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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...
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Mandible bone mineral density estimation using spectral panoramic X-ray imaging.

Villeseveri Somerkivi1,2,3, Thorsten Sellerer1,2, Daniel Berthe1,2

  • 1Department of Physics, School of Natural Sciences, Technical University of Munich, Garching, Germany.

Imaging Science in Dentistry
|April 7, 2025
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Summary

Spectral panoramic imaging can accurately measure mandible bone mineral density (BMD). This method shows promise for osteoporosis screening, offering a viable alternative to dual-energy CT scans.

Keywords:
Bone DensityRadiography, Dual-Energy Scanned ProjectionX-Rays

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Area of Science:

  • Dental Imaging
  • Radiology
  • Osteoporosis Research

Background:

  • Mandible bone mineral density (BMD) assessment is crucial for osteoporosis diagnosis.
  • Current methods for BMD measurement can be resource-intensive or involve higher radiation doses.

Purpose of the Study:

  • To evaluate the feasibility of spectral panoramic imaging for determining mandible BMD.
  • To compare BMD measurements from spectral panoramic imaging with dual-energy CT (DECT) data.

Main Methods:

  • Areal BMD was measured from anthropomorphic phantoms using a spectral panoramic system.
  • Results were compared to synthetic panoramic images derived from DECT acquisitions.
  • Reproducibility and linearity of BMD scores were assessed using phantom scans.

Main Results:

  • Spectral panoramic imaging produced visually similar images to DECT.
  • High correlation (0.969) and low root mean squared error (0.0292 g/cm²) were observed between spectral panoramic and DECT BMD scores.
  • The system demonstrated excellent linearity (0.998) across a range of BMD values and was robust to minor positioning errors.

Conclusions:

  • Spectral panoramic imaging provides consistent BMD data comparable to DECT.
  • This technique holds potential for osteoporosis screening due to its accuracy and integration with existing panoramic imaging infrastructure.