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Lock-in-photon-counting-based highly-sensitive and large-dynamic imaging system for continuous-wave diffuse optical

Weiting Chen1, Xin Wang1, Bingyuan Wang1

  • 1Collage of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China.

Biomedical Optics Express
|March 16, 2016
PubMed
Summary
This summary is machine-generated.

A new lock-in photon-counting detection method enhances diffuse optical tomography systems. This innovative approach improves measurement sensitivity and parallelism for advanced biomedical imaging applications.

Keywords:
(120.0120) Instrumentation, measurement, and metrology(170.2655) Functional monitoring and imaging(170.3890) Medical optics instrumentation(170.4090) Modulation techniques(170.6960) Tomography

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Area of Science:

  • Biomedical Optics
  • Instrumentation and Measurement
  • Medical Imaging

Background:

  • Diffuse optical tomography (DOT) systems require high sensitivity and parallel processing for effective imaging.
  • Existing DOT technologies face limitations in sensitivity, speed, and crosstalk between measurement channels.

Purpose of the Study:

  • To develop a novel dual-wavelength simultaneous measurement continuous wave diffuse optical tomography system.
  • To integrate lock-in technique with photon-counting detection for enhanced performance.
  • To validate the system's performance using phantom and 2-D imaging experiments.

Main Methods:

  • Implementation of a novel lock-in photon-counting detection architecture.
  • Development of a 16-source, 16-detector continuous wave diffuse optical tomography system.
  • Utilizing phantom experiments for methodology validation and performance assessment.

Main Results:

  • Demonstrated excellent measurement linearity and moderate-term system stability.
  • Showcased robustness to noise and negligible inter-wavelength crosstalk.
  • Validated high sensitivity and reliability of the proposed system through 2-D imaging.

Conclusions:

  • The developed lock-in photon-counting detection architecture significantly advances diffuse optical tomography.
  • The system exhibits high sensitivity, stability, and noise robustness, suitable for advanced imaging.
  • The detection principle offers potential for fully parallelized instrumentation in broader applications.