What does DQE say about lesion detectability in digital radiography

A. R. Pineda, Harrison H Barrett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)

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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.E. Antonuk, M.J. Yaffe
Pages561-569
Number of pages9
Volume4320
DOIs
StatePublished - 2001
EventMedical Imaging 2001: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 18 2001Feb 20 2001

Other

OtherMedical Imaging 2001: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/18/012/20/01

Fingerprint

Radiography
radiography
Quantum efficiency
lesions
quantum efficiency
figure of merit
Signal to noise ratio
signal to noise ratios
Pixels
pixels
sampling
analogs
Sampling
formulations
shift

Keywords

  • Detectability
  • Digital radiography
  • DQE
  • Image quality
  • NEQ
  • SNR

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Pineda, A. R., & Barrett, H. H. (2001). What does DQE say about lesion detectability in digital radiography. In L. E. Antonuk, & M. J. Yaffe (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4320, pp. 561-569) https://doi.org/10.1117/12.430880

What does DQE say about lesion detectability in digital radiography. / Pineda, A. R.; Barrett, Harrison H.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / L.E. Antonuk; M.J. Yaffe. Vol. 4320 2001. p. 561-569.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pineda, AR & Barrett, HH 2001, What does DQE say about lesion detectability in digital radiography. in LE Antonuk & MJ Yaffe (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4320, pp. 561-569, Medical Imaging 2001: Physics of Medical Imaging, San Diego, CA, United States, 2/18/01. https://doi.org/10.1117/12.430880
Pineda AR, Barrett HH. What does DQE say about lesion detectability in digital radiography. In Antonuk LE, Yaffe MJ, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4320. 2001. p. 561-569 https://doi.org/10.1117/12.430880
Pineda, A. R. ; Barrett, Harrison H. / What does DQE say about lesion detectability in digital radiography. Proceedings of SPIE - The International Society for Optical Engineering. editor / L.E. Antonuk ; M.J. Yaffe. Vol. 4320 2001. pp. 561-569
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