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Article
February 1977

Relative Photometric Measurements of Retinal Circulation (Dromofluorograms)A Television Technique

Author Affiliations

From the Ophthalmic Bioengineering Service (Mr Fonda) and Eye Clinic (Dr Bagolini), University of Modena, Italy.

Arch Ophthalmol. 1977;95(2):302-307. doi:10.1001/archopht.1977.04450020103017
Abstract

• Television fluoroangiography is used in order to obtain fluorescein dilution curves (dromofluorograms [From the Greek word: δ ρ ο μ ο, which means flowing. We coined this word because dilution curves do not afford a true measurement of the blood circulation, or simply of a dilution, but of the fluorescein transport in the circulation!]) from single retinal vessels. An optical fiber conveys the light from a single retinal artery, vein, or any other retinal area on the video screen to a photomultiplier. After lowpass electronic filtration, the dilution curves are recorded on a strip-chart recorder. The measurements considered are all related to time: the time interval between initial instants of the arterial and venous curve; the time interval between maximum instants; the arterial and venous curve rising times. It is seen that (1) the method is sensitive enough to enable variations in the quantities in pathologic cases to be detected; (2) owing to the great variability from part to part of the vessels, it is important to specify where the retinal dromofluorogram has been recorded.

(Arch Ophthalmol 95:302-307, 1977)

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