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Diffraction tomographic reconstruction from intensity data.

A J Devaney1

  • 1Dept. of Electr. and Comput. Eng., Northeastern Univ., Boston, MA.

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|January 1, 1992
PubMed
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Reconstructing scattering objects using diffraction tomography (DT) is possible with only intensity data. Standard DT methods yield high-quality approximate reconstructions from intensity measurements, validated by simulations.

Area of Science:

  • Optics
  • Wave physics
  • Image reconstruction

Background:

  • Diffraction tomography (DT) typically requires both magnitude and phase of wavefields for accurate reconstruction.
  • Reconstructing the complex refractive index of scattering objects is crucial in various imaging applications.
  • Limited data, such as only intensity measurements, poses a challenge for traditional DT methods.

Purpose of the Study:

  • To investigate the feasibility of reconstructing a weakly inhomogeneous scattering object's complex refractive index using only intensity data.
  • To evaluate the effectiveness of standard diffraction tomography (DT) reconstruction procedures when applied to intensity-only measurements.
  • To compare the quality of reconstructions obtained from intensity data versus those obtained from magnitude and phase data.

Main Methods:

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  • Utilized standard diffraction tomography (DT) reconstruction algorithms.
  • Performed scattering experiments with a focus on measuring transmitted wavefield intensities.
  • Conducted computer simulations to compare reconstruction outcomes from different data types (intensity-only vs. magnitude and phase).

Main Results:

  • High-quality approximate reconstructions of the complex refractive index were achieved using only intensity data.
  • Standard DT procedures proved effective even when applied to intensity measurements.
  • Simulations demonstrated that intensity-based reconstructions closely approximated optimal reconstructions derived from full wavefield data.

Conclusions:

  • Reconstruction of scattering objects using diffraction tomography (DT) is feasible with intensity data alone.
  • Standard DT reconstruction algorithms can yield valuable approximate results from intensity measurements.
  • The findings support the use of intensity-only measurements in specific diffraction tomography applications, simplifying data acquisition.