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Related Experiment Videos

Rater agreement in lung scintigraphy

F Christiansen1, T Andersson, H Rydman

  • 1Department of Diagnostic Radiology, Orebro Medical Center Hospital, Sweden.

Acta Radiologica (Stockholm, Sweden : 1987)
|September 1, 1996
PubMed
Summary

Experienced radiologists showed moderate agreement interpreting lung scans, similar to original standards but lower than consensus-trained experts. This highlights challenges in comparing intermediate probability findings across different hospitals.

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Area of Science:

  • Radiology
  • Nuclear Medicine
  • Diagnostic Imaging

Background:

  • The PIOPED (Prospective Investigation of Pulmonary Embolism Diagnosis) criteria are standard for interpreting ventilation-perfusion scintigraphy.
  • Excellent agreement rates are achieved when consensus-trained, experienced raters use these criteria.

Purpose of the Study:

  • To assess agreement rates between two experienced radiologists from different institutions without consensus training.
  • To evaluate inter-rater reliability in interpreting ventilation-perfusion scintigraphy using PIOPED criteria.

Main Methods:

  • Two experienced radiologists independently reviewed 195 patient cases.
  • A subset of 72 patients with intermediate probability of pulmonary embolism, previously assessed by pulmonary angiography, was included.

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Main Results:

  • Moderate agreement was observed, with a kappa value of 0.54.
  • Agreement was significantly lower than that reported for consensus-trained raters.
  • Low consistency (proportional agreement 0.39) was noted specifically within the intermediate probability category.

Conclusions:

  • Moderate inter-rater agreement complicates comparisons of scintigraphic findings across different hospitals.
  • Further research is crucial for accurate diagnosis, especially for intermediate probability cases of pulmonary embolism.