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Updated: Mar 14, 2026
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
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Comprehensive Optimization of Interferometric Diffusing Wave Spectroscopy (iDWS)
Mingjun Zhao1, Leah Dickstein1, Akshay S Nadig1
1NYU Langone Health, New York, New York 10010, USA.
IEEE Journal of Selected Topics in Quantum Electronics : a Publication of the IEEE Lasers and Electro-Optics Society
|March 13, 2026
Summary
This study enhances interferometric diffusing wave spectroscopy (iDWS) for improved noninvasive cerebral blood flow index (CBFi) monitoring in adults. Optimized iDWS shows promise for clinical use, even in intensive care settings.
Area of Science:
- Biomedical optics
- Neuroscience
- Medical physics
Background:
- Noninvasive cerebral blood flow index (CBFi) monitoring is crucial for neurological conditions.
- Conventional Diffuse Correlation Spectroscopy (DCS) has limited brain sensitivity in adults.
- Emerging techniques aim to enhance diffuse light throughput and brain sensitivity for CBFi measurements.
Purpose of the Study:
- To optimize interferometric diffusing wave spectroscopy (iDWS) for improved CBFi monitoring.
- To enhance system performance regarding channel count, camera parameters, laser power, and data processing.
- To validate the optimized iDWS system for stable operation and clinical application.
Main Methods:
- Systematic optimization of iDWS parameters including channel number, camera duty cycle, full well capacity, laser power, and noise reduction.
- Development of a cart-based system with defined stable operating conditions.
- Implementation of advanced data processing techniques for artifact mitigation.
Main Results:
- Demonstrated pulsatile CBFi monitoring at 4-4.5 cm source-collector separation in adults with Fitzpatrick 4 skin pigmentation.
- Reported preliminary clinical measurements of patient CBFi in a Neuro Intensive Care Unit (Neuro ICU).
- Achieved performance exceeding previous iDWS CBFi monitoring reports.
Conclusions:
- The optimized iDWS system significantly improves noninvasive CBFi monitoring capabilities.
- The technology shows potential for real-time pulsatile CBFi assessment in clinical neurocritical care.
- Further advancements in iDWS performance push the boundaries for brain blood flow assessment.
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