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Related Concept Videos

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...
Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
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...
Computed Tomography01:10

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 I: CT and MRI01:14

Imaging Studies I: CT and MRI

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...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...

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Updated: Jun 13, 2026

Contrast Enhanced Vessel Imaging using MicroCT
05:50

Contrast Enhanced Vessel Imaging using MicroCT

Published on: January 27, 2011

Factors Affecting Contrast Enhancement on CT Images.

Zahra Alyani Nezhad1,2, Giuseppe V Toia1,2, Sean D Rose3

  • 1Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Ave, Madison, WI 53705-2275.

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|June 11, 2026
PubMed
Summary
This summary is machine-generated.

Optimizing iodinated contrast media (ICM) in CT scans is crucial for diagnostic accuracy. Understanding physics-based, patient-related, and protocol-based factors improves contrast enhancement and reduces repeat scans.

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Area of Science:

  • Radiology
  • Medical Imaging

Background:

  • Iodinated contrast media (ICM) enhance soft-tissue visualization in CT scans.
  • Iodine's high atomic number increases CT numbers and image contrast.
  • Suboptimal contrast enhancement leads to repeat CT examinations.

Purpose of the Study:

  • To elucidate factors influencing contrast enhancement in CT.
  • To provide a framework for optimizing ICM administration and scanning protocols.

Main Methods:

  • Categorization of influencing factors into physics-based, patient-related, and contrast protocol-based.
  • Stratification of factors into scalar, temporal, and sampling categories.
  • Analysis of how each factor impacts ICM enhancement dynamics.

Main Results:

  • Physics-based factors include tube potential and scan duration.
  • Patient-related factors involve blood volume and cardiac output.
  • Protocol-based factors encompass contrast volume, injection rate, and scan delay.

Conclusions:

  • Optimizing ICM delivery and CT scanning protocols requires understanding numerous interacting factors.
  • Knowledge of these parameters aids in achieving diagnostic-quality contrast enhancement.
  • This understanding empowers clinicians to improve CT examination utility.