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A compact time-domain diffuse optical tomography system for cortical neuroimaging.

Yaroslav Chekin1, Dakota Decker1, Hamid Dehghani1

  • 1Kernel, Culver City, CA, United States.

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|August 13, 2025
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Summary
This summary is machine-generated.

Researchers developed a whole-head time-domain diffuse optical tomography (TD-DOT) system to advance neuroimaging for precision neuromedicine. This novel system overcomes limitations of current technologies, offering improved scalability and cost-effectiveness for clinical applications.

Keywords:
absolute brain oxygenationbench-to-bedsidediffuse optical tomographyportable neuroimagingtime-domain NIRStime-resolved NIRS

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Medical Imaging

Background:

  • Neuroimaging is crucial for precision neuromedicine, but clinical translation faces scalability and cost barriers.
  • Time-domain functional near infrared spectroscopy (TD-fNIRS) offers depth sensitivity and absolute property resolution, surpassing continuous wave methods.
  • Existing TD-fNIRS systems suffer from limited availability, slow sampling, and sparse head coverage, hindering widespread adoption.

Purpose of the Study:

  • To overcome technical challenges and develop a whole-head time-domain diffuse optical tomography (TD-DOT) system.
  • To characterize the performance of the novel TD-DOT system using standardized protocols.
  • To compare the developed TD-DOT system with existing state-of-the-art systems and demonstrate its capabilities.

Main Methods:

  • Development of a novel whole-head time-domain diffuse optical tomography (TD-DOT) system.
  • System characterization using standardized protocols and comparison with other advanced systems.
  • Evaluation of system performance in mapping cortical activation during various functional tasks (hemodynamic, sensory, motor).

Main Results:

  • Successful development and characterization of a whole-head TD-DOT system.
  • Demonstrated superior performance compared to existing state-of-the-art neuroimaging systems.
  • Effective retrieval of cortical activation maps during diverse cognitive and motor tasks.

Conclusions:

  • The developed whole-head TD-DOT system addresses key limitations of current neuroimaging technologies.
  • The system's performance, signal quality, and ease of use pave the way for clinical applications.
  • This advancement holds significant potential for future precision neuromedicine research and applications.