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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...
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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.
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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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...
Imaging Studies III: Computed Tomography01:27

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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Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...

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Coronary angiography with dual source computed tomography: initial experience.

Zhu-hua Zhang1, Zheng-yu Jin, Shu-yang Zhang

  • 1Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing.

Chinese Medical Sciences Journal = Chung-Kuo I Hsueh K'O Hsueh Tsa Chih
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PubMed
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Dual-source CT coronary angiography achieves excellent image quality without oral metoprolol preparation. This technique effectively visualizes coronary segments, regardless of patient heart rate, simplifying the procedure.

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Area of Science:

  • Cardiovascular imaging
  • Radiology
  • Computed Tomography

Background:

  • Coronary angiography is crucial for diagnosing coronary artery disease.
  • Oral beta-blockers are often used to control heart rate during CT angiography, but can cause side effects.
  • Alternative methods for achieving adequate image quality are needed.

Purpose of the Study:

  • To evaluate the scan technique and image quality of dual-source CT coronary angiography performed without oral metoprolol preparation.
  • To determine if heart rate significantly impacts image quality in this setting.

Main Methods:

  • Prospective study of 600 patients undergoing dual-source CT coronary angiography.
  • Inclusion of plain scans for calcium scoring and enhanced scans for angiography.
  • Utilized multi-planar reconstruction (MPR), maximum intensity projection (MIP), and volume rendering technique (VRT) for image analysis.
  • Image quality assessed using a 1-4 point scale for 8,457 coronary segments.

Main Results:

  • The average heart rate during enhanced scans was 82.1 bpm.
  • 97.2% of evaluated coronary segments were rated as excellent quality (point 1).
  • Heart rate was not identified as a major source of artifact, with good visualization achieved using single or multi-phase reconstruction.

Conclusions:

  • Dual-source CT coronary angiography provides excellent image quality without the need for oral metoprolol preparation.
  • The technique is effective across a range of heart rates, minimizing artifacts.
  • This approach simplifies the pre-procedural workflow and patient management.