Correction of decorrelation tail artifacts in a whole OCT-A volume

A method for correcting decorrelation tail artifacts in optical coherence tomography (OCT) angiography volumetric data of an eye, said method comprising:

• collecting three dimensional OCT data of the eye using an OCT system;
• calculating motion contrast information in the three dimensional OCT data using an OCT angiography (OCT-A) processing technique to obtain the OCT-A volumetric data containing the decorrelation tail artifacts;
• defining a target subvolume within the OCT-A volumetric data, the target subvolume having an axial depth and being axially moveable within the OCT-A volumetric data;
• moving the target subvolume in discrete axial steps within the OCT-A volumetric data, and at each axial step:
• (a) defining a reference subvolume corresponding to a depth location in the OCT-A volumetric data axially offset from the target subvolume;
• (b) defining corrected OCT-A data that corrects for decorrelation tail artifacts in the target subvolume using information in the reference subvolume and information in the target subvolume;
• and
• displaying or storing the corrected OCT-A data or a further analysis thereof.