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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 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...
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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...
Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
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...

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Related Experiment Video

Updated: May 31, 2026

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
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Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Published on: December 9, 2021

Dynamic tomography with a priori information.

Glenn R Myers1, Andrew M Kingston, Trond K Varslot

  • 1Department of Applied Mathematics, The Australian National University, Canberra, Australian Capital Territory 0200, Australia. grm110@rsphysse.anu.edu.au

Applied Optics
|July 12, 2011
PubMed
Summary
This summary is machine-generated.

New dynamic tomography algorithms enable high-resolution, time-resolved imaging of complex systems. These advanced techniques improve frame rates by tenfold, allowing visualization of previously impossible processes like fluid flow.

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Area of Science:

  • Physics
  • Engineering
  • Materials Science

Background:

  • Complex systems evolve over time, posing challenges for traditional imaging techniques.
  • Existing x-ray micro-computed tomography (micro-CT) methods often lack the temporal resolution to capture dynamic processes.
  • Understanding time-evolving phenomena is crucial across various scientific disciplines.

Purpose of the Study:

  • To introduce novel dynamic tomography algorithms for high-resolution, time-resolved imaging.
  • To enhance the frame rates of micro-CT imaging by at least an order of magnitude.
  • To enable the study of previously intractable dynamic processes.

Main Methods:

  • Development of dynamic tomography algorithms incorporating physical constraints.
  • Utilization of a priori knowledge of system geometry within iterative reconstruction techniques.
  • Application of algorithms to experimental data from an x-ray micro-CT facility.

Main Results:

  • Achieved significant improvements in imaging frame rates (at least tenfold).
  • Enabled high-resolution, time-resolved imaging of dynamic complex systems.
  • Successfully reconstructed experimental data, demonstrating algorithm efficacy.

Conclusions:

  • Dynamic tomography algorithms offer a breakthrough for studying time-evolving complex systems.
  • The developed methods significantly advance the capabilities of existing x-ray micro-CT facilities.
  • This technology opens new avenues for investigating phenomena such as two-phase fluid flow.