OPTICAL COHERENCE TOMOGRAPHY WITH DYNAMIC FOCUS SWEEPING AND WINDOWED AVERAGING

摘要

During scan capture with an OCT imaging system, the focal plane position can be simultaneously shifted over at least a portion of an image range. As a result, a plurality of image frames respectively corresponding to various focal plane positions is acquired. The image frames can be combined to generate a composite image having suitable resolution throughout the image range, including regions associated with weak-intensity or low-reflectance features. Further, windowed averaging can be performed prior to generation of the composite image so that the composite image incorporates weights given to image data in focus.

主权项

1. An optical coherence tomography (OCT) imaging system, comprising:
an optical sub-system for capturing OCT scan data of a subject, the optical sub-system comprising an objective lens for transmitting a scanning beam from a light source to the subject, the objective lens being configurable such that a focal plane position relative to the subject is adjustable; and a control apparatus for controlling the capturing of OCT scan data by the optical sub-system, for configuring the objective lens to adjust the focal plane position relative to the subject, and for processing the OCT scan data to generate at least one OCT image such that for each focal plane position of a plurality of focal plane positions, the OCT scan data comprises one or more two-dimensional scan captures.