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Related Concept Videos

Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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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.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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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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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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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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Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Basic Principles of CT and MR Imaging.

Abeer AlHadidi1, J Colin LaPrade2, Andy Wai Kan Yeung3

  • 1Department of Oral and Maxillofacial Pathology, Radiology and Medicine, New York University College of Dentistry, 345 East 24th Street, 827S, New York, NY 10010, USA.

Oral and Maxillofacial Surgery Clinics of North America
|October 17, 2025
PubMed
Summary
This summary is machine-generated.

Computed tomography (CT) and magnetic resonance imaging (MRI) are vital 3D imaging tools in healthcare. This review details their distinct physics, acquisition methods, and clinical applications.

Keywords:
3-Dimensional imagingComputed tomographyMRI

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Area of Science:

  • Medical Imaging Physics
  • Radiology and Biomedical Imaging

Background:

  • Three-dimensional imaging is crucial for modern healthcare, aiding diagnosis and treatment planning.
  • Computed tomography (CT) and magnetic resonance imaging (MRI) are leading modalities for detailed anatomical visualization.

Purpose of the Study:

  • To review the fundamental physics and image acquisition techniques of CT and MRI.
  • To compare technological advancements, advantages, and limitations of these key imaging modalities.

Main Methods:

  • Exploration of the underlying physical principles governing CT and MRI.
  • Analysis of image acquisition strategies employed by both technologies.
  • Review of historical and recent technological developments.

Main Results:

  • CT utilizes X-ray attenuation principles for image reconstruction.
  • MRI relies on nuclear magnetic resonance phenomena.
  • Both methods offer unique strengths and weaknesses in clinical utility.

Conclusions:

  • Understanding the distinct physics of CT and MRI is essential for optimal clinical use.
  • Technological progress continues to enhance the capabilities of both imaging modalities.