Patent ID: 11857257
Assignee: OPTOS PLC
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 14:
15. The apparatus according to claim 2, wherein:
the receiver module is configured to receive a sequence of B-scans, which has been generated by the OCT imaging device repeatedly scanning the scanned region of the retina over the time period, as the OCT image data;
the apparatus further comprises a B-scan processing module configured to:
segment each B-scan in the sequence of B-scans into a plurality of B-scan layers so that each B-scan layer comprises respective sections of the A-scans forming the B-scan, and concatenating corresponding B-scan layers from the segmented B-scans to generate sequences of concatenated B-scan layers; and
convert each of at least one sequence of concatenated B-scan layers of the sequences of concatenated B-scan layers into a respective sequence of concatenated reduced B-scan layers, by replacing, for each B-scan layer in each of the at least one sequence of concatenated B-scan layers, the sections of the A-scans forming the B-scan layer with corresponding values of an average of A-scan elements in the sections of the A-scans; and

the correlation calculator module is configured to calculate, for each of the at least one sequence of concatenated reduced B-scan layers, a respective rolling window correlation between reduced B-scan layers in the sequence of concatenated reduced B-scan layers and stimulus indicators in the sequence of stimulus indicators by:
calculating, for each stimulus indicator, a product of the stimulus indicator and a respective windowed portion of the sequence of concatenated reduced B-scan layers comprising a reduced B-scan layer which is based on a B-scan that has been generated by the OCT imaging device while the retina was being stimulated in accordance with the stimulus indicator; and
combining the calculated products to generate a two-dimensional array of correlation values indicating the response of a layer of the retina corresponding to the sequence of concatenated reduced B-scan layers to the light stimulus as a function of location in the scanned region of the retina and time.