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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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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.
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...
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Imaging Studies III: Computed Tomography01:27

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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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Positron Emission Tomography01:29

Positron Emission Tomography

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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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...
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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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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.
Fundamental Principles of PET
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X-ray Imaging01:24

X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Related Experiment Video

Updated: Nov 2, 2025

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
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Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

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[Dual-energy CT].

Jack Junchi Xu1, Kristoffer Lindskov Hansen, Lars Lönn

  • 1jack.junchi.xu@regionh.dk.

Ugeskrift for Laeger
|June 14, 2021
PubMed
Summary

Dual-energy CT (DECT) uses varying X-ray energies to differentiate materials, aiding diagnosis. This review explores its clinical applications and challenges in Danish hospitals.

Area of Science:

  • Medical Imaging
  • Radiology
  • Computed Tomography

Background:

  • Dual-energy CT (DECT) is an advanced imaging technique increasingly adopted in Danish hospitals.
  • DECT leverages data from high and low kV photon beams.
  • This enables material separation based on atomic composition, allowing visualization and quantification.

Purpose of the Study:

  • To review the broad clinical applications of DECT across multiple organ systems.
  • To highlight DECT's potential to support diagnostic decision-making.
  • To address the current underutilization of DECT.

Main Methods:

  • Review of existing literature and clinical data on DECT applications.
  • Analysis of DECT's technical principles, including material separation.

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  • Discussion of workflow and knowledge barriers impacting DECT adoption.

    • Main Results:

    • DECT offers diverse applications in various medical specialties.
    • The technique provides valuable quantitative and qualitative diagnostic information.
    • Limited radiologist knowledge and workflow integration hinder widespread DECT use.

    Conclusions:

    • DECT is a powerful tool with significant potential to enhance diagnostic accuracy.
    • Overcoming knowledge gaps and workflow challenges is crucial for broader DECT implementation.
    • Further education and streamlined protocols will facilitate DECT's integration into routine clinical practice.