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Visualisation of retinal blood flow by laser speckle flowgraphy

  • H. Fujii
Physiological Measurement

Abstract

A new method is demonstrated to visualise the microcirculation map of the human retina using a dynamic laser speckle effect. The retina is illuminated with a diode laser spot through a retinal camera, and its speckle image is detected by an area sensor. The output signal from the sensor is digitised, and the data for more than a hundred scannings of the speckle image are stored in a mass image memory. The difference between a pair of successive image data was calculated and integrated for each pixel. The results were displayed in colour graphics showing the spatial distribution of the blood flow in the retina.

Keywords

Blood flow measurement Laser Ophthalmologic instrument 

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References

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Copyright information

© IFMBE 1994

Authors and Affiliations

  • H. Fujii
    • 1
  1. 1.Department of Computer Science and ElectronicsKyushu Institute of TechnologyFukuokaJapan

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