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Related Concept Videos

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 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

Imaging Studies for Cardiovascular System III: X-Ray

229
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...
229
Positron Emission Tomography01:29

Positron Emission Tomography

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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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...
34
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

53
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: Aug 9, 2025

High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
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Photon-Counting Computed Tomography (PCCT): Technical Background and Cardio-Vascular Applications.

Antonella Meloni1,2, Francesca Frijia1,2, Daniele Panetta3

  • 1Department of Radiology, Fondazione G. Monasterio CNR-Regione Toscana, 56124 Pisa, Italy.

Diagnostics (Basel, Switzerland)
|February 25, 2023
PubMed
Summary

Photon-counting computed tomography (PCCT) offers advanced imaging with improved resolution and reduced radiation. This technology enhances vascular imaging by providing multi-energy data and better quantitative analysis.

Keywords:
CT angiographycardiac CTphoton-counting CTphoton-counting detectors

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biomedical Engineering

Background:

  • Conventional computed tomography (CT) has limitations in resolution and radiation dose.
  • Photon-counting detectors represent a significant advancement over conventional CT technology.

Purpose of the Study:

  • To review the technical principles and benefits of photon-counting CT (PCCT).
  • To outline the current literature on PCCT applications in vascular imaging.

Main Methods:

  • This narrative review synthesizes information on PCCT technology.
  • Literature search focused on PCCT principles, advantages, and vascular imaging applications.

Main Results:

  • PCCT provides superior spatial and contrast resolution compared to conventional CT.
  • PCCT reduces image noise and artifacts, lowers radiation exposure, and enables multi-energy imaging.
  • The technology facilitates improved quantitative imaging and use of diverse contrast agents.

Conclusions:

  • Photon-counting CT is poised to transform clinical CT imaging.
  • PCCT offers significant advantages for vascular imaging, including enhanced diagnostic capabilities.