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Hyperspectral wide-field time domain single-pixel diffuse optical tomography platform.

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We developed a novel time domain diffuse optical tomography (TD-DOT) system for enhanced functional and molecular imaging. This advanced platform accelerates imaging and improves reconstruction for preclinical and clinical applications.

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Area of Science:

  • Biomedical Optics
  • Optical Imaging
  • Photonics

Background:

  • Diffuse optical tomography (DOT) is a promising non-invasive imaging technique.
  • Time domain DOT (TD-DOT) offers improved depth resolution and sensitivity.
  • Existing TD-DOT systems face challenges in speed and reconstruction accuracy.

Purpose of the Study:

  • To present the design and characterization of a novel wide-field TD-DOT platform.
  • To enable faster and more accurate functional and molecular imaging in turbid media.
  • To facilitate the clinical translation of TD-DOT.

Main Methods:

  • Utilized wide-field illumination and hyperspectral time-resolved single-pixel detection.
  • Incorporated dual digital micro-mirror devices (DMDs) for structured light generation.
  • Employed a spectrally resolved multi-anode photomultiplier tube (PMT) with time-correlated single-photon counting (TCSPC) across 16 wavelength channels.

Main Results:

  • Comprehensive characterization of the system's spatial, temporal, and spectral performance.
  • Successful mapping of two spectrally distinct absorbers within a 20 mm thick turbid phantom.
  • Demonstrated the potential for accelerated imaging and improved reconstruction fidelity.

Conclusions:

  • The developed TD-DOT platform offers significant advancements for biomedical imaging.
  • The system's capabilities pave the way for wider adoption in preclinical and clinical settings.
  • This technology holds promise for enhanced functional and molecular imaging in vivo.