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Related Concept Videos

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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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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Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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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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Related Experiment Video

Updated: Aug 23, 2025

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
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High Temporal Resolution Dual-Source Photon-Counting CT for Coronary Artery Disease: Initial Multicenter Clinical

Martin Soschynski1, Florian Hagen2, Stefan Baumann3

  • 1Department of Diagnostic and Interventional Radiology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany.

Journal of Clinical Medicine
|October 27, 2022
PubMed
Summary

Spectral dual-source photon-counting detector coronary computed tomography angiography (PCD-CCTA) offers excellent diagnostic image quality for coronary artery disease, even with significant coronary calcifications. This advanced imaging technique provides high contrast-to-noise ratios and good assessability of coronary segments.

Keywords:
CTcardiaccoronaryphoton countingspectral imaging

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Area of Science:

  • Radiology
  • Cardiovascular Imaging
  • Medical Physics

Background:

  • Coronary artery disease (CAD) diagnosis relies heavily on imaging modalities.
  • Photon-counting detector (PCD) technology offers potential advancements in CT imaging.
  • Spectral imaging provides material differentiation capabilities.

Purpose of the Study:

  • To evaluate the diagnostic image quality of spectral dual-source photon-counting detector coronary computed tomography angiography (PCD-CCTA).
  • To assess the performance of PCD-CCTA in a multicenter setting for detecting coronary artery disease.

Main Methods:

  • A multicenter study analyzed 92 subjects undergoing PCD-CCTA.
  • Image quality (IQ), assessability, contrast-to-noise ratio (CNR), and Agatston scores were measured.
  • Comparison with invasive coronary angiography (ICA) was performed in a subgroup.

Main Results:

  • PCD-CCTA demonstrated very good IQ (1 [IQR 1–2]) and high CNR (20 ± 10).
  • Assessability was high, with only 5% of segments rated non-diagnostic, and better in proximal segments.
  • Diagnostic performance for CAD in the ICA subgroup showed high sensitivity (92%) and specificity (96%).
  • Image quality was maintained for Agatston scores up to 600 and influenced by heart rate in high-pitch mode.

Conclusions:

  • Spectral dual-source PCD-CCTA provides good diagnostic image quality for evaluating coronary artery disease.
  • The technique is effective for patients with low to moderate coronary calcifications.
  • Further validation with larger cohorts is needed for definitive conclusions on diagnostic performance compared to ICA.