Screen optics effects on DQE in digital radiography: spatial frequency effects

A. R. Lubinsky; W. Zhao; Katsuhiko Suzuki

doi:10.1117/12.772973

18 March 2008 Screen optics effects on DQE in digital radiography: spatial frequency effects

A. R. Lubinsky, W. Zhao, Katsuhiko Suzuki

Author Affiliations +

Proceedings Volume 6913, Medical Imaging 2008: Physics of Medical Imaging; 69134F (2008) https://doi.org/10.1117/12.772973
Event: Medical Imaging, 2008, San Diego, California, United States

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.

Citation Download Citation

A. R. Lubinsky, W. Zhao, and Katsuhiko Suzuki "Screen optics effects on DQE in digital radiography: spatial frequency effects", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69134F (18 March 2008); https://doi.org/10.1117/12.772973

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE