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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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...
Computed Tomography01:10

Computed Tomography

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

Imaging Studies for Cardiovascular System III: X-Ray

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...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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: Jun 1, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Established and emerging dose reduction methods in cardiac computed tomography.

Gary R Small1, Mustapha Kazmi, Robert A Dekemp

  • 1Division of Cardiology, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada.

Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology
|June 2, 2011
PubMed
Summary

Cardiac computed tomography (CT) reduces radiation exposure risks for patients undergoing coronary artery disease investigation. Understanding radiation reduction techniques ensures safe, accurate diagnostic imaging.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Oncology

Background:

  • Cardiac computed tomography (CT) is a common non-invasive tool for diagnosing coronary artery disease.
  • Concerns exist regarding malignancy risks from ionizing radiation in CT scans.
  • Minimizing patient radiation exposure while maintaining diagnostic accuracy is a priority.

Purpose of the Study:

  • To review established and emerging techniques for reducing patient radiation doses in cardiac CT.
  • To enable clinicians to adhere to the 'as low as reasonably achievable' (ALARA) principle.

Main Methods:

  • Review of radiation reduction strategies in cardiac CT.
  • Discussion of techniques modifying x-ray tube output, scan duration, scan length, and shielding.

Main Results:

  • Established and emerging techniques can significantly reduce patient radiation exposure from cardiac CT.
  • Modifications in imaging parameters and shielding are key to dose reduction.

Conclusions:

  • Implementing radiation reduction techniques in cardiac CT is crucial for patient safety.
  • Adherence to the ALARA principle ensures effective risk management in diagnostic imaging.