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Classification of subtask types and skill levels in robot-assisted surgery using EEG, eye-tracking, and machine

Somayeh B Shafiei1, Saeed Shadpour2, James L Mohler3

  • 1The Intelligent Cancer Care Laboratory, Department of Urology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA. Somayeh.besharatshafiei@roswellpark.org.

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|July 22, 2024
PubMed
Summary

Machine learning models using electroencephalogram (EEG) and eye-tracking data can accurately classify robot-assisted surgery (RAS) subtasks and skill levels. This approach enhances objective evaluation for surgical education and patient safety.

Keywords:
CystectomyDissectionHysterectomyNephrectomy

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Area of Science:

  • Robotics and Machine Learning in Surgery
  • Biomedical Signal Processing
  • Surgical Education Technology

Background:

  • Objective evaluation of surgical skills in robot-assisted surgery (RAS) is crucial for training and patient safety.
  • Current assessment methods may lack standardization and objectivity.
  • Novel approaches are needed to enhance the precision of skill evaluation in RAS.

Purpose of the Study:

  • To introduce and evaluate machine learning (ML) techniques for identifying surgical subtasks and classifying skill levels in RAS.
  • To utilize electroencephalogram (EEG) and eye-tracking data for objective skill assessment.
  • To compare the performance of different ML models in classifying RAS performance.

Main Methods:

  • Collected EEG and eye-tracking data from surgeons performing nine distinct RAS subtasks on pigs.
  • Employed four ML models: logistic regression, random forest, gradient boosting, and extreme gradient boosting (XGB) for multi-class classification.
  • Utilized a 80/20 train-test split, optimized hyperparameters via grid search with fivefold cross-validation, and ensured reliability through 30 iterations of train-test splits.

Main Results:

  • The ML approach demonstrated superior performance in classifying RAS subtasks and skill levels compared to existing methods.
  • XGB and random forest models achieved high accuracy rates of 88.49% and 88.56%, respectively, with no significant difference between them.
  • The models successfully differentiated between various surgical subtasks and skill levels based on neurophysiological and visual data.

Conclusions:

  • ML models show significant potential to improve the objectivity and precision of RAS subtask and skill evaluation.
  • This study represents a step towards more refined, objective, and standardized RAS training and competency assessment.
  • Future research should focus on optimizing models for challenging subtask classes identified in this study.