Axial resolution improvement in spectral domain optical coherence tomography using a depth-adaptive maximum-a-posterior framework

2015 ◽  
Author(s):  
Ameneh Boroomand ◽  
Bingyao Tan ◽  
Alexander Wong ◽  
Kostadinka Bizheva
Keyword(s):  
Optical Coherence Tomography ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Axial Resolution ◽  
Resolution Improvement ◽  
Maximum A Posterior

scholarly journals Numerical-Sampling-Functionalized Real-Time Index Regulation for Direct k-Domain Calibration in Spectral Domain Optical Coherence Tomography

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 182 ◽  
Author(s):  
Sangyeob Han ◽  
Oeon Kwon ◽  
Ruchire Wijesinghe ◽  
Pilun Kim ◽  
Unsang Jung ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Real Time ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Axial Resolution ◽  
Dependent Signal ◽  
Nonlinear Sampling ◽  
Time Linear ◽  
Optical Laser ◽  
Sd Oct

An index-regulation technique functionalized by numerical sampling for direct calibration of the non-linear wavenumber (k)-domain to a linear domain in spectral domain optical coherence tomography (SD-OCT) is proposed. The objective of the developed method is to facilitate high-resolution identification of microstructures in biomedical imaging. Subjective optical alignments caused by nonlinear sampling of interferograms in the k-domain tend to hinder depth-dependent signal-to-noise ratios (SNR) and axial resolution in SD-OCT. Moreover, the optical-laser-dependent k-domain requires constant recalibrated in accordance with each laser transition, thereby necessitating either hardware or heavy software compensations. As the key feature of the proposed method, a relatively simple software-based k-domain mask calibration technique was developed to enable real-time linear sampling of k-domain interpolations whilst facilitating image observation through use of an index-regulation technique. Moreover, it has been confirmed that dispersion can be simultaneously compensated with noise residuals generated using the proposed technique, and that use of complex numerical or hardware techniques are no longer required. Observed results, such as fall-off, SNR, and axial resolution clearly exhibit the direct impact of the proposed technique, which could help investigators rapidly achieve optical-laser-independent high-quality SD-OCT images.

scholarly journals Optimization for Axial Resolution, Depth Range, and Sensitivity of Spectral Domain Optical Coherence Tomography at 1.3 ¥ìm

2009 ◽  
Vol 55 (6) ◽  
pp. 2354-2360 ◽  
Author(s):  
Sang-Won Lee ◽  
Hyun-Woo Jeong ◽  
Yeh-Chan Ahn ◽  
Woonggyu Jung ◽  
Zhongping Chen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Spectral Domain ◽  
Depth Range ◽  
Optical Coherence ◽  
Axial Resolution

scholarly journals Effects of axial resolution improvement on optical coherence tomography (OCT) imaging of gastrointestinal tissues

2008 ◽  
Vol 16 (4) ◽  
pp. 2469 ◽  
Author(s):  
Yu Chen ◽  
Aaron D. Aguirre ◽  
Pei-Lin Hsiung ◽  
Shu-Wei Huang ◽  
Hiroshi Mashimo ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Axial Resolution ◽  
Resolution Improvement ◽  
Oct Imaging
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