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Related Concept Videos

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

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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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.
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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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Related Experiment Video

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Electromagnetic Navigation Transthoracic Nodule Localization for Minimally Invasive Thoracic Surgery
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A probe-based electromagnetic navigation system to integrate computed tomography during upper gastrointestinal

Michael Kranzfelder1, Dirk Wilhelm1, Manos Doundoulakis2

  • 1Department of Surgery, Klinikum rechts der Isar, Technische Universität München, München, Germany.

Endoscopy
|November 21, 2013
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Summary

A new electromagnetic navigation system integrates computed tomography (CT) scans into upper gastrointestinal endoscopy. This probe-based system accurately guides surgeons, achieving a target registration error (TRE) under 5mm for improved preoperative work-up.

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Area of Science:

  • Medical Devices
  • Gastroenterology
  • Surgical Navigation

Background:

  • Preoperative work-up for gastrointestinal procedures requires advanced visualization tools.
  • Integrating diagnostic imaging directly into endoscopy is a significant challenge.

Purpose of the Study:

  • To develop and evaluate a probe-based electromagnetic navigation system for integrating computed tomography (CT) data into upper gastrointestinal endoscopy.
  • To assess the accuracy of this system for preoperative visualization of lesions.

Main Methods:

  • A probe-based electromagnetic navigation system was developed for use with endoscopes.
  • The system was evaluated experimentally and in 24 patients with upper gastrointestinal cancer.
  • Target Registration Error (TRE) was measured by comparing the navigation probe's position to the CT-identified lesion.

Main Results:

  • Experimental evaluations showed median TREs of 2.8mm (coronal), 2.2mm (transverse), and 2.8mm (sagittal).
  • Clinical evaluations in patients yielded median TREs of 4.8mm (coronal), 3.9mm (transverse), and 4.2mm (sagittal).
  • No complications were reported during navigated endoscopy procedures.

Conclusions:

  • The probe-based electromagnetic navigation system demonstrated high accuracy with TRE consistently below 5mm.
  • This system facilitates enhanced interpretation of endoluminal imaging during preoperative work-up.