Shape analysis of surfaces
AssigneeUniversity of Louisville Research Foundation, Inc.
InventorsEdward A. Essock, Michael J. Sinai
Life of this patent
Estimating the term…
Abstract
A method and apparatus are provided to map the shape or thickness of a surface. Thickness estimates across a distance are received, and Fourier analysis is performed to generate Fourier amplitude coefficients and phase values for a number of frequency components. Linear discriminant functions are used to characterize the resulting shape as normal or not. Discriminant functions are provided that aid in the diagnosis of glaucoma when the thickness measured is the retinal nerve fiber layer thickness.
Claims22
A method comprising:
- receiving waveform data representing a shape of a surface;
- determining a plurality of Fourier coefficient amplitudes and phase values corresponding to the waveform data;
- entering at least one phase value into a discriminant measure;
- and
- comparing a result of the discriminant measure against a threshold.
An article comprising a machine-accessible media having associated data, wherein the data, when accessed, results in a machine performing:
- acquiring data representing a nerve fiber layer thickness distribution of a retina;
- generating a plurality of first frequency component coefficients and phase values by performing a transform on the data representing the nerve fiber layer thickness distribution of the retina;
- and
- entering at least one of the plurality of first frequency component phase values into a discriminant function to aid in the diagnosis of glaucoma.
A method comprising:
- receiving data representing nerve fiber layer thicknesses of a retina;
- performing a Fourier transform on the data to obtain coefficients representing frequency components and corresponding phase values of the data;
- and
- performing a discriminant analysis to determine a discriminant measure from the coefficients to aid in the diagnosis of glaucoma.
Dependencies are inferred from the claim text.