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Grating-based phase-contrast computed tomography for breast tissue at an inverse compton source.

Daniel Berthe1,2,3, Lisa Heck4,5,6, Sandra Resch4,5,6

  • 1Chair of Biomedical Physics, Department of Physics, TUM School of Natural Sciences, Technical University of Munich, Garching, 85748, Germany. Daniel.Berthe@tum.de.

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Grating-based phase-contrast breast computed tomography (gbpc-BCT) enhances soft tissue contrast for improved breast cancer detection, especially in dense tissue. This novel imaging technique shows promise for clearer microcalcification classification and lesion identification at comparable radiation doses.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biophysics

Background:

  • Mammography screening reduces breast cancer mortality but struggles with dense tissue detection.
  • Phase-contrast imaging offers improved soft tissue contrast for enhanced diagnosis.
  • Grating-based techniques acquire absorption, phase-contrast, and dark-field (scattering) images simultaneously.

Purpose of the Study:

  • To investigate the benefits of combining grating-based phase-contrast imaging with breast computed tomography (BCT).
  • To explore the potential of grating-based phase-contrast breast computed tomography (gbpc-BCT) for breast cancer diagnosis.

Main Methods:

  • Utilized a breast phantom and a dissected fibroadenoma for testing.
  • Employed grating-based phase-contrast imaging integrated with BCT (gbpc-BCT).
  • Evaluated image contrast and scattering properties.

Main Results:

  • Demonstrated improved image contrast using gbpc-BCT.
  • Showcased the capability of dark-field imaging for microcalcification classification.
  • Achieved these improvements at radiation doses comparable to clinical BCT.

Conclusions:

  • Grating-based phase-contrast breast computed tomography (gbpc-BCT) offers superior soft tissue contrast and microcalcification characterization.
  • This combined approach holds significant potential for advancing breast cancer diagnosis.
  • The technique is feasible at clinically relevant radiation doses.