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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.
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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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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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Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
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Mechanical valve evaluation with four-dimensional computed tomography.

Satoshi Numata1, Yasushi Tsutsumi2, Osamu Monta2

  • 1Department of Cardiovascular Surgery, Fukui Cardiovascular Center, Fukui, Japan. snumat@yahoo.co.jp

The Journal of Heart Valve Disease
|March 7, 2014
PubMed
Summary
This summary is machine-generated.

Four-dimensional computed tomography (4D-CT) shows promise for evaluating mechanical heart valves, particularly bileaflet types. However, visualization of monoleaflet valves remains limited due to imaging artifacts.

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Area of Science:

  • Cardiovascular Imaging
  • Medical Diagnostics
  • Radiology

Background:

  • Echocardiography and cinefluoroscopy are standard for assessing mechanical heart valves.
  • Multidetector computed tomography (MDCT) with four-dimensional (4D)-CT offers advanced imaging capabilities.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of 4D-CT for functional and morphological assessment of implanted mechanical heart valves.
  • To compare the effectiveness of 4D-CT in evaluating different types of mechanical valves.

Main Methods:

  • 37 patients with 45 mechanical valves underwent electrocardiogram-gated MDCT (16- or 256-row).
  • 4D-CT cine mode was used to visualize valve leaflet motion.
  • Leaflet and artifact visualization quality were scored.

Main Results:

  • 4D-CT successfully visualized leaflet motion in all bileaflet valves.
  • Visualization was limited in four of nine monoleaflet valves due to leaflet radio-opacity.
  • Two cases of stuck mechanical leaflets requiring surgery were identified.

Conclusions:

  • 4D-CT is a promising tool for functional and morphological evaluation of bileaflet mechanical valves.
  • The evaluation of monoleaflet valves using 4D-CT is currently limited.