16 December 1993 Real-time imaging detectors for portal imaging
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Abstract
This paper reviews the status of real-time imaging systems which are used in radiation-therapy for radiotherapy localization and verification. Imaging systems under review include (1) metal- fluorescent screens, optically coupled to video cameras; (2) metal-phosphor screen in direct contact with two-dimensional photo-diode array (flat panel detector); (3) two-dimensional liquid ionization chamber; and (4) linear diode arrays. These systems permit frequent verification during the treatment and have been shown to be very useful. Unfortunately the image quality achieved, while impressive considering the short time the devices have been on the market, is significantly inferior to that which is available from the metal/film combination (port film).
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Hans Roehrig, Hans Roehrig, Chee-Way Cheng, Chee-Way Cheng, } "Real-time imaging detectors for portal imaging", Proc. SPIE 2009, X-Ray Detector Physics and Applications II, (16 December 1993); doi: 10.1117/12.164734; https://doi.org/10.1117/12.164734
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