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Do mammographic technologists affect radiologists' diagnostic mammography interpretative performance?

Louise M Henderson1, Thad Benefield, J Michael Bowling

  • 11 Department of Radiology, The University of North Carolina, CB 7515, Chapel Hill, NC 27599-7515.

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|March 21, 2015
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Summary
This summary is machine-generated.

The mammography technologist impacts radiologist interpretation of conventional mammograms, but not digital ones. This highlights the importance of technologist skill in diagnostic imaging quality for film-screen mammography.

Keywords:
diagnostic mammographyfalse-positive ratepositive predictive value of biopsysensitivityvariability

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Area of Science:

  • Radiology and Medical Imaging
  • Health Services Research

Background:

  • Radiologist performance in diagnostic mammography is crucial for accurate cancer detection.
  • The role of mammographic technologists in influencing these interpretations requires further investigation.

Purpose of the Study:

  • To evaluate the impact of mammographic technologists on radiologists' interpretative performance in diagnostic mammography.
  • To compare this influence across conventional (film-screen) and digital imaging modalities.

Main Methods:

  • Analysis of 162,755 diagnostic mammograms from 1994-2009, involving 286 radiologists and 303 technologists.
  • Calculation of sensitivity, false-positive rate, and positive predictive value (PPV) for biopsy recommendations, stratified by technologist and modality.
  • Utilized mixed effects logistic regression to assess technologist variability, accounting for clustering effects.

Main Results:

  • Significant technologist variation was observed in sensitivity, false-positive rate, and PPV for conventional mammography.
  • No significant technologist variation was found for digital mammography performance measures.
  • Mean sensitivity, false-positive rate, and PPV differed between conventional and digital modalities, with technologist variation present only in conventional.

Conclusions:

  • Mammographic technologist performance significantly influences radiologist interpretation for conventional mammography, but not digital mammography.
  • Further research is needed to understand the modality-specific differences and explore screening mammography patterns.