Screen design for flat-panel imagers in diagnostic radiology

David P. Trauernicht; John Yorkston

doi:10.1117/12.317048

24 July 1998 Screen design for flat-panel imagers in diagnostic radiology

David P. Trauernicht, John Yorkston

Proceedings Volume 3336, Medical Imaging 1998: Physics of Medical Imaging; (1998) https://doi.org/10.1117/12.317048
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

The image quality of Gd₂O₂S:Tb phosphor screens used in a flat-panel photodiode array system is examined. The presampled Modulation Transfer Function (MTF), the Normalized Noise Power Spectrum surface (NNPS) and the resulting Detective Quantum Efficiency (DQE) are discussed for a variety of screens used in such a system. A technique for extracting the limiting DQE for a system with significant electronic noise is described. This allows for the examination of the imaging performance of the X-ray converter (or phosphor screen) and removes issues of photodiode array and readout electronics performance. It is shown that depending on the metric being used to judge the imaging performance (i.e., MTF or DQE), it is possible to design a more optimal screen than those currently available for use in screen-film imaging. Evidence is also presented for a significant degradation of the DQE at higher spatial frequencies due to the variation in the light spread MTF through the depth of the screen.

Citation Download Citation

David P. Trauernicht and John Yorkston "Screen design for flat-panel imagers in diagnostic radiology", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); https://doi.org/10.1117/12.317048

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

Includes PDF, HTML & Video, when available