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Proceedings Paper

Comparison of VRX CT scanners geometries
Author(s): Frank A. DiBianca; Roman Melnyk; Christopher N. Duckworth; Stephan Russ; Lawrence M. Jordan; Joseph S. Laughter
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Paper Abstract

A technique called Variable-Resolution X-ray (VRX) detection greatly increases the spatial resolution in computed tomography (CT) and digital radiography (DR) as the field size decreases. The technique is based on a principle called `projective compression' that allows both the resolution element and the sampling distance of a CT detector to scale with the subject or field size. For very large (40 - 50 cm) field sizes, resolution exceeding 2 cy/mm is possible and for very small fields, microscopy is attainable with resolution exceeding 100 cy/mm. This paper compares the benefits obtainable with two different VRX detector geometries: the single-arm geometry and the dual-arm geometry. The analysis is based on Monte Carlo simulations and direct calculations. The results of this study indicate that the dual-arm system appears to have more advantages than the single-arm technique.

Paper Details

Date Published: 28 June 2001
PDF: 9 pages
Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430890
Show Author Affiliations
Frank A. DiBianca, Univ. of Tennessee Health Science Ctr. (United States)
Roman Melnyk, Univ. of Tennessee Health Science Ctr. (United States)
Christopher N. Duckworth, Univ. of Tennessee Health Science Ctr. (United States)
Stephan Russ, Univ. of Tennessee Health Science Ctr. (United States)
Lawrence M. Jordan, Univ. of Tennessee Health Science Ctr. (United States)
Joseph S. Laughter, Univ. of Tennessee Health Science Ctr. (United States)


Published in SPIE Proceedings Vol. 4320:
Medical Imaging 2001: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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