Laser Doppler, speckle and related techniques for blood perfusion mapping and imaging.

@article{Briers2001LaserDS,
  title={Laser Doppler, speckle and related techniques for blood perfusion mapping and imaging.},
  author={J. David Briers},
  journal={Physiological measurement},
  year={2001},
  volume={22 4},
  pages={R35-66}
}
Laser Doppler velocimetry uses the frequency shift produced by the Doppler effect to measure velocity. It can be used to monitor blood flow or other tissue movement in the body. Laser speckle is a random interference effect that gives a grainy appearance to objects illuminated by laser light. If the object consists of individual moving scatterers (such as blood cells), the speckle pattern fluctuates. These fluctuations provide information about the velocity distribution of the scatterers. It… CONTINUE READING
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