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Variability in the analysis of coronary arteriograms
Insights
Coronary arteriogram readings show significant variability among interpreters. Reader experience is key to improving accuracy in detecting coronary artery stenosis from angiograms.
Area of Science:
- Cardiovascular imaging
- Medical diagnostics
- Radiology
Background:
- Coronary arteriography is crucial for diagnosing coronary artery disease.
- Inter-observer variability in interpreting these images can impact clinical decisions.
Purpose of the Study:
- To quantify the variability in coronary arteriogram readings among different interpreters.
- To identify factors influencing the accuracy of stenosis assessment.
Main Methods:
- Eleven readers interpreted cine films from ten patients.
- A three-reader expert panel provided a consensus standard.
- Variability was assessed by comparing individual readings to the panel standard.
Main Results:
- Significant variability was observed between individual readers and the expert panel.
- Average standard deviation for segmental stenosis estimation was 18%.
- Disagreement on the number of major vessels with 70% stenosis occurred 31% of the time.
Conclusions:
- Inter-reader variability in coronary arteriogram interpretation is substantial.
- Factors like distal segment analysis, nonopacified segments, and image quality influence discrepancies.
- Reader experience is the most critical factor for accurate interpretation.
Abstract:
Variability in coronary arteriogram readings was studied by having cine films from ten patients read by eleven readers. Three of the eleven subsequently met as an expert panel to provide a joint evaluation which could serve as a standard. Considerable variability was found between individual readers and between readers and the panel. The average standard deviation for estimation of any segmental stenosis by any single reader was 18%. Disagreement about the number of major vessels with a 70% stenosis occurred 31% of the time. Discrepancies were most likely to occur in analyzing distal arterial segments, in reading nonopacified segments, and during analysis of films showing more severe disease or having poorer technical quality. Recent experience in reading arteriograms seemed to be the most important characteristic in determining the accuracy of a reader. A protocol for the use of three readers is suggested.