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Proceedings Paper

Novel x-ray detector with multiple-screen-CCD sensors for real-time diagnostic imaging
Author(s): Cornelis H. Slump; Geert-Jan Laanstra; Henny Kuipers; Mark A. Boer; Alex G. J. Nijmeijer; Mark J. Bentum; Rudolf Kemner; Henk J. Meulenbrugge; Ruud M. Snoeren
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Paper Abstract

In this contribution we propose an alternative x-ray detector based upon multiple screen-CCD sensor combinations. The impinging x-ray quanta are detected by a scintillator screen (e.g. CsI) and converted to light photons (typ. 1200 photons per absorbed x-ray quantum). We propose a number of lens-CCD sensors for standard video performance to detect the light photons coming out of an x-ray intensifying screen. Due to the smaller demagnification the coupling efficiency is better even with moderate quality (F number) lenses. We thus obtain a matrix of subimages, the system is constructed such that the subimages partially overlap. With digital image processing we construct from the subimages a single high quality image. Special hardware (incl. ASICS) has been developed for imaging at video rates, enabling (almost) fluoroscopy with this new detector. We show a viable digital x-ray imaging detector concept by means of our 2 by 2 CCD camera prototype and real-time processing engine. The image quality, MTF and noise properties are satisfactory and well in the diagnostic application range.

Paper Details

Date Published: 11 April 1996
PDF: 12 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237807
Show Author Affiliations
Cornelis H. Slump, Univ. Twente (Netherlands)
Geert-Jan Laanstra, Univ. Twente (Netherlands)
Henny Kuipers, Univ. Twente (Netherlands)
Mark A. Boer, AEMICS B.V. (Netherlands)
Alex G. J. Nijmeijer, AEMICS B.V. (Netherlands)
Mark J. Bentum, Univ. Twente (Netherlands)
Rudolf Kemner, Philips Medical Systems (Netherlands)
Henk J. Meulenbrugge, Philips Medical Systems (Netherlands)
Ruud M. Snoeren, Philips Medical Systems (Netherlands)

Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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