Artificial intelligence for phase recognition in complex laparoscopic cholecystectomy

Tomer Golany, Amit Aides, Daniel Freedman, Nadav Rabani, Yun Liu, Ehud Rivlin, Greg S. Corrado, Yossi Matias, Wisam Khoury, Hanoch Kashtan, Petachia Reissman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Background: The potential role and benefits of AI in surgery has yet to be determined. This study is a first step in developing an AI system for minimizing adverse events and improving patient’s safety. We developed an Artificial Intelligence (AI) algorithm and evaluated its performance in recognizing surgical phases of laparoscopic cholecystectomy (LC) videos spanning a range of complexities. Methods: A set of 371 LC videos with various complexity levels and containing adverse events was collected from five hospitals. Two expert surgeons segmented each video into 10 phases including Calot’s triangle dissection and clipping and cutting. For each video, adverse events were also annotated when present (major bleeding; gallbladder perforation; major bile leakage; and incidental finding) and complexity level (on a scale of 1–5) was also recorded. The dataset was then split in an 80:20 ratio (294 and 77 videos), stratified by complexity, hospital, and adverse events to train and test the AI model, respectively. The AI-surgeon agreement was then compared to the agreement between surgeons. Results: The mean accuracy of the AI model for surgical phase recognition was 89% [95% CI 87.1%, 90.6%], comparable to the mean inter-annotator agreement of 90% [95% CI 89.4%, 90.5%]. The model’s accuracy was inversely associated with procedure complexity, decreasing from 92% (complexity level 1) to 88% (complexity level 3) to 81% (complexity level 5). Conclusion: The AI model successfully identified surgical phases in both simple and complex LC procedures. Further validation and system training is warranted to evaluate its potential applications such as to increase patient safety during surgery.

Original languageEnglish
Pages (from-to)9215-9223
Number of pages9
JournalSurgical Endoscopy and Other Interventional Techniques
Issue number12
StatePublished - Dec 2022


  • Artificial Intelligence
  • Cholecystectomy
  • Computer Vision


Dive into the research topics of 'Artificial intelligence for phase recognition in complex laparoscopic cholecystectomy'. Together they form a unique fingerprint.

Cite this