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Targeted Training Reduces Search Errors but Not Classification Errors for Hepatic Metastasis Detection at

Scott S Hsieh1, Akitoshi Inoue2, Mariana Yalon2

  • 1Department of Radiology, Mayo Clinic, 200 First St. SW, Rochester, MN 55905 (S.S.H., A.I., M.Y., H.G., P.S.P., J.L.F., S.L., L.Y., C.H.McC., J.G.F.); Department of General Internal Medicine, Mayo Clinic, 200 First St. SW, Rochester, MN 55905 (S.S.H.).

Academic Radiology
|August 11, 2023
PubMed
Summary

A training program improved the detection of liver metastases by reducing search errors in contrast-enhanced abdominal CT scans. However, the training did not significantly decrease classification errors or benefit all radiologist subgroups.

Keywords:
Classification errorsEye trackingRadiologist trainingSearch errors

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Area of Science:

  • Radiology
  • Medical Imaging
  • Hepatobiliary System

Background:

  • Hepatic metastases detection in contrast-enhanced abdominal CT is crucial but prone to errors.
  • Errors occur in both lesion detection (search) and malignancy classification.
  • Improved methods are needed to enhance diagnostic accuracy.

Purpose of the Study:

  • To evaluate a training program designed to reduce search and classification errors in detecting hepatic metastases.
  • To assess the impact of targeted training on radiologist performance in interpreting contrast-enhanced abdominal CT scans.

Main Methods:

  • A single-group prospective pretest-posttest study involving 31 radiologists.
  • Readers interpreted 40 CT exams with 91 liver metastases under eye tracking.
  • Training focused on increasing interpretation time, using specific window settings, and employing coronal reformations, alongside classification practice.

Main Results:

  • Search errors decreased from 11% to 8% (P=.01) after training.
  • No significant reduction in classification errors was observed (P=.97).
  • Jackknife free-response receiver operator characteristic (JAFROC) analysis showed no significant improvement.

Conclusions:

  • Targeted training effectively reduced search errors in hepatic metastases detection on CT.
  • Classification errors were not significantly impacted by the training program.
  • Training benefits were not uniform across all radiologist subgroups, with abdominal subspecialists showing no improvement.