Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

What does DQE say about lesion detectability in digital radiography?

[+] Author Affiliations
Angel R. Pineda

Univ. of Arizona (USA)

Harrison H. Barrett

Univ. of Arizona and Optical Sciences Ctr./Univ. of Arizona (USA)

Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, 561 (June 28, 2001); doi:10.1117/12.430880
Text Size: A A A
From Conference Volume 4320

  • Medical Imaging 2001: Physics of Medical Imaging
  • Larry E. Antonuk; Martin J. Yaffe
  • San Diego, CA | February 17, 2001

abstract

Currently, there is significant interest in quantifying the performance of digital radiography systems. Digital radiography systems can be thought of as continuous linear shift-invariant systems followed by sampling. This view, along with the large number of pixels used for flat-panel systems, has motivated much of the work which attempts to extend figures of merit developed for analog systems, in particular, the detective quantum efficiency (DQE) and the noise equivalent quanta (NEQ). A more general approach looks at the system as a continuous-to-discrete mapping and evaluates the signal-to-noise ratio (SNR) completely from the discrete data. In this paper, we study the effect of presampling blur on these figures of merit. We find that even in this idealized model the DQE/NEQ formulations do not accurately track the behavior of the fully digital SNR. Therefore, DQE/NEQ cannot be viewed as indicators of the signal-known-exactly/background-known-exactly (SKE/BKE) detectability. In order to make design decisions by optimizing detectability one must work with the fully digital definition of detectability.

© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Angel R. Pineda and Harrison H. Barrett
"What does DQE say about lesion detectability in digital radiography?", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, 561 (June 28, 2001); doi:10.1117/12.430880; http://dx.doi.org/10.1117/12.430880


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.