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OCT Scanning and scanner coordinate system schematic. Left: 1D acquisition (A-scan). A single depth profile is acquired which measures backscattered intensity vs. axial dimension (depth). Middle: 2D imaging (B-scan). The OCT beam is scanned in a transverse direction while A-scans (red arrows) are acquired. Right: 3D acquisition. Multiple B-Scans are acquired such that A-scans are sampled on a 2D grid in the transverse plane.
