Comparison of VRX CT scanners geometries

Frank A. DiBianca; Roman Melnyk; Christopher N. Duckworth; Stephan Russ; Lawrence M. Jordan; Joseph S. Laughter

doi:10.1117/12.430890

28 June 2001 Comparison of VRX CT scanners geometries

Frank A. DiBianca, Roman Melnyk, Christopher N. Duckworth, Stephan Russ, Lawrence M. Jordan, Joseph S. Laughter

Proceedings Volume 4320, Medical Imaging 2001: Physics of Medical Imaging; (2001) https://doi.org/10.1117/12.430890
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

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.

Citation Download Citation

Frank A. DiBianca, Roman Melnyk, Christopher N. Duckworth, Stephan Russ, Lawrence M. Jordan, and Joseph S. Laughter "Comparison of VRX CT scanners geometries", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); https://doi.org/10.1117/12.430890

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