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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
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
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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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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.
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Related Experiment Video

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Clinical Imaging of Microwave Mammography
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Published on: November 14, 2025

A method for 3D electron density imaging using single scattered x-rays with application to mammographic screening.

Eric Van Uytven1, Stephen Pistorius, Richard Gordon

  • 1National Research Council Institute for Biodiagnostics, 435 Ellice Ave, Winnipeg, Manitoba, R3B 1Y6, Canada. eric.vanuytven@nrc-cnrc.gc.ca

Physics in Medicine and Biology
|September 4, 2008
PubMed
Summary

This study introduces a new 3D electron density imaging technique for breast cancer detection. The method shows promise in differentiating cancerous lesions from normal tissue, potentially improving mammography accuracy.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biophysics

Background:

  • Current mammography uses 2D projections of 3D breast tissue, hindering detection of small lesions obscured by overlying tissue.
  • Superimposition of dense tissue in mammograms can lead to false negatives, impacting early breast cancer diagnosis.

Purpose of the Study:

  • To investigate the feasibility of single scattered photon electron density imaging for breast cancer detection in a mammographic setting.
  • To develop and test an algorithm for generating 3D electron density images from a single projection.

Main Methods:

  • Simulated a low-energy (<20 keV) scanning pencil beam for photon interaction.
  • Developed a novel algorithm to reconstruct 3D electron density distributions from single-view scattered photon data.
  • Utilized a simulated mammographic accreditation phantom with embedded lesions of varying sizes for validation.

Main Results:

  • The developed algorithm successfully produced 3D electron density images from a single projection.
  • Imaged lesions exhibited statistically significant differences in electron density compared to background breast tissue (p<0.005).
  • The technique demonstrated potential for visualizing and differentiating simulated breast lesions.

Conclusions:

  • Single scattered photon electron density imaging offers a promising new modality for breast cancer diagnostics.
  • This 3D imaging approach may overcome limitations of conventional 2D mammography in detecting subtle lesions.
  • Electron density imaging warrants further investigation as a valuable tool for improving breast cancer screening and diagnosis.