OCT data processing device and non-transitory computer-readable medium storing computer-readable instructions

A non-transitory computer-readable medium storing computer-readable instructions that, when executed by a processor of an optical coherence tomography (OCT) data processing device, cause the processor of the OCT data processing device to perform processes comprising:

• acquiring three-dimensional OCT data, the three-dimensional OCT data being OCT data of a tissue of a subject's eye acquired by an OCT device, the OCT device comprises an OCT light source, a branching optical element, an irradiation optical system, a multiplexing optical element, and a photodetector, the branching optical element dividing light emitted from the OCT light source into measurement light and reference light, the irradiation optical system irradiating the measurement light divided by the branching optical element onto the tissue, the multiplexing optical element combining the measurement light reflected by the tissue and the reference light divided by the branching optical element and cause the measurement light and the reference light to interfere with each other, the photodetector detecting an interference signal by receiving interference light generated by the multiplexing optical element, the three-dimensional OCT data being three-dimensional OCT data obtained by irradiating the measurement light on a two-dimensional measurement region, the two-dimensional measurement region extending in a direction intersecting an optical axis of the measurement light;
• setting a line pattern, from among a plurality of types of line pattern, with respect to the two-dimensional measurement region for which the three-dimensional OCT data is obtained, at least one of an arrangement, a number, or a shape of one or more lines being different for the plurality of types of line pattern;
• and
• extracting, from the three-dimensional OCT data, a two-dimensional tomographic image of a cross section intersecting each of the one or more lines of the set line pattern.