By Martin J. Yaffe (auth.), Nico Karssemeijer, Martin Thijssen, Jan Hendriks, Leon van Erning (eds.)

In June 1998 the Fourth overseas Workshop on electronic Mammography used to be held in Nijmegen, The Netherlands, the place it was once hosted through the dep. of Radiology of the college clinic Nijmegen. This sequence of conferences used to be initiated on the 1993 SPIE Biomedical photo Processing convention in San Jose, united states, the place a couple of classes have been fullyyt dedicated to mammographic picture research. At very profitable next workshops held in York, united kingdom (1994) and Chicago, united states (1996), the scope of the convention used to be broadened, developing a platform for presentation and dialogue of recent advancements in electronic mammog­ raphy. issues which are addressed at those conferences are computer-aided analysis, photo processing, detector improvement, method layout, observer functionality and medical assessment. The target is to convey researchers from universities, breast melanoma specialists, and engineers jointly, to replace details and current new clinical advancements during this swiftly evolving box. This booklet comprises the entire medical papers and posters provided on the paintings­ store in Nijmegen. Contributions got here from as many as 20 varied nations and a hundred ninety contributors attended the assembly. At a technical express businesses demon­ strated new items and paintings in development. Abstracts of all papers have been reviewed by means of contributors of the medical committee. a few of the authorised papers had first-class caliber, yet because of constrained house now not them all will be incorporated as complete papers in those court cases. Papers that have been rated excessive by means of the reviewers are integrated as lengthy or brief papers, others seem as prolonged abstracts within the final chapter.

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30 E. BEUVILLE ET AL. 4. X-Ray Focusing The focusing concept was inspired by Snigirev et al, who focused a synchrotron x-ray beam by drilling small holes in a piece of aluminum[8]. To improve focusing, we will use parabolic holes in polymethylmetacrylate (PMMA) with less x-ray absorption than aluminum. Manufacturing of the x-ray lens will take place in mid-April 1998 followed by evaluation and integration into the imaging system. Gain vs. energy (from ray-tracing simulations) for a typical geometry is shown in Fig.

Salvi, "Introduction to Applied Statistical Signal Analysis", IRWIN 1991. A. K. Jain, "Fundamentals of Digital Image Processing", Prentice Hall 1989. , Los Angeles, CA, 90095-1721, USA 1. Introduction Screen film mammography is currently accepted as being the best method available for the early detection of breast cancer. Digital mammography promises to replace screen film mammography as the primary screening tool of the future. The primary advantage it offers is the ability to perform image processing for optimisation of image contrast, which may be especially useful for lesion detection in patients with dense breasts [I] and may, despite its lower spatial resolution, make it more effective than conventional mammography at detecting lesions.

Conclnsions The development of the full-field digital mammography system was described. The system has been used successfully in several hospitals, providing high quality images on a routine basis. The system is easy to use, with little special training required of the technologists. The systems are still in continuous use to accumulate additional data and operational experience. , 1991, "Digital Mammography", presented at the National Cancer Institute Consensus Conference "Breast Imaging: State of the Art and Technologies of the Future", September, 1991.

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