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CompletedNCT06612606Updated Sep 26, 2024

Transfer Learning of a Neural Network for Robotic Surgical Assessment

An observational study in Robot Surgery, sponsored by Aalborg University. Completed at 1 site in Denmark. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-09-26.

Sponsored by Aalborg University · Observational

Study type
Observational
Model
Cohort
Time perspective
Cross-sectional
Enrollment
5
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this observational study is to explore how pretrained artificial intelligence (AI) models, trained on preclinical data, can improve the accuracy of action recognition and skills assessment in robot-assisted surgery (RAS) in urological patients by the use of transfer learning. The main questions it aims to answer are:

  • Can pretrained AI models accurately assess action recognition and skills assessment in clinical surgeries?
  • How do different training approaches of transfer learning affect the performance of the AI models? A baseline model developed from scratch using clinical data will be compared to pretrained models that are (1) directly applied to clinical data (2) fine-tuned by training only some layers of the AI model, and (3) fully retrained to see if these approaches improve performance.

Participants who are robot surgeons will:

  • Undergo RAS procedures on patients, with no intervention, where video data will be collected for later action recognition and skills assessment.
  • Contribute to model training and evaluation through clinical dataset integration.
02

Conditions studied

  • Robot Surgery

Keywords

  • deep learning
  • transfer learning
  • robot surgery
  • surgical assessment
03

In context

Lead sponsor

Aalborg University is the lead sponsor of 178 studies on the registry; 37 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

The study population consisted of robot surgeons who where either experienced or novice (being specialized doctors undergoing surgical fellowship to become robot surgeons).

All procedures where robot-assisted procedures done on patients, who were admitted for treatment at the urological department. The patients also gave their consent regarding data collection. However, the real participant where the robot surgeons.

Eligibility criteria

Inclusion Criteria:

  • Robot surgeons who are experienced with more than 100 cases.
  • Robot surgical fellows with less than 100 cases.
  • Robot surgeons who worked at the urological department of Aalborg University Hospital.
05

Study design

Observational model
Cohort
Time perspective
Cross-sectional
Enrollment
5 participants (actual)
Patient registry
No

Groups and cohorts

  • Experienced robot surgeons

    Robot surgeons with 100 or more performed robot surgical cases.

    Other: observational study

  • Novice robot surgeons

    Robot surgeons with less than 100 performed robot surgical cases.

    Other: observational study

Interventions

  • Otherobservational study

    This was an observational study with no intervention.

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What researchers measure

Primary outcomes

  1. Accuracy of action recognition using clinical data from scratch

    Accuracy of the deep learning algorithm for action recognition, when training the model from scratch using clinical data from robot surgical procedures.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of action recognition.

  2. Accuracy of skills assessment using clinical data from scratch

    Accuracy of the deep learning algorithm for skills assessment, when training the model from scratch using clinical data from robot surgical procedures.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of action recognition.

  3. Accuracy of action recognition using the pretrained network directly on clinical data

    Accuracy of the pretrained deep learning algorithm for action recognition, when using the model directly on clinical data from robot surgical procedures.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of action recognition.

  4. Accuracy of skills assessment using the pretrained model directly on clinical data

    Accuracy of the pretrained deep learning algorithm for skills assessment, when using the model directly on clinical data from robot surgical procedures.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of skills assessment.

  5. K fold accuracies for action recognition and skills assessment for the complete retraining of the pretrained network.

    K fold cross-validation accuracies when retraining the complete pretrained model on the clinical data for both action recognition and skills assessment.

    Time frame: From the start to the end of the clinical procedures.

  6. K fold accuracies for action recognition and skills assessment for the partial retraining of the pretrained network.

    K fold cross validation accuracies for action recognition and skills assessment for the retraining of the LSTM and dense layers of the pretrained network using clinical data.

    Time frame: From the start to the end of the clinical procedures.

Secondary outcomes

  1. Weighted recall/sensitivity, precision and F1 score for action recognition of the clinical network trained from scratch

    Based on the performance of action recognition from the clinical network trained from scratch.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of action recognition.

  2. Weighted recall/sensitivity, precision and F1 score for Skills Assessment of the clinical network trained from scratch

    Based on the performance of skills assessment from the clinical network trained from scratch.

    Time frame: From start to end of a the robot surgical procedure that is being assessed in terms of skills assessment..

  3. Predictive certainty of the action recognition and skills assessment of the network trained from scratch on the clinical data.

    Predictive certainty with overall mean, minimum and maximum and depicted in probability plots for action recognition and skills assessment of the network trained from scratch on clinical data.

    Time frame: From the start to the end of the clinical procedures.

  4. Predictive certainty of the action recognition and skills assessment of the network partially retrained network.

    Predictive certainty with overall mean, minimum and maximum and depicted in probability plots for action recognition and skills assessment of the partially retrained network, where only the LSTM and deep layers of the network was trained on clinical data.

    Time frame: From the start to the end of the clinical procedures.

07

Study locations

1 site
  • Department of urology, Aalborg University Hospital
    Aalborg, North Jutland 9000, Denmark
08

References and documents

Individual participant data

Plan to share: Yes — The IPD will be shared as anonymous and GDPR secure data on an open access website. The data will be shared as the anonymized footage of the surgical procedures that the participants made.

Supporting information: Study protocol, Analytic code

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 26, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06612606
Lead sponsor
Aalborg University
Responsible party
Nasseh Hashemi (Principal investigator, Aalborg University) — Principal investigator
First posted
Sep 25, 2024
Start date
May 22, 2023
Primary completion
May 26, 2023
Completion
May 26, 2023
Last update
Sep 26, 2024

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Sep 2024. You cannot join it, but the record below documents what was studied.

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