Non-invasive blood flow measurements using ultrasound modulated diffused light

N. Racheli, A. Ron, Y. Metzger, I. Breskin, G. Enden, M. Balberg, R. Shechter

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Scopus citations


Adequate capillary blood flow is a critical parameter for tissue vitality. We present a novel non-invasive method for measuring blood flow based on the acousto-optic effect, using ultrasound modulated diffused light. The benefits of the presented method are: deep tissue sampling (> 1cm), continuous real time measurement, simplicity of apparatus and ease of operation. We demonstrate the ability of the method to measure flow of scattering fluid using a calibrated flow phantom model. Fluid flow was generated by a calibrated syringe pump and the phantom's sampled volume contained millimeter size flow channels. Results demonstrate linear dependence of flow as measured by the presented technique (CFI) to actual flow values with R 2=0.91 in the range of 0 to 2 ml/min, and a linear correlation to simultaneous readings of a laser Doppler probe from the same phantom. This data demonstrates that CFI readings provide a non-invasive platform form measuring tissue microcirculatory blood flow.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2012
StatePublished - 9 Apr 2012
EventPhotons Plus Ultrasound: Imaging and Sensing 2012 - San Francisco, CA, United States
Duration: 22 Jan 201224 Jan 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferencePhotons Plus Ultrasound: Imaging and Sensing 2012
Country/TerritoryUnited States
CitySan Francisco, CA


  • Acousto optic effect
  • Capillary blood flow
  • Near infrared
  • Phantom
  • Ultrasound modulated light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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