Related Experiment Video

Updated: Aug 30, 2026

Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph
05:32

Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph

Published on: February 21, 2025

Optimal contrast application for cardiac 4-detector-row computed tomography

Christoph R Becker1, Cheng Hong, Andreas Knez

  • 1Department of Clinical Radiology, University Hospital Munich, Grosshadern, Germany. christoph.becker@ikra.med.uni-muenchen.de

Investigative Radiology
|October 21, 2003
PubMed

Insights

Optimal contrast enhancement for cardiac 4-detector-row computed tomography was achieved with an injection rate of approximately 1 g iodine/s. This protocol ensures diagnostic image quality for coronary artery assessment.

Area of Science:

  • Radiology
  • Medical Imaging
  • Cardiovascular Imaging

Background:

  • 4-detector-row computed tomography (CT) angiography is crucial for cardiac imaging.
  • Optimizing contrast media protocols is essential for diagnostic accuracy.

Purpose of the Study:

  • To determine the optimal contrast injection protocol for cardiac 4-detector-row CT angiography.
  • To evaluate the impact of iodine concentration and flow rate on contrast enhancement.

Main Methods:

  • Sixty patients were randomized into four groups based on iodine concentration (300 and 400 mg/mL) and flow rates (2.5 and 3.5 mL/s).
  • Contrast density was measured in the left ventricle and coronary arteries.

Main Results:

  • An injection rate of 0.75 g iodine/s showed suboptimal enhancement in 46.2% of patients.
  • Rates around 1 g iodine/s provided optimal contrast enhancement (250-300 HU).
  • Higher rates (1.4 g iodine/s) led to excessive enhancement (>350 HU), potentially obscuring coronary calcifications.

Conclusions:

  • An injection rate of approximately 1 g iodine/s is recommended for optimal contrast enhancement in cardiac 4-detector-row CT.
  • This protocol balances diagnostic image quality with the avoidance of image artifacts.
Abstract

More Related Videos

Anatomical Reconstructions of the Human Cardiac Venous System using Contrast-computed Tomography of Perfusion-fixed Specimens06:02

Anatomical Reconstructions of the Human Cardiac Venous System using Contrast-computed Tomography of Perfusion-fixed Specimens

Published on: April 18, 2013

High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals11:09

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

Published on: December 16, 2022

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...
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 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...
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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,...
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...