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Proceedings Paper

The Effect Of AMBER (Advanced Multiple Beam Equalization Radiography) On Image Quality Of Film And Stimulable Phosphor Plates
Author(s): Robert B. Noordveld; Leo J. Schultze Kool; Herman M. Kroon; Paul R. Algra; George W. Seeley; Henri E. Lemmers; Hugo Vlasbloem; Volker Biebesheimer
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Paper 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.

Paper Details

Date Published: 1 May 1989
PDF: 8 pages
Proc. SPIE 1090, Medical Imaging III: Image Formation, (1 May 1989); doi: 10.1117/12.953193
Show Author Affiliations
Robert B. Noordveld, University Hospital Leiden (The Netherlands)
Leo J. Schultze Kool, University Hospital Leiden (The Netherlands)
Herman M. Kroon, University Hospital Leiden (The Netherlands)
Paul R. Algra, University Hospital Leiden (The Netherlands)
George W. Seeley, University of Arizona (United States)
Henri E. Lemmers, University Hospital Leiden (The Netherlands)
Hugo Vlasbloem, Oldelft Optische Industrie (The Netherlands)
Volker Biebesheimer, Philips Medical Systems (Germany)

Published in SPIE Proceedings Vol. 1090:
Medical Imaging III: Image Formation
Samuel J. Dwyer; R. Gilbert Jost; Roger H. Schneider, Editor(s)

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