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

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
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Computed Tomography01:10

Computed Tomography

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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Computed Tomography (CT) scan:
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Related Experiment Video

Updated: Jun 1, 2026

Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging
07:15

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Published on: July 11, 2025

A simple image processing approach for electronic cleansing in computed tomographic colonography.

S Yamamoto, G Iinuma, M Suzuki

    Biomedical Imaging and Intervention Journal
    |May 26, 2011
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new filtering technique to improve electronic cleansing in CT colonography for colorectal neoplasia screening. The method accurately removes artifacts, enhancing visualization of the colon wall for better cancer detection.

    Keywords:
    CT colonographyElectronic cleansing

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    Area of Science:

    • Medical Imaging
    • Gastroenterology
    • Computational Imaging

    Background:

    • Colorectal neoplasia screening demands advanced imaging techniques like Computed Tomographic Colonography (CTC).
    • Electronic Cleansing (EC) is used in CTC to virtually remove fecal material using oral contrast agents.
    • Partial volume effects from air lumens can distort tagged regions during EC, hindering accurate analysis.

    Observation:

    • Air lumens in CT images cause distortions and partial volume effects during electronic cleansing.
    • A novel technique combines electronic cleansing algorithms with a vertical motion filter.
    • This filter neutralizes artifacts caused by air lumens at the fluid level.

    Findings:

    • The new technique effectively eliminates artifacts caused by air lumens.
    • It accurately maintains normal intra-colonic structure during virtual cleansing.
    • The method successfully supports digital cleaning of tagged residual material on the colon wall.

    Implications:

    • Improved accuracy in colorectal cancer screening through enhanced CTC image quality.
    • Potential for more reliable detection of colorectal neoplasia.
    • Advancement in virtual colonoscopy techniques for non-invasive diagnosis.