Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance

Liying Chen, Harrison H Barrett

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

3 Citations (Scopus)

Abstract

Recent advances in model observers that predict human perceptual performance now make it possible to optimize medical imaging systems for human task performance. We illustrate the procedure by considering the design of a lens for use in an optically coupled digital mammography system. The channelized Hotelling observer is used to model human performance, and the channels chosen are differences of Gaussians (DOGs). The task is detection of a lesion at a random but known location in a clustered lumpy background mimicking breast tissue. The entire system is simulated with a Monte Carlo application according to the physics principles, but the main system component under study is the lens that couples a fluorescent screen to a CCD detector. The bigger the aperture is, the larger the portion of light is coupled to the CDD, but the more severe the aberrations are, so the worse the image blur is. So when changing the stop size, the signal (lesion) detectability of human observers associated with this task also changes. The SNR of the channelized Hotelling observer is used to quantify this detectability. In this paper, plots of channelized Hotelling SNR vs. signal location for various lens apertures and working distances are presented. These plots thus illustrate the tradeoff between coupling efficiency and blur in a task-based manner. In this way, the channelized Hotelling SNR is used as a merit function for lens design.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsP. Chakraborty, E.A. Krupinski
Pages63-70
Number of pages8
Volume5034
DOIs
StatePublished - 2003
EventMedical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment - San Diego, CA, United States
Duration: Feb 18 2003Feb 20 2003

Other

OtherMedical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment
CountryUnited States
CitySan Diego, CA
Period2/18/032/20/03

Fingerprint

Imaging systems
Lenses
lenses
lesions
Fluorescent screens
plots
apertures
human performance
lens design
digital systems
Mammography
Medical imaging
tradeoffs
Aberrations
Charge coupled devices
breast
aberration
charge coupled devices
Physics
Tissue

Keywords

  • Channelized Hotelling observer
  • Clustered lumpy background
  • Digital mammography
  • Lens design

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Chen, L., & Barrett, H. H. (2003). Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance. In P. Chakraborty, & E. A. Krupinski (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5034, pp. 63-70) https://doi.org/10.1117/12.480331

Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance. / Chen, Liying; Barrett, Harrison H.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / P. Chakraborty; E.A. Krupinski. Vol. 5034 2003. p. 63-70.

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

Chen, L & Barrett, HH 2003, Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance. in P Chakraborty & EA Krupinski (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 5034, pp. 63-70, Medical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment, San Diego, CA, United States, 2/18/03. https://doi.org/10.1117/12.480331
Chen L, Barrett HH. Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance. In Chakraborty P, Krupinski EA, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 5034. 2003. p. 63-70 https://doi.org/10.1117/12.480331
Chen, Liying ; Barrett, Harrison H. / Optimizing lens-coupled digital radiographic imaging systems based on model observers' performance. Proceedings of SPIE - The International Society for Optical Engineering. editor / P. Chakraborty ; E.A. Krupinski. Vol. 5034 2003. pp. 63-70
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