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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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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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
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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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Related Experiment Video

Updated: Oct 4, 2025

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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Dark-field computed tomography reaches the human scale.

Manuel Viermetz1,2, Nikolai Gustschin3,2, Clemens Schmid3,2

  • 1Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany; manuel.viermetz@tum.de.

Proceedings of the National Academy of Sciences of the United States of America
|February 8, 2022
PubMed
Summary
This summary is machine-generated.

Dark-field computed tomography (CT) now integrates into clinical scanners, enabling rapid, human-scale imaging. This breakthrough overcomes previous limitations, paving the way for advanced medical diagnostics and tissue microstructure analysis in clinical settings.

Keywords:
Talbot–Lau interferometryX-ray imagingX-ray small-angle scatteringcomputed tomographydark-field imaging

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Area of Science:

  • Medical Imaging
  • Wave-Optics Physics
  • Biomedical Engineering

Background:

  • X-ray computed tomography (CT) is a standard 3D medical imaging technique.
  • Current CT innovations include dual-energy and spectral photon-counting.
  • Wave-optical contrast mechanisms offer complementary information beyond X-ray attenuation, revealing tissue microstructure.

Purpose of the Study:

  • To adapt and upscale dark-field imaging for human-scale CT scanners.
  • To overcome technical challenges hindering clinical translation of dark-field CT.
  • To demonstrate rapid dark-field CT acquisition on a human-sized phantom.

Main Methods:

  • Integration of a Talbot-Lau interferometer into a clinical CT gantry.
  • Development of hardware and software solutions for high-speed, large-field-of-view CT.
  • Reconstruction of dark-field CT data from a single rotation scan.

Main Results:

  • Successful integration of a Talbot-Lau interferometer into a clinical CT gantry.
  • Demonstration of human-sized dark-field CT imaging with a single 1-second scan.
  • Overcoming key roadblocks for clinical translation, including vibrations and continuous rotation.

Conclusions:

  • Dark-field CT is now feasible on a clinical scale, overcoming previous limitations.
  • This advancement enables rapid, high-resolution imaging of tissue microstructure.
  • Clinical dark-field CT studies in human patients are anticipated in the near future.