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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 IV: CMRI01:21

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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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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 for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

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Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
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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.
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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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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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MR Angiography: Contrast-Enhanced Acquisition Techniques.

Prashant Nagpal1, Thomas M Grist2

  • 1Cardiovascular Imaging, Department of Radiology, University of Wisconsin-Madison, School of Medicine and Public Health, 600 Highland Avenue, Madison, WI 53705, USA.

Magnetic Resonance Imaging Clinics of North America
|July 6, 2023
PubMed
Summary
This summary is machine-generated.

Contrast-enhanced MR angiography (CE-MRA) offers a safe alternative to CT angiography for evaluating cardiovascular structures. This technique uses gadolinium contrast, avoiding nephrotoxic agents and radiation exposure, making it ideal for vascular assessment.

Keywords:
3D MR angiographyBright-blood MRAContrast-enhanced MR angiographyGadoliniumMR angiographyPeripheral arteryRenal arteryTechniqueTime-resolved MRA

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Area of Science:

  • Radiology and Medical Imaging
  • Cardiovascular Imaging

Background:

  • Contrast-enhanced MR angiography (CE-MRA) is a widely adopted magnetic resonance imaging technique.
  • It is frequently utilized for the comprehensive evaluation of cardiovascular structures.
  • CE-MRA shares similarities with contrast-enhanced computed tomography (CT) angiography but employs gadolinium-based contrast agents.

Purpose of the Study:

  • To review the physical principles, limitations, and technical applications of CE-MRA.
  • To highlight CE-MRA as a valuable alternative to CT angiography for vascular assessment.
  • To emphasize the advantages of CE-MRA, including the avoidance of nephrotoxic contrast agents and ionizing radiation.

Main Methods:

  • Review of existing literature on CE-MRA techniques.
  • Discussion of the underlying physical principles governing contrast enhancement and image acquisition in CE-MRA.
  • Analysis of the technical factors differentiating CE-MRA from CT angiography.

Main Results:

  • CE-MRA provides detailed visualization of cardiovascular structures.
  • The technique offers an alternative to CT angiography without the risks of nephrotoxic contrast or radiation.
  • Understanding the technical factors is crucial for optimal CE-MRA performance.

Conclusions:

  • CE-MRA is an effective and safer imaging modality for vascular evaluation compared to CT angiography.
  • The review provides insights into the principles, limitations, and applications of CE-MRA.
  • Further understanding and application of CE-MRA techniques can enhance cardiovascular diagnostics.