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Related Concept Videos

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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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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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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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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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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...
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Imaging Studies I: CT and MRI01:14

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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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Dual-Energy Computed Tomography: Technological Considerations.

Ryan Chung1, Bari Dane2, Benjamin M Yeh3

  • 1Department of Radiology, Massachusetts General Hospital, 55 Fruit Street, White 270, Boston, MA 02114, USA.

Radiologic Clinics of North America
|September 27, 2023
PubMed
Summary
This summary is machine-generated.

Dual-energy CT (DECT) offers superior tissue characterization compared to single-energy CT (SECT). Implementing DECT workflows enhances diagnostic capabilities and can reduce radiation and contrast dose.

Keywords:
DECTDual-energy CTImage reconstructionMulti-energy CTSpectral CTTechnological considerations

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Area of Science:

  • Radiology
  • Medical Imaging
  • Computed Tomography

Background:

  • Conventional single-energy CT (SECT) has limitations in detailed tissue characterization.
  • Dual-energy CT (DECT) acquisition methods differ between vendors (source-based vs. detector-based).

Purpose of the Study:

  • To outline the utility and implementation of dual-energy CT (DECT) in clinical practice.
  • To compare the advantages of DECT over SECT for tissue characterization and workflow optimization.

Main Methods:

  • DECT image generation involves reconstruction in projection or image domains.
  • Key DECT image types include SECT-equivalent, virtual monoenergetic, material density (iodine maps), and virtual non-contrast images.

Main Results:

  • DECT provides enhanced tissue characterization beyond SECT capabilities.
  • DECT facilitates characterization of incidental findings and allows for dose reduction strategies.
  • Optimal DECT workflow implementation requires radiologist and technologist input, focusing on patient and protocol selection.

Conclusions:

  • DECT offers significant advantages over SECT, including improved tissue differentiation and potential for reduced radiation and contrast agent administration.
  • Successful clinical integration of DECT relies on careful workflow design and automation.