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Related Concept Videos

Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

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, unexplained...
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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:
Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

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:
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...
Endoscopic Studies I: Bronchoscopy and Thoracoscopy01:30

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Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
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Related Experiment Video

Updated: Jul 1, 2026

Multimodal Imaging and Spectroscopy Fiber-bundle Microendoscopy Platform for Non-invasive, In Vivo Tissue Analysis
10:35

Multimodal Imaging and Spectroscopy Fiber-bundle Microendoscopy Platform for Non-invasive, In Vivo Tissue Analysis

Published on: October 17, 2016

Doppler imaging using spectrally-encoded endoscopy.

Dvir Yelin1, B E Bouma, J J Rosowsky

  • 1Department of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel. yelin@bm.technion.ac.il

Optics Express
|September 17, 2008
PubMed
Summary
This summary is machine-generated.

Spectrally encoded endoscopy (SEE) can now measure tissue motion, like blood flow, by detecting Doppler shifts. This advancement enables new applications for endoscopic imaging in medicine.

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Area of Science:

  • Medical Imaging
  • Optical Engineering
  • Biomedical Optics

Background:

  • Endoscopic imaging is crucial for medical diagnostics.
  • Current endoscopic techniques have limitations in visualizing dynamic tissue processes like blood flow.
  • Spectrally encoded endoscopy (SEE) offers high-resolution endoscopic imaging through small probes.

Purpose of the Study:

  • To enhance Spectrally encoded endoscopy (SEE) capabilities for imaging tissue motion.
  • To integrate Doppler shift measurement into SEE for dynamic physiological assessments.
  • To demonstrate the feasibility of Doppler-SEE in relevant phantoms and biological samples.

Main Methods:

  • Utilized spectral-domain interferometry within the SEE framework.
  • Measured relative spectral phases to detect Doppler shifts indicative of motion.
  • Employed a single optical fiber and miniature diffractive optics for probe design.
  • Validated the technique using flowing Intralipid phantoms and vibrating biological samples.

Main Results:

  • Successfully demonstrated the measurement of Doppler shifts using SEE.
  • Visualized blood flow dynamics in Intralipid phantoms.
  • Quantified motion in vibrating middle ear ossicles.
  • Achieved 3D volume imaging at video rates with added Doppler capability.

Conclusions:

  • Doppler-SEE expands the functionality of SEE, enabling quantitative assessment of tissue motion.
  • This technology holds significant potential for minimally invasive medical diagnostics and research.
  • Further development could lead to advanced endoscopic tools for various clinical applications.