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US 11,432,719 B2Granted
Visual field simulation using optical coherence tomography and optical coherence tomographic angiography
AssigneeOregon Health & Science University
InventorsDavid Huang, Ou Tan, Liang Liu
Life of this patent
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Abstract
Disclosed herein are methods for simulating the results of a visual field (VF) test using an optical coherence tomography (OCT) system. The disclosed methods may utilize structural information extracted from OCT image datasets, such as thickness measurements, or may utilize functional information, such as blood perfusion measurements, extracted from OCT angiography (OCTA) image datasets. Other embodiments may be described and claimed.
Claims28
A computer-implemented method comprising:
- receiving an image dataset that corresponds to an optical coherence tomography (OCT) scan or an OCT angiography (OCTA) scan of an eye;
- generating a map for a parameter based on the image dataset;
- dividing the map into multiple sector maps that correspond to predefined visual field sectors;
- determining respective average values of the parameter within each of the individual sector maps;
- applying a logarithmic decibel transformation to the average values, thereby generating respective simVF sector values;
- determining a weighted logarithmic average from the respective simVF sector values;
- and
- applying a linear or nonlinear transformation to the weighted logarithmic average, thereby generating a simVF mean deviation (MD) value in dB scale.
5 more elements
A computer-implemented method comprising:
- receiving an OCTA image dataset for an optic nerve head (ONH) and surrounding peripapillary retina;
- generating an OCTA perfusion map from the OCTA image dataset;
- dividing the OCTA perfusion map into a plurality of sectors that correspond to predefined visual field (VF) sectors;
- calculating average perfusion values for respective individual sectors of the plurality of sectors;
- offsetting the average perfusion values in the individual sectors to account for floor value effects;
- transforming the offsetted average perfusion values to a logarithmic decibel (dB) scale, thereby generating a set of perfusion-simulated VF values;
- converting the set of perfusion-simulated VF values to simulated sector visual field deviation values based on population data;
- calculating a weighted logarithmic average of the simulated sector visual field deviation values;
- and
- converting the weighted logarithmic average of the simulated sector visual field deviation values to a VF mean deviation (MD) value based on the population data.
7 more elements
A system comprising:
- an optical coherence tomography (OCT) system to acquire an image dataset for an eye, wherein the image dataset is an OCT dataset or an OCTA dataset;
- a logic subsystem;
- and
- a data holding subsystem comprising machine-readable instructions stored thereon that are executable by the logic subsystem to:
- generate a map for a parameter based on the image dataset;
- divide the map into multiple sector maps that correspond to predefined visual field sectors;
- determine respective average values of the parameter within the individual sector maps;
- apply a logarithmic decibel transformation to the average values to generate respective simVF sector values;
- determine a weighted logarithmic average from the respective simVF sector values;
- and
- apply a linear or nonlinear transformation to the weighted logarithmic average to generate a simVF mean deviation (MD) value in dB scale.
8 more elements
Dependencies are inferred from the claim text.