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Related Concept Videos

Computed Tomography01:10

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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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Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

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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 II: Positron Emission Tomography and Scintigraphy01:25

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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.
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Positron Emission Tomography01:29

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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.
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X-ray Imaging01:24

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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: Aug 25, 2025

Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization
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Dual-energy CT: Technical considerations and clinical applications.

G C Fernández-Pérez1, C Fraga Piñeiro2, M Oñate Miranda3

  • 1Servicio de Radiodiagnóstico, Hospital Universitario Río Hortega, Grupo Recoletas, Valladolid, Spain.

Radiologia
|October 15, 2022
PubMed
Summary

Dual-energy CT (DECT) offers significant clinical benefits, including iodine mapping for tumor characterization and perfusion assessment. Understanding its capabilities and limitations can improve its underused potential in medical imaging.

Keywords:
Computed tomographyDual energyEnergía dualImágenes monoenergéticasIodine mapMapa de yodoSin contraste virtualSingle-energy imagesTomografía computarizadaWithout virtual contrast

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Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
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Area of Science:

  • Radiology
  • Medical Imaging
  • Computed Tomography

Background:

  • Dual-energy CT (DECT), first described in 1973, is currently underutilized in clinical settings.
  • There is a need to highlight the clinical advantages and technical constraints of DECT.

Purpose of the Study:

  • To review the clinical benefits of DECT.
  • To discuss the technical limitations of DECT.
  • To promote a better understanding and wider adoption of DECT in clinical practice.

Main Methods:

  • Review of clinical applications and technical aspects of dual-energy CT.
  • Discussion of image post-processing techniques, including iodine mapping and material decomposition.
  • Analysis of DECT's utility in characterizing tumors, lung perfusion, pulmonary nodules, and treatment response.

Main Results:

  • DECT enables quantitative iodine mapping for improved tumor characterization, lung perfusion assessment, and evaluation of treatment response.
  • Virtual monoenergetic images and virtual non-contrast/non-calcium images can be generated.
  • Material decomposition allows for the separation of substances like uric acid, fat, and the elaboration of hepatic iron overload maps.

Conclusions:

  • DECT provides valuable quantitative data and versatile imaging options beyond conventional CT.
  • Enhanced understanding of DECT's benefits and limitations is crucial for expanding its clinical application.
  • Further integration of DECT into routine practice can improve diagnostic accuracy and patient management.