1. Aligning scan locations from consecutive spectral-domain optical coherence tomography examinations: a comparison among different strategies

    Aligning scan locations from consecutive spectral-domain optical coherence tomography examinations: a comparison among different strategies

    Purpose: To compare intrasession repeatability values produced by different spectral-domain optical coherence tomography (SD-OCT) instruments when measuring macular retinal thickness from consecutive examinations. Methods: A total of 40 eyes from 23 healthy subjects and 47 eyes from 42 patients with macular edema were enrolled in the study. Subjects underwent two consecutive SD-OCT examinations using three instruments: Spectralis HRA+OCT (Heidelberg Engineering, Heidelberg, Germany), Cirrus (Carl Zeiss Meditec Inc., Dublin, CA, USA), and RS 3000 (Nidek, Gamagori, Japan). For the second SD-OCT examination, the scan location was aligned to the baseline exam using different strategies: (1) RS 3000 eye-tracking (pre-acquisition), (2 ...

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