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Related Concept Videos

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...
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...
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 VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...

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Related Experiment Video

Updated: May 8, 2026

Contrast Enhanced Vessel Imaging using MicroCT
05:50

Contrast Enhanced Vessel Imaging using MicroCT

Published on: January 28, 2011

Image intensifier-based computed tomography volume scanner for angiography

R Ning1, R A Kruger

  • 1Department of Radiology, University of Rochester Medical Center, NY 14642, USA.

Academic Radiology
|April 1, 1996
PubMed
Summary
This summary is machine-generated.

A new volume computed tomography (CT) system using an image intensifier (II) shows promise for direct 3D vascular reconstruction in angiography. Phantom studies indicate good image quality and signal-to-noise ratio for enhanced visualization.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biomedical Engineering

Background:

  • Conventional computed tomography (CT) systems have limitations in direct 3D vascular reconstruction.
  • Image intensifier (II) technology offers potential for improved angiographic imaging.

Purpose of the Study:

  • To design, construct, and evaluate a prototype volume CT system for direct 3D reconstruction of vascular structures.
  • To assess the imaging performance of an II-based volume CT system using phantom studies.

Main Methods:

  • A prototype volume CT system with a fixed X-ray tube and II-coupled camera was developed.
  • Projection images of a vascular phantom were acquired at 250 angles for direct 3D cone-beam reconstruction.
  • Signal-to-noise ratio (SNR) and spatial resolution were measured from reconstructed images.

Main Results:

  • The system achieved reasonably good SNRs in direct 3D reconstructions.
  • Background noise levels were approximately 30 Hounsfield units.
  • Measured spatial resolution was 0.5 line pairs/mm, with reduced resolution at the image edges.

Conclusions:

  • An II-based volume CT scanner can produce direct 3D reconstructions of vascular structures.
  • The system demonstrates good image quality suitable for intraarterial angiography.