OPTICAL COHERENCE TOMOGRAPHY SYSTEM FOR HEALTH CHARACTERIZATION OF AN EYE

摘要

This disclosure relates to the field of Optical Coherence Tomography (OCT). This disclosure particularly relates to methods and systems for providing larger field of view OCT images. This disclosure also particularly relates to methods and systems for OCT angiography. This disclosure further relates to systems for health characterization of an eye by OCT angiography. This OCT angiography system may determine a feature of a vasculature within an eye tissue and thereby identify a vascular anomaly and a spatial location of the vascular anomaly within the eye tissue.

主权项

1. An optical coherence tomography (OCT) system for health characterization of an eye having a configuration that:
(a) scans tissue of an eye of a subject, which has a surface and a depth, with a beam of light that has a beam width and a direction; (b) acquires OCT signals from the scan; (c) forms at least one B-scan cluster set using the acquired OCT signals such that:
each B-scan cluster set includes at least two B-scan clusters;each B-scan cluster includes at least two B-scans;each B-scan includes at least two A-scans;if there is more than one B-scan cluster set, each B-scan cluster set is parallel to one another;each B-scan cluster set is parallel to the direction of the beam of light;the B-scans within each B-scan cluster set are parallel to one another and parallel to the direction of the beam of light;each A-scan, each B-scan, each B-scan cluster, and each B-scan cluster set are formed at a different time than all other A-scans, B-scans, B-scan clusters, and B-scan cluster sets, respectively;each A-scan is separated from any next formed A-scan by a distance (“A-scan distance”);each B-scan within each B-scan cluster is separated from any next formed B-scan within that B-scan cluster by a distance (“intra-cluster distance”) in the range of 0 to half of the beam width; andthe last formed B-scan within each B-scan cluster is separated from the first formed B-scan within any next formed B-scan cluster (“inter-cluster distance”) by at least one micrometer; (d) calculates OCT angiography data using the at least one B-scan cluster set formed at (c) of this claim and based on motion occurring within the eye tissue; and (e) determines a feature of a vasculature within the eye tissue by using the calculated angiography data.