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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 III: X-Ray01:20

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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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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 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 I:Echocardiography01:17

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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
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Photon-Counting CT in Cardiovascular Imaging: Clinical Applications.

Prabhakar Shantha Rajiah1, James M Williams2,3, Michael LaVere2

  • 1Department of Radiology, Mayo Clinic, Rochester, MN, USA. Rajiah.Prabhakar@mayo.edu.

Korean Journal of Radiology
|February 24, 2026
PubMed
Summary
This summary is machine-generated.

Photon-counting CT (PCCT) offers advanced cardiovascular imaging with ultra-high resolution and improved multi-energy capabilities. This technology enhances visualization of small vessels and lesions while improving iodine contrast and radiation dose efficiency.

Keywords:
CTCardiac imagingPhoton-counting CTPlaqueStent

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biomedical Engineering

Background:

  • Photon-counting CT (PCCT) directly converts X-ray photons to electrical signals using semiconductor detectors.
  • PCCT technology presents significant advantages over conventional CT in cardiovascular imaging applications.

Purpose of the Study:

  • To review the technology of photon-counting CT (PCCT).
  • To highlight the benefits of PCCT in cardiovascular imaging with case examples.
  • To discuss the challenges associated with PCCT implementation.

Main Methods:

  • Review of PCCT technology principles.
  • Presentation of case examples demonstrating PCCT benefits in cardiovascular imaging.
  • Discussion of current challenges and future directions for PCCT.

Main Results:

  • PCCT provides ultra-high-resolution (UHR) imaging for detailed assessment of small vessels, calcifications, and stents.
  • Improved multi-energy capabilities enhance iodine signal, reduce artifacts, and enable material separation for lesion characterization.
  • PCCT demonstrates improved iodine signal and radiation dose efficiencies compared to conventional CT.

Conclusions:

  • Photon-counting CT (PCCT) significantly advances cardiovascular imaging through enhanced resolution and spectral information.
  • The technology offers superior visualization of cardiac structures and pathologies.
  • Further development and clinical integration of PCCT promise improved patient outcomes in cardiovascular diagnostics.