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Related Experiment Videos

Observed lung markings in normal chest roentgenograms

T Vehmas1, H Tikkanen, S Bondestam

  • 1Department of Radiology, University of Helsinki, Finland.

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|July 1, 1993
PubMed
Summary

Radiologists and trainees consistently ranked lung markings similarly over time. However, agreement between different observers was poor, indicating variability in interpreting chest X-rays.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Diagnostic Imaging

Background:

  • Assessing lung parenchymal markings on chest X-rays is crucial for diagnosis.
  • Variability in interpretation can impact patient care.
  • Understanding observer agreement is key to improving diagnostic accuracy.

Purpose of the Study:

  • To evaluate the intraobserver and interobserver agreement in ranking lung parenchymal markings on digital chest posterior-anterior roentgenograms.
  • To determine if radiologic training influences the interpretation of lung markings.
  • To assess the correlation of expert rankings with patient demographics like age and smoking history.

Main Methods:

  • 42 healthy individuals' digital chest PA roentgenograms were ranked twice by 6 observers (3 radiologists, 2 residents, 1 radiographer) with at least a 5-day interval.

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  • Observers ranked images based on increasing lung parenchymal markings.
  • Statistical analysis was performed to assess intraobserver and interobserver correlations.

    • Main Results:

    • All observers demonstrated good intraobserver correlation (p < 0.05-0.001), indicating consistent personal rankings over time.
    • Interobserver agreement was generally poor, even among experienced radiologists.
    • Radiologic training appeared to mitigate the influence of confounding factors like respiration and body constitution.
    • The "golden standard" ranking by radiologists did not correlate with patient age or smoking habits.

    Conclusions:

    • While individual interpretation consistency (intraobserver agreement) is high across experience levels, the agreement between different observers (interobserver agreement) for lung parenchymal markings is poor.
    • Radiologic training may improve the reliability of interpretation by reducing bias from non-pathological factors.
    • Current methods of ranking lung markings may not be influenced by patient age or smoking history, suggesting a need for more objective assessment tools.