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Related Concept Videos

Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

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Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers,...
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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.
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Endoscopic Procedures II: Colonoscopy01:25

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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

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An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
During an EGD, the endoscope can be used to:
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Related Experiment Video

Updated: May 1, 2026

Automated Measurement of Cryptococcal Species Polysaccharide Capsule and Cell Body
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Automated polyp detection in colon capsule endoscopy.

Alexander V Mamonov, Isabel N Figueiredo, Pedro N Figueiredo

    IEEE Transactions on Medical Imaging
    |April 9, 2014
    PubMed
    Summary

    This study introduces an automated algorithm for detecting colorectal polyps in colon capsule endoscopy videos. The algorithm aids human review by classifying frames, improving efficiency in colon cancer screening.

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    Area of Science:

    • Medical Imaging
    • Gastroenterology
    • Computational Biology

    Background:

    • Colorectal polyps are precursors to colon cancer, necessitating effective screening methods.
    • Colon capsule endoscopy (CCE) offers a minimally invasive approach to visualize the intestine.
    • Manual analysis of CCE videos for polyp detection is labor-intensive.

    Purpose of the Study:

    • To develop and evaluate an automated algorithm for polyp detection in CCE videos.
    • To reduce the workload of human operators analyzing CCE data.
    • To improve the efficiency and accuracy of polyp identification during endoscopic examinations.

    Main Methods:

    • Development of a binary classification algorithm analyzing frame geometry and texture.
    • Utilizing a 'best fit ball radius' as a decision parameter, assuming polyps are round protrusions.
    • Statistical performance evaluation on a dataset of over 18,900 frames from five patients.

    Main Results:

    • The algorithm achieved 47% sensitivity per frame and 81% sensitivity per polyp at 90% specificity.
    • For an average video length of 3747 frames, only 367 false positive frames required manual inspection.
    • Demonstrated potential to significantly decrease the manual review time for CCE videos.

    Conclusions:

    • The proposed algorithm effectively assists in identifying colorectal polyps from CCE video sequences.
    • Automated analysis can streamline the screening process for colon cancer precursors.
    • This technology holds promise for enhancing the diagnostic yield and efficiency of capsule endoscopy.