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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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Dose optimization in cardiac CT.

Sandeep Hedgire1, Brian Ghoshhajra1, Mannudeep Kalra1

  • 1Division of Cardiovascular Imaging, Massachusetts General Hospital - Harvard Medical School, 55 Fruit St., Boston, MA 02114, United States.

Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
|May 17, 2017
PubMed
Summary
This summary is machine-generated.

Advances in cardiac CT technology improve diagnostic capabilities for various heart conditions. Understanding scanner and patient factors is key to optimizing radiation dose while maintaining image quality, adhering to the ALARA principle.

Keywords:
Cardiac CTCoronary CTADose reductionRadiation dose

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Area of Science:

  • Cardiovascular Imaging
  • Radiology
  • Medical Physics

Background:

  • Cardiac CT technology is rapidly advancing, expanding its clinical applications in diagnosing coronary artery disease, congenital heart disease, and pre-procedural assessments.
  • Cardiovascular imagers must balance high diagnostic image quality with minimized radiation exposure.
  • Radiation dose in CT is influenced by numerous scanner and patient-specific variables.

Purpose of the Study:

  • To review the factors influencing radiation dose in cardiac CT.
  • To present strategies for optimizing radiation dose in cardiac CT examinations.
  • To emphasize the importance of the ALARA (As Low As Reasonably Achievable) principle in cardiac CT imaging.

Main Methods:

  • Review of scientific literature on cardiac CT technology and radiation dose.
  • Analysis of scanner-related factors affecting radiation dose (e.g., kVp, mAs, pitch, collimation).
  • Discussion of patient-related factors influencing radiation dose (e.g., body habitus, heart rate).

Main Results:

  • Identified key technical parameters and patient characteristics that significantly impact radiation dose.
  • Outlined practical strategies for dose reduction without compromising diagnostic image quality.
  • Highlighted the role of iterative reconstruction techniques and advanced imaging protocols.

Conclusions:

  • Optimizing radiation dose in cardiac CT is achievable through a comprehensive understanding of influencing factors.
  • Implementing evidence-based strategies ensures patient safety and adherence to radiation protection principles.
  • Continued technological advancements and protocol optimization are crucial for the future of cardiac CT.