Measurements of retinal blood vessel diameter for biospeckle flowmetry

Yoshihisa Aizu; Toshimitsu Asakura

doi:10.1117/12.311896

19 June 1998 Measurements of retinal blood vessel diameter for biospeckle flowmetry

Yoshihisa Aizu, Toshimitsu Asakura

Proceedings Volume 3252, Optical Diagnostics of Biological Fluids III; (1998) https://doi.org/10.1117/12.311896
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

A method is described for measuring the retinal vessel diameter in bio-speckle flowmetry. Knowledge of the vessel diameter is required not only to calibrate the correlation time in velocity in the bio-speckle method, but also to evaluate a blood flow-volume rate. One-dimensional fundus reflectance patterns are detected across the retinal vessel by using a linear image sensor on the basis of spectral reflectance properties, and are used to determine the vessel diameter by using a signal processing. A total apparatus was constructed to measure simultaneously the vessel diameter and the correlation time and, thus, the flow velocity and the flow volume rate. The usefulness of the method was verified by in vivo experiments.

Citation Download Citation

Yoshihisa Aizu and Toshimitsu Asakura "Measurements of retinal blood vessel diameter for biospeckle flowmetry", Proc. SPIE 3252, Optical Diagnostics of Biological Fluids III, (19 June 1998); https://doi.org/10.1117/12.311896

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