Phase stability analysis of swept light source with KTa1−xNbxO3 electro-optic deflector toward Doppler optical coherence tomography

2014 ◽  
Author(s):  
Shinya Hasegawa ◽  
Mitsuru Shinagawa ◽  
Seiji Toyoda ◽  
Masahiro Ueno ◽  
Yuzo Sasaki ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Stability Analysis ◽  
Light Source ◽  
Phase Stability ◽  
Optical Coherence ◽  
Electro Optic ◽  
Doppler Optical Coherence Tomography

Doppler optical coherence tomography to monitor the effect of photodynamic therapy on tissue morphology and perfusion

2006 ◽  
Vol 11 (4) ◽  
pp. 044011 ◽  
Author(s):  
Maurice C. G. Aalders ◽  
Martijn Triesscheijn ◽  
Marjan Ruevekamp ◽  
Martijn de Bruin ◽  
Paul Baas ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Photodynamic Therapy ◽  
Optical Coherence ◽  
Tissue Morphology ◽  
Doppler Optical Coherence Tomography

scholarly journals 4D shear stress maps of the developing heart using Doppler optical coherence tomography

2012 ◽  
Vol 3 (11) ◽  
pp. 3022 ◽  
Author(s):  
Lindsy M. Peterson ◽  
Michael W. Jenkins ◽  
Shi Gu ◽  
Lee Barwick ◽  
Michiko Watanabe ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Shear Stress ◽  
Optical Coherence ◽  
Developing Heart ◽  
Doppler Optical Coherence Tomography

scholarly journals Phase stable swept-source optical coherence tomography with active mode-locking laser for contrast enhancements of retinal angiography

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kwan Seob Park ◽  
Eunwoo Park ◽  
Hwidon Lee ◽  
Hyun-Ji Lee ◽  
Sang-Won Lee ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Phase Stability ◽  
Averaging Method ◽  
Mode Locking ◽  
Optical Coherence ◽  
Swept Source ◽  
Active Mode ◽  
Coherent Averaging ◽  
Noise Ratio ◽  
High Phase

AbstractSwept-source optical coherence tomography (SS-OCT) is an attractive high-speed imaging technique for retinal angiography. However, conventional swept lasers vary the cavity length of the laser mechanically to tune the output wavelength. This causes sweep-timing jitter and hence low phase stability in OCT angiography. Here, we improve an earlier phase-stabilized, akinetic, SS-OCT angiography (OCTA) method by introducing coherent averaging. We develop an active mode-locking (AML) laser as a high phase-stable akinetic swept source for the OCTA system. The phase stability of the improved system was analyzed, and the effects of coherent averaging were validated using a retina phantom. The effectiveness of the coherent averaging method was further confirmed by comparing coherently and conventionally averaged en face images of human retinal vasculature for their contrast-to-noise ratio, signal-to-noise ratio, and vasculature connectivity. The contrast-to-noise ratio was approximately 1.3 times larger when applying the coherent averaging method in the human retinal experiment. Our coherent averaging method with the high phase-stability AML laser source for OCTA provides a valuable tool for studying healthy and diseased retinas.

scholarly journals Intra- and Inter-Frame Differential Doppler Optical Coherence Tomography

2015 ◽  
Vol 7 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Tilman Schmoll ◽  
Ioana R. Ivascu ◽  
Amardeep S.G. Singh ◽  
Cedric Blatter ◽  
Rainer A. Leitgeb
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Differential Doppler ◽  
Doppler Optical Coherence Tomography ◽  
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