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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.
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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Related Experiment Video

Updated: Jul 5, 2025

Combined Near-infrared Fluorescent Imaging and Micro-computed Tomography for Directly Visualizing Cerebral Thromboemboli
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Electromagnetic tomographic cerebral angiography.

Serguei Semenov1

  • 1EMTensor GmbH, 1220, Vienna, Austria. emtensor.serguei@gmail.com.

Scientific Reports
|January 20, 2024
PubMed
Summary

A new electromagnetic tomography (EMT) angiography method offers a dynamic, on-line approach for visualizing cerebral blood vessels. This technique overcomes limitations of traditional methods, enabling clear detection of small vessels.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Cardiovascular Diagnostics

Background:

  • Cardiovascular diseases (CVDs) are the leading global cause of death, necessitating accurate diagnostic tools.
  • Standard angiography methods (X-ray, CT, MRI) are effective but bulky, costly, energy-intensive, and may involve hazardous ionizing contrast agents.
  • Electromagnetic tomography (EMT) offers safe functional imaging but typically has limited spatial resolution for small targets like blood vessels.

Purpose of the Study:

  • To introduce a novel method for dynamic, on-line Electromagnetic Tomography (EMT) angiography.
  • To address the spatial resolution limitations of current EMT techniques for vascular imaging.
  • To demonstrate the applicability of the new EMT angiography method for cerebral angiography.

Main Methods:

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  • Development of a novel Electromagnetic Tomography (EMT) system and angiography method.
  • Application of the EMT angiography technique to cerebral vasculature imaging.
  • Assessment and discussion of technical challenges in developing EMT angiography systems.

Main Results:

  • The novel EMT angiography method successfully visualized cerebral blood vessels.
  • The technique demonstrated the capability to detect small cerebral vessels down to 1.3 mm in diameter.
  • The method could distinguish between vessels of different sizes, indicating high resolution.

Conclusions:

  • The presented EMT angiography method overcomes previous spatial resolution limitations.
  • This novel approach enables dynamic, on-line imaging of cerebral vasculature.
  • EMT angiography shows significant potential as a safer and potentially more accessible alternative to conventional angiography methods.