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US 7,465,299 B2Granted
Monitoring of retinal temperature during laser therapy
OwnerLuigi Rovati, Giovanni Staurenghiinventors
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Abstract
In a laser eye treatment apparatus, a probe light source generates a secondary emitted light emanating from a treatment area of retinal tissue that is irradiated by a treatment light source. An optical detector detects the secondary emitted light. A processor statistically analyzes the secondary emitted light to determine a temperature of the treatment area of retinal tissue.
Claims18
A method for measuring retinal temperature, the method comprising:
- generating secondary emitted light emanating from retinal tissue;
- detecting the secondary emitted light emanating from the retinal tissue;
- statistically analyzing temporal fluctuation of the detected secondary emitted light using a control unit including electronics configured for determining a statistical scattering characteristic of the secondary emitted light, the statistical scattering characteristic modeling substantially Brownian motion of illuminated particles of the retinal tissue, and to derive a temperature of the retinal tissue from the statistical scattering characteristic modeling substantially Brownian motion of illuminated particles of the retinal tissue.
A laser eye treatment method comprising:
- applying a treatment laser to a treatment area of retinal tissue;
- generating secondary emitted light emanating from the treatment area of retinal tissue;
- detecting the secondary emitted light;
- and
- processing the detected secondary emitted light using a control system including electronics configured to perform method operations including determining a statistical scattering characteristic of the secondary emitted light computing a parameter kD of molecules of the treatment area of retinal tissue from the statistical scattering characteristic, and deriving a retinal temperature from the parameter kD.
2 more elements
The A laser eye treatment apparatus comprising:
- a continuous wave probe light source for generating secondary light emanating from a treatment area of retinal tissue that is irradiated by a treatment light source;
- an optical detector for detecting the secondary light and
- a processor for statistically analyzing the secondary light to determine a temperature of the treatment area of retinal tissue, the processor including a correlator that generates an autocorrelation of the output of the optical detector.
Dependencies are inferred from the claim text.