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Related Concept Videos

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.
Description of the Procedures
Computed Tomography (CT) scan:
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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...
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.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
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Related Experiment Video

Updated: May 27, 2026

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
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[Diagnostic imaging--CT, dynamic CT, and others].

Hajime Kurosawa1

  • 1Center for Environmental Conservation and Research Safety, Tohoku University.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|November 12, 2011
PubMed
Summary

Computed tomography (CT) quantifies emphysematous lung changes, correlating low attenuation areas with quality of life and diffusion capacity. Dynamic CT can visualize airway narrowing, aiding in understanding emphysema phenotypes.

Area of Science:

  • Pulmonary Medicine
  • Radiology
  • Medical Imaging

Background:

  • Computed tomography (CT) is a vital diagnostic tool in clinical imaging.
  • Emphysematous changes are quantifiable as low attenuation areas on CT.
  • These changes correlate with diffusion capacity, quality of life, and nutritional status.

Purpose of the Study:

  • To quantitatively analyze emphysematous changes using CT.
  • To explore the relationship between low attenuation areas, airway wall thickness, and clinical parameters.
  • To investigate the utility of dynamic CT in understanding emphysema phenotypes.

Main Methods:

  • Quantitative analysis of low attenuation areas on CT scans.
  • Co-analysis of airway wall thickness.

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  • Visualization of airway dynamics using dynamic CT techniques.

    • Main Results:

    • Low attenuation areas in emphysema correlate with diffusion capacity, quality of life, and nutritional states.
    • Correlation with forced expiratory volume in one second was less significant.
    • Dynamic airway narrowing is a characteristic feature observed in emphysematous lungs.

    Conclusions:

    • Quantitative CT analysis of emphysematous changes provides valuable clinical insights.
    • Combining low attenuation area and airway wall thickness analysis may help define emphysema phenotypes.
    • Dynamic CT is a promising tool for visualizing airway behavior in emphysema.