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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Clin Perinatol. 2013 Jun;40(2):271–296. doi: 10.1016/j.clp.2013.02.007

Fig. 10.

Fig. 10

SDOCT color Doppler imaging in a 42-week-old PMA infant. The volumetric scan was of 5 × 5 mm, 500 A-scans/B-scan, 40 B-scans and 5 Doppler samples (5 repeated A-scans at each single A-scan point). The B-scans shown were located in zone I across the temporal/superior vascular arcades. (Left) B-scan distal to the optic nerve. Red and blue represent vascular flow in opposite directions with respect to the OCT beam. (Right) B-scan more proximal to the optic nerve. Red and blue rings are produced by increased flow velocity. At higher flow velocities, the Doppler signal disappears, a phenomenon known as washout effect.