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Related Experiment Video

Updated: Jul 19, 2025

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
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A comprehensive workflow and its validation for simulating diffuse speckle statistics for optical blood flow

Lisa Kobayashi Frisk1, Manish Verma1, Faruk Bešlija1

  • 1ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain.

Biorxiv : the Preprint Server for Biology
|August 14, 2023
PubMed
Summary

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Speckle contrast optical spectroscopy and tomography (SCOS and SCOT) measure blood flow. Simulations reveal detector noise impacts accuracy, guiding practical instrument design for better blood flow measurement.

Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Physiological Monitoring

Background:

  • Diffuse optical methods like speckle contrast optical spectroscopy and tomography (SCOS and SCOT) are crucial for measuring deep blood flow.
  • Designing practical SCOS and SCOT systems requires careful consideration of signal-to-noise ratio (SNR) and statistical sampling limitations.

Approach:

  • A novel simulation method was developed to model speckle contrast signals, incorporating detector noise effects.
  • The simulation method was experimentally validated to ensure its accuracy and reliability.
  • Simulations were employed to investigate the influence of various physical and experimental parameters on the accuracy and precision of speckle contrast measurements.

Key Points:

  • Systematic detector effects were found to significantly decrease the accuracy and precision of speckle contrast measurements, particularly under low detected signal conditions.

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  • Understanding these detector effects is critical for optimizing SCOS and SCOT performance.

    • Conclusions:

    • The developed simulation method provides valuable insights into the performance of SCOS and SCOT instruments.
    • These findings offer essential guidelines for the design and operational usage of SCOS and SCOT systems to enhance deep blood flow measurements.