Share Email Print
cover

Proceedings Paper

Screen optics effects on DQE in digital radiography: spatial frequency effects
Author(s): A. R. Lubinsky; W. Zhao; Katsuhiko Suzuki
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The effect of screen optics on the spatial-frequency-dependent DQE of digital radiographic systems, expressed as the Lubberts factor L(f), is studied for both isotropic granular and structured columnar (CsI) x-ray screens. Analytical models for L(f) are derived from diffusion theory for isotropic screens, and optical ray tracing methods are also used to obtain depth-dependent line spread functions, MTF's, and Lubberts factors for both isotropic and columnar screens. The theoretical methods are used to investigate the dependence of L(f) on backing reflectance, thickness, x-ray absorption coefficient, and screen type. An experimental method to estimate L(f), in which an electron multiplying charge coupled device (EMCCD) is used to image individual x-ray bursts, is described. Preliminary results are obtained from data on sample screens, and are compared with the theory.

Paper Details

Date Published: 18 March 2008
PDF: 12 pages
Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69134F (18 March 2008); doi: 10.1117/12.772973
Show Author Affiliations
A. R. Lubinsky, SUNY (United States)
W. Zhao, SUNY (United States)
Katsuhiko Suzuki, Hamamatsu Photonics K.K. (Japan)


Published in SPIE Proceedings Vol. 6913:
Medical Imaging 2008: Physics of Medical Imaging
Jiang Hsieh; Ehsan Samei, Editor(s)

© SPIE. Terms of Use
Back to Top