1. Heartbeat-induced axial motion artifacts in optical coherence tomography measurements of the retina

    Heartbeat-induced axial motion artifacts in optical coherence tomography measurements of the retina
    Purpose: To investigate the cause of axial eye motion artifacts that occur in optical coherence tomography (OCT) imaging of the retina. Understanding the cause of these motions can lead to improved OCT image quality and therefore better diagnosis. Methods: 27 measurements were done on 5 subjects. We collected spectral-domain OCT images at the macula over periods up to 30 seconds. We calculated the axial shift of every average A-scan with respect to the previous average A-scan by calculating the cross-correlation. The frequency spectrum of the calculated shifts versus time was determined. The heart rate was determined from blood pressure measurements ...
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