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Imaging Studies for Cardiovascular System V: CT

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...

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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...

Imaging Studies for Cardiovascular System III: X-Ray

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...

Computed Tomography

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 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,...

Imaging Studies III: Computed Tomography

Imaging Studies III: Computed Tomography

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...

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High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals

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Low-dose cardiovascular computed tomography: where are the limits?

Paul Schoenhagen¹, Carla M Thompson, Sandra S Halliburton

¹Cleveland Clinic, Imaging Institute and Heart & Vascular Institute, Cleveland, OH, USA. schoenp1@ccf.org

Current Cardiology Reports

|November 8, 2011

Summary

Computed tomography (CT) imaging is vital for cardiovascular conditions but increases radiation exposure. Recent technological advances offer dose-saving strategies to mitigate cancer risks associated with CT scans.

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Area of Science:

Radiology
Cardiovascular Imaging
Medical Physics

Background:

Diagnostic computed tomography (CT) imaging has become a cornerstone in evaluating cardiovascular conditions since the 1970s.
While improving patient care, the widespread use of CT has significantly increased population-based radiation exposure.
Concerns regarding potential long-term cancer risks from this increased exposure are well-justified.

Purpose of the Study:

To review the evolution of CT scanner technologies in cardiovascular imaging.
To highlight the development and impact of dose-saving strategies.
To emphasize the importance of responsible CT utilization and advanced techniques.

Main Methods:

Review of historical technological developments in CT scanners for cardiovascular applications.
Analysis of the impact of new technologies on image quality versus radiation dose.
Examination of emerging dose-reduction protocols and their effectiveness.

Main Results:

Early CT scanner development prioritized image quality over radiation dose reduction.
Recent technological advancements have led to significant reductions in radiation exposure for cardiovascular CT.
Dose-saving protocols have demonstrated impressive efficacy in lowering radiation levels.

Conclusions:

Responsible, evidence-based use of CT for cardiovascular imaging is crucial.
Leveraging available and emerging dose-saving strategies is essential for minimizing population-based radiation exposure.
Balancing diagnostic accuracy with radiation safety remains a key challenge in modern cardiovascular CT.