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Related Concept Videos

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
96
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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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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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 VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Related Experiment Video

Updated: Oct 16, 2025

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
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Validation of a multimodal algorithm for diagnosing giant cell arteritis with imaging.

Augustin Lecler1, Rabih Hage2, Frédérique Charbonneau1

  • 1Department of Radiology, Rothschild Hospital Foundation, 75019 Paris, France.

Diagnostic and Interventional Imaging
|October 19, 2021
PubMed
Summary

Magnetic resonance imaging (MRI) combined with ultrasound or retinal angiography (RA) offers the best diagnostic performance for non-invasive giant cell arteritis (GCA) diagnosis. This imaging strategy is recommended for clinical practice.

Keywords:
Fluorescein angiographyGiant cell arteritisImagingMagnetic resonance imagingUltrasound

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Area of Science:

  • Vascular Medicine
  • Diagnostic Imaging
  • Rheumatology

Background:

  • Giant cell arteritis (GCA) is a systemic vasculitis affecting large arteries, primarily the aorta and its branches.
  • Accurate and timely diagnosis of GCA is crucial to prevent irreversible complications such as vision loss.
  • Non-invasive diagnostic methods are preferred to avoid the risks associated with temporal artery biopsy (TAB).

Purpose of the Study:

  • To determine the optimal combination of imaging modalities for the non-invasive diagnosis of GCA.
  • To evaluate the diagnostic performance of individual and combined imaging techniques.

Main Methods:

  • Prospective single-center study involving participants with suspected GCA.
  • Utilized high-resolution 3T MRI, temporal and extra-cranial arteries ultrasound, and retinal angiography (RA).
  • Compared diagnostic accuracy of each modality alone and in combination, using McNemar test for algorithm construction.

Main Results:

  • The combination of MRI followed by ultrasound or RA achieved 100% sensitivity and accuracy.
  • Individual modalities showed varying sensitivities and specificities: MRI (100% sensitivity, 86% specificity), ultrasound (88% sensitivity, 84% specificity), and RA (94% sensitivity, 74% specificity).
  • Combined imaging strategies demonstrated high sensitivity (95-100%) and specificity (67-100%).

Conclusions:

  • An imaging algorithm starting with MRI, followed by ultrasound or RA, provides excellent diagnostic performance for GCA.
  • This combined imaging approach is recommended for routine clinical use in diagnosing GCA.
  • Non-invasive imaging modalities can effectively diagnose GCA, potentially reducing the need for invasive procedures like TAB.