High density optical neuroimaging predicts surgeons's subjective experience and skill levels

Keles, H.O., Cengiz, C., Demiral, I., Ozmen, M.M. and Omurtag, A. ORCID: 0000-0002-3773-8506, 2021. High density optical neuroimaging predicts surgeons's subjective experience and skill levels. PLoS ONE, 16 (2): e0247117. ISSN 1932-6203

1410757_Omurtag.pdf - Published version

Download (2MB) | Preview


Measuring cognitive load is important for surgical education and patient safety. Traditional approaches of measuring cognitive load of surgeons utilise behavioural metrics to measure performance and surveys and questionnaires to collect reports of subjective experience. These have disadvantages such as sporadic data, occasionally intrusive methodologies, subjective or misleading self-reporting. In addition, traditional approaches use subjective metrics that cannot distinguish between skill levels. Functional neuroimaging data was collected using a high density, wireless NIRS device from sixteen surgeons (11 attending surgeons and 5 surgery resident) and 17 students while they performed two laparoscopic tasks (Peg transfer and String pass). Participant’s subjective mental load was assessed using the NASA-TLX survey. Machine learning approaches were used for predicting the subjective experience and skill levels. The Prefrontal cortex (PFC) activations were greater in students who reported higher-than-median task load, as measured by the NASA-TLX survey. However in the case of attending surgeons the opposite tendency was observed, namely higher activations in the lower v higher task loaded subjects. We found that response was greater in the left PFC of students particularly near the dorso- and ventrolateral areas. We quantified the ability of PFC activation to predict the differences in skill and task load using machine learning while focussing on the effects of NIRS channel separation distance on the results. Our results showed that the classification of skill level and subjective task load could be predicted based on PFC activation with an accuracy of nearly 90%. Our finding shows that there is sufficient information available in the optical signals to make accurate predictions about the surgeons’ subjective experiences and skill levels. The high accuracy of results is encouraging and suggest the integration of the strategy developed in this study as a promising approach to design automated, more accurate and objective evaluation methods.

Item Type: Journal article
Publication Title: PLoS ONE
Creators: Keles, H.O., Cengiz, C., Demiral, I., Ozmen, M.M. and Omurtag, A.
Publisher: Public Library of Science (PLoS)
Date: 18 February 2021
Volume: 16
Number: 2
ISSN: 1932-6203
Rights: © 2021 Keles et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Divisions: Schools > School of Science and Technology
Record created by: Jeremy Silvester
Date Added: 11 Mar 2021 11:39
Last Modified: 31 May 2021 15:05
URI: https://irep.ntu.ac.uk/id/eprint/42490

Actions (login required)

Edit View Edit View


Views per month over past year


Downloads per month over past year