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Digital chest imaging using a 57-cm image intensifier: A receiver-operating characteristic study of user performance

  • Gerhard W. Brauer
  • Paul D. Fisher
  • Delmer B. Pengelly
  • Gordon W. Ritchie
Article

Abstract

Chest radiography provides one of the great challenges to digital diagnostic imaging because of (1) the relatively large size of the chest field, (2) the contrast range required to resolve subtle pathological changes in soft tissue density, and (3) the high degree of spatial resolution required to discriminate pathological detail. The field size problem was resolved by using a 57-cm image intensifier whose video output of the chest could be digitized. The issue of contrast resolution was addressed in a recently completed receiver-operating characteristic study of the detectability of low-contrast densities in a humanoid chest phantom. The latter indicated that, despite the smaller size of the digital image, they were adequate for resolving clinically significant soft-tissue densities. The question of spatial resolution in digital diagnostic images is addressed in the study presented. A set of 41 clinical cases were selected to provide the typical range of diagnostic type experienced in routine diagnostic radiology. The images were each presented as conventional film, digital laser-printer, and digital video images. The results of an ROC analysis of five readers’ performance in each of the viewing modes is presented.

Keywords

Diffuse Signal Digital Imaging System Video Output Digital Chest Conventional Film 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Fisher PD, Nosil J, Ritchie GW, et al: Clinically based archive model for a picture archive and communication system. Proceedings of the Society for Photo-optical Instrumentation Engineers 914:1097–1104, 1988Google Scholar
  2. 2.
    Fisher PD, Brauer GW, Grover B: Medical image communication and management in: Proceedings of the Canadian Conference on Electrical and Computer Engineering. Vancouver, British Columbia, 1988, pp 764–767Google Scholar
  3. 3.
    Kundle HL: Digital projection radiography of the chest. Radiology 158:274–276, 1986Google Scholar
  4. 4.
    Brauer GW, Fisher PD, Hanley JA, et al: Signal detection in digital chest-phantom images acquired with an image intensifier. J Digital Imaging 2:42–47, 1989CrossRefGoogle Scholar
  5. 5.
    Fisher PD, Brauer GW: Impact of image size on effectiveness of digital imaging systems. J Digital Imaging 2:39–41, 1989CrossRefGoogle Scholar
  6. 6.
    Seeley GW, Pond GD, McNeill KM, et al: Comparison of film/screen to electronic review consoles: Phase II. Proceedings of the Society for Photo-optical Instrumentation Engineers 914:892–897, 1988Google Scholar
  7. 7.
    Ewen K, John V, Lauber-Altmann I, et al: Radiation exposure and image quality: A comparison between different chest radiography techniques. Electromedica 55:18–20, 1987Google Scholar
  8. 8.
    Kheddache S, Mansson LG, Schlossman D, et al: Digital chest radiography with a large-screen image intensifier. Electromedica 55:21–27, 1987Google Scholar
  9. 9.
    Nosil J, Justice g, Fisher P, et al: A prototype multimodality picture archive and communication system at Victoria General Hospital. Proceedings of the Society for Photooptical Instrumentation Engineers 914:1362–1378, 1988Google Scholar
  10. 10.
    MacMahon H, Metz CE, Doi T, et al: Digital chest radiography: Effect on diagnostic accuracy of hard copy, conventional video, and reverses gray scale video display formats. Radiology 168:669–673, 1988PubMedGoogle Scholar

Copyright information

© Society for Imaging Informatics in Medicine 1990

Authors and Affiliations

  • Gerhard W. Brauer
    • 1
    • 2
  • Paul D. Fisher
    • 1
    • 2
  • Delmer B. Pengelly
    • 1
    • 2
  • Gordon W. Ritchie
    • 1
    • 2
  1. 1.School of Health Information ScienceUniversity of VictoriaVictoriaCanada
  2. 2.Department of Medical ImagingVictoria General HospitalVictoriaCanada

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