imaging '90, 1990, Newport Beach, CA, United States

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.

Citation Download Citation

Konrad W. Leszczynski, Shlomo Shalev, and N. Scott Cosby "Digital video system for on-line portal verification", Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); https://doi.org/10.1117/12.18817

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