Visible to the public Biblio

Filters: Keyword is optical coherence tomography  [Clear All Filters]
2018-08-23
Ji, X., Yao, X., Tadayon, M. A., Mohanty, A., Hendon, C. P., Lipson, M..  2017.  High confinement and low loss Si3N4waveguides for miniaturizing optical coherence tomography. 2017 Conference on Lasers and Electro-Optics (CLEO). :1–2.

We show high confinement thermally tunable, low loss (0.27 ± 0.04 dB/cm) Si3N4waveguides that are 42 cm long. We show that this platform can enable the miniaturization of traditionally bulky active OCT components.

2017-03-08
Gómez-Valverde, J. J., Ortuño, J. E., Guerra, P., Hermann, B., Zabihian, B., Rubio-Guivernau, J. L., Santos, A., Drexler, W., Ledesma-Carbayo, M. J..  2015.  Evaluation of speckle reduction with denoising filtering in optical coherence tomography for dermatology. 2015 IEEE 12th International Symposium on Biomedical Imaging (ISBI). :494–497.

Optical Coherence Tomography (OCT) has shown a great potential as a complementary imaging tool in the diagnosis of skin diseases. Speckle noise is the most prominent artifact present in OCT images and could limit the interpretation and detection capabilities. In this work we evaluate various denoising filters with high edge-preserving potential for the reduction of speckle noise in 256 dermatological OCT B-scans. Our results show that the Enhanced Sigma Filter and the Block Matching 3-D (BM3D) as 2D denoising filters and the Wavelet Multiframe algorithm considering adjacent B-scans achieved the best results in terms of the enhancement quality metrics used. Our results suggest that a combination of 2D filtering followed by a wavelet based compounding algorithm may significantly reduce speckle, increasing signal-to-noise and contrast-to-noise ratios, without the need of extra acquisitions of the same frame.