1 May 1989 The Effect Of AMBER (Advanced Multiple Beam Equalization Radiography) On Image Quality Of Film And Stimulable Phosphor Plates
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Abstract
The AMBER system is an equalization-radiography system (Oldeift), which uses a horizontal slit-beam. The system allows local exposure control by means of a feed back loop between detectors in front of the film and modulators in front of the X-ray tube. The AMBER-system reduces the Scatter-to-Primary-Ratio (SPR) in the mediastinum. The SPR reduction is related to the compression-curve of the system. In this study the SPR-reduction was 37%. A contrast-detail phantom was designed and used in combination with a chest-phantom. Contrast-detail-studies were performed to evaluate the improvement of image quality when film and stimulable phosphor plates were used as detector. Film images(150) and stimulable-phosphor-plate images (300) obtained with a conventional exposure technique and with the use of AMBER, were evaluated by four observers (radiologists). Half of the stimulable pho'sphor plates were digitally enhanced (adaptive filtration). Application of the AMBER-system significantly improves the image quality of film and stimulable phosphor plates in the mediastinum while no change of image quality in the lung was found. The discernability of low contrast details was not significantly improved by adaptive filtration in regions with adequate exposure, a small improvement was seen in "underexposed" regions.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert B. Noordveld, Robert B. Noordveld, Leo J. Schultze Kool, Leo J. Schultze Kool, Herman M. Kroon, Herman M. Kroon, Paul R. Algra, Paul R. Algra, George W. Seeley, George W. Seeley, Henri E. Lemmers, Henri E. Lemmers, Hugo Vlasbloem, Hugo Vlasbloem, Volker Biebesheimer, Volker Biebesheimer, } "The Effect Of AMBER (Advanced Multiple Beam Equalization Radiography) On Image Quality Of Film And Stimulable Phosphor Plates", Proc. SPIE 1090, Medical Imaging III: Image Formation, (1 May 1989); doi: 10.1117/12.953193; https://doi.org/10.1117/12.953193
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