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Related Concept Videos

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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Related Experiment Video

Updated: Sep 23, 2025

Murine Endoscopy for In Vivo Multimodal Imaging of Carcinogenesis and Assessment of Intestinal Wound Healing and Inflammation
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Deconstructing mastery in colorectal fluorescence angiography interpretation.

Jeffrey Dalli1, Sarah Shanahan1, Niall P Hardy1

  • 1UCD Centre for Precision Surgery, School of Medicine, Catherine McAuley Centre, University College Dublin, 21 Nelson St, Phibsborough, Dublin 7, D07 KX5K, Ireland.

Surgical Endoscopy
|May 11, 2022
PubMed
Summary
This summary is machine-generated.

Expert surgeons show high agreement in interpreting indocyanine green fluorescence angiography (ICGFA) signals during colorectal surgery, even if their understanding is often unconscious. Computational analysis can help standardize ICGFA training and interpretation.

Keywords:
AngiographyDigitalFluorescenceIndocyanine greenQuantitative

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Area of Science:

  • Surgical Innovation
  • Medical Imaging Analysis
  • Colorectal Surgery

Background:

  • Indocyanine green fluorescence angiography (ICGFA) is vital in colorectal surgery but lacks standardized pre-training.
  • Inconsistent signal interpretation exists between novice and expert surgeons.
  • Expert annotation of ICGFA videos is crucial for understanding technique mastery.

Purpose of the Study:

  • Deconstruct expert-annotated ICGFA video signal patterns.
  • Analyze the correlation of these patterns with surgical outcomes.
  • Determine if expert interpretative capability is conscious or unconscious.

Main Methods:

  • Quantitative analysis of 24 expert-annotated ICGFA videos using an intensity tracker.
  • Examination of fluorescence signal time plots for key metrics (Fmax, Tmax, T1/2max, T1/2/Tmax).
  • Qualitative analysis of structured interviews with 6 expert surgeons.

Main Results:

  • Excellent inter-observer correlation (ICC 0.9-1.0) for Fmax, Tmax, and T1/2max.
  • Moderate correlation (ICC 0.729) for the T1/2/Tmax ratio.
  • Experts described deliberate viewing strategies, but their dynamic signal appreciation varied.

Conclusions:

  • Expert ICGFA interpretation shows high mathematical correlation but is often tacit.
  • Computational quantification of expert behavior can inform training and technology development.
  • Developing a standardized lexicon and computer vision tools can enhance ICGFA utilization.