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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.
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...
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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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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Updated: Mar 24, 2026

High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT
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High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT

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Computed tomography: What and how does it measure?

Michalis Mazonakis1, John Damilakis1

  • 1Department of Medical Physics, Faculty of Medicine, University of Crete, P.O. Box 2208, 71003 Iraklion, Crete, Greece.

European Journal of Radiology
|March 21, 2016
PubMed
Summary
This summary is machine-generated.

Computed tomography (CT) offers detailed in vivo human body composition analysis, accurately measuring tissues like fat and muscle. This review details CT

Keywords:
Computed tomographyHuman body compartmentsMeasurement methodsΒody composition

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Area of Science:

  • Radiology and Medical Imaging
  • Human Physiology
  • Biomedical Engineering

Background:

  • Accurate in vivo human body composition assessment is crucial for clinical studies and understanding metabolic disorders.
  • Computed tomography (CT) is a powerful imaging modality with high-resolution capabilities.
  • Evaluating body composition involves analyzing various tissue compartments.

Purpose of the Study:

  • To provide a comprehensive review of computed tomography (CT) applications for in vivo human body composition analysis.
  • To discuss the clinical utility of CT in differentiating tissue types and quantifying body compartments.
  • To present and evaluate different methods for estimating body composition from CT data.

Main Methods:

  • Review of existing literature on CT for body composition analysis.
  • Discussion of CT's ability to differentiate and quantify adipose tissue, skeletal muscle, bone, and organs.
  • Exploration of manual, semi-automatic, and automatic segmentation techniques for CT image analysis.

Main Results:

  • High-resolution CT enables precise separation of body compartments at the tissue/organ level.
  • CT can distinguish cortical from trabecular bone and visceral from subcutaneous fat.
  • CT provides valuable data on muscle and liver fat infiltration, skeletal muscle attenuation, and bone mineral density.

Conclusions:

  • Computed tomography (CT) is a versatile tool for accurate and reproducible in vivo human body composition quantification.
  • CT-based body composition analysis offers significant clinical value, particularly in metabolic disorder research.
  • Various quantitative methods exist for CT data analysis, each with specific advantages and limitations.