Influence of coherence length, signal-to-noise ratio, log transform, and low-pass filtering on layer thickness assessment with OCT in the retinaJansonius, N. M., Cervantes, J., Reddikumar, M. & Cense, B., 1-Nov-2016, In : Biomedical optics express. 7, 11, p. 4490-4500 11 p.
Research output: Contribution to journal › Article › Academic › peer-review
Optical coherence tomography (OCT) images of the retina are inevitably affected by the finite width of the coherence function and noise. To make low-reflective layers visible, the raw OCT signal is log transformed; to reduce the effect of noise the images can be low-pass filtered. We determined the effects of these operations on layer thickness assessment, as a function of signal-to-noise ratio (SNR), by performing measurements in a phantom eye and modeling. The log transform appeared to be the key factor in a SNR-dependent overestimation of peak widths and a less predictive bias in the widths of low-reflective layers. (C) 2016 Optical Society of America
|Number of pages||11|
|Journal||Biomedical optics express|
|Publication status||Published - 1-Nov-2016|
- NERVE-FIBER-LAYER, TOMOGRAPHY, SEGMENTATION, CATARACT, GLAUCOMA, REMOVAL, IMAGES