Quantitative retinal imaging
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsArjen Amelink, Fokko Pieter Wieringa, Michiel Peter Oderwald
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Abstract
A method and system are proposed for imaging the retinal structure of an eye. A light source is provided and a repetitive pattern is projected on the retina by said hght source having illuminated and non-illuminated portions with a spatial frequency larger than 0.5 mm-1. For the illuminated and non-illuminated portions a fluorescence level is measured; and a fluorescence level is derived as a corrected value for illuminated and non-illuminated areas.
Claims18
A method of obtaining an image of the retinal structure of an eye, comprising:
- providing a light source;
- projecting s light in a plurality of phase shifted repetitive patterns on the retina by said light source, each pattern, of the phase shifted repetitive patterns, having an illuminated and a non-illuminated portions with a spatial frequency larger than 0.33 μtr[mm−1];
- measuring, for each pattern of the plurality of phase shifted repetitive patterns on the retina, an optical response for the illuminated and the non-illuminated portions of the retina;
- and
- deriving a retina tissue absorption value by combining, for each pattern of the plurality of phase shifted repetitive patterns on the retina, the optical response for the illuminated and the non-illuminated portions of the retina.
A system for imaging a retinal structure of an eye, the system comprising:
- a light source;
- a projector that projects a light of the light source in a plurality of phase shifted repetitive patterns on the retina, each pattern, of the phase shifted repetitive patterns, having an illuminated and a non-illuminated portions with a spatial frequency larger than 0.33 μtr [mm−1];
- an optical detector that detects, for each pattern of the plurality of phase shifted repetitive patterns on the retina, and optical response for the illuminated and the non-illuminated portions of the retina;
- and
- a processing device that derives a retina tissue absorption value by combining, for each pattern of the plurality of phase sifted repetitive patterns on the retina, the optical response for the illuminated and the non-illuminated portions of the retina.
Dependencies are inferred from the claim text.