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Visualisation of retinal blood flow by laser speckle flowgraphy

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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.

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Authors and Affiliations

  1. Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, 820, Fukuoka, Japan

    H. Fujii

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  1. H. Fujii
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Fujii, H. Visualisation of retinal blood flow by laser speckle flowgraphy. Med. Biol. Eng. Comput. 32, 302–304 (1994). https://doi.org/10.1007/BF02512526

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  • DOI: https://doi.org/10.1007/BF02512526

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