Using the American College of Radiology Thyroid Imaging Reporting and Data System at the Point of Care: Sonographer Performance and Interobserver Variability

Benjamin Wildman-Tobriner, Salmaan Ahmed, Al Erkanli, Maciej A. Mazurowski, Jenny K. Hoang

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to assess inter-observer variability and performance when sonographers assign features to thyroid nodules on ultrasound using the American College of Radiology (ACR) Thyroid Imaging Reporting and Data System (TI-RADS). Fifteen sonographers retrospectively evaluated 100 thyroid nodules and assigned features to each nodule according to ACR TI-RADS lexicon. Ratings were compared with one another and to a gold standard using Fleiss’ and Cohen's kappa statistics, respectively. Sonographers were also asked subjective questions regarding their comfort level assessing each feature, and opinions were compared with performance using a mixed effects model. Sonographers demonstrated only slight agreement for margin (κ = 0.18, 95% confidence interval [CI]: 0.16–0.20) and large comet tail artifact (κ = 0.08, 95% CI: 0.06–0.10) but better performance for macrocalcification (κ = 0.41, 95% CI: 0.39–0.43) and no echogenic foci (κ = 0.52, 95% CI: 0.50–0.54). Sonographer comfort level with different feature assignments did not statistically correlate with performance for a given feature. In conclusion, sonographers using ACR TI-RADS to assign thyroid nodule features on ultrasound demonstrate a range of agreement across features, with margin and large comet tail artifact showing the most variability. These results highlight potential areas of focus for sonographer education efforts as ACR TI-RADS continues to be implemented in radiology departments.

Original languageEnglish (US)
Pages (from-to)1928-1933
Number of pages6
JournalUltrasound in Medicine and Biology
Volume46
Issue number8
DOIs
StatePublished - Aug 2020

Keywords

  • FNA
  • Follow-up
  • TI-RADS
  • Ultrasound

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

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