Dr. Young-Joo Hong Profile

Dr. Young-Joo Hong

R&D Engineer at Koh Young Technology Inc

SPIE Involvement:

Author

Area of Expertise:

optical coherence tomography , Polarization-sensitive OCT , Doppler OCT , Interferece fringe analysis

Profile Summary

Young-Joo Hong is a postdoctoral researcher at the University of Tsukuba, Japan. He received his Ph. D. in Engineering at the University of Tsukuba in May of 2013. His current main research interest is on the high-speed Jones matrix optical coherence tomography (JM-OCT) and multi-contrast (MC) imaging with simultaneous polarization sensitive and Doppler imaging. And he also has interest in investigation of exudative macular diseases with MC-JM-OCT.

Publications (27)

Proceedings Article | 14 March 2018 Presentation

Presentation

Long working distance OCT for phonomicrosurgery: preliminary observation of 3D microstructure of ex vivo specimens (Conference Presentation)

Jin-Choon Lee, Soo-Geun Wang, Wuisuk Sung, Kyung Un Choi, Hong Ki Kim, Sangyoung Kim, Minkyu Kim, Yongchul Park, Chankwon Lee, Jung Hur, Young-Joo Hong, Jeonghoon Choi, Minyoung Hwangbo, Yuri Koh, Soo-keun Kong

Proceedings Volume 10469, 1046902 (2018) https://doi.org/10.1117/12.2287575

KEYWORDS: Optical coherence tomography, Imaging systems, Microscopes, Visualization, Tissues, 3D microstructuring, In vivo imaging, 3D visualizations, Retina, Skin

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Proceedings Article | 14 March 2018 Presentation

Presentation

Development of attachable phonomicrosurgical OCT device (Conference Presentation)

Jin-Choon Lee, Euisuk Sung, Kyung Un Choi, Hong Ki Kim, Hung Wook Kim, Sangyoung Kim, Choongmin Jung, Young-Joo Hong, Jeonghun Choi, Hyunjong Kim, Sol Kim, Woolim Choi, Jiun Jeon, Mingyoung Hwangbo, Duck Hoon Kang, Sukhoon Park, Minkyu Kim, Seung Tae Kim, Soo-Keun Kong

Proceedings Volume 10469, 1046903 (2018) https://doi.org/10.1117/12.2287582

KEYWORDS: Optical coherence tomography, Microscopes, Diagnostics, In vivo imaging, Solids, Mirrors, Infrared lasers, Visualization, Tissues, Carbon dioxide lasers

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Proceedings Article | 16 May 2017 Presentation

Presentation

Investigation of multiple optical and biometric properties of optic nerve head (Conference Presentation)

Young-Joo Hong, Aaron Chan, Deepa Kasaragod, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 10045, 100450S (2017) https://doi.org/10.1117/12.2250803

KEYWORDS: Biometrics, Optical coherence tomography, Eye, Optic nerve, Birefringence, Signal attenuation, Angiography, Head, Optical properties, Coherence (optics)

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Proceedings Article | 19 April 2017 Presentation

Presentation

Optimization method of superpixel analysis for multi-contrast Jones matrix tomography (Conference Presentation)

Arata Miyazawa, Young-Joo Hong, Shuichi Makita, Deepa Kasaragod, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 10053, 1005307 (2017) https://doi.org/10.1117/12.2254281

KEYWORDS: Image processing, Tomography, Visualization, Optical coherence tomography, Polarization, Statistical analysis, Tissue optics, Tissues, Speckle, Spatial analysis

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Proceedings Article | 17 February 2017 Paper

Paper

High contrast and polarization-artifact-free optical coherence tomography by maximum a-posteriori estimation

Aaron Chan, Young-Joo Hong, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 10053, 100532D (2017) https://doi.org/10.1117/12.2250517

KEYWORDS: Optical coherence tomography, Polarization, Signal to noise ratio, Image analysis, Signal attenuation, Eye, Macula, Vitreous, Birefringence, Sclera, Signal detection, Tissues

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Proceedings Article | 17 February 2017 Paper

Paper

Birefringence and vascular imaging of in vivo human skin by Jones-matrix optical coherence tomography

En Li, Shuichi Makita, Young-Joo Hong, Deepa Kasaragod, Yoshiaki Yasuno

Proceedings Volume 10053, 1005317 (2017) https://doi.org/10.1117/12.2254724

KEYWORDS: Optical coherence tomography, Birefringence, Skin, Phase measurement, In vivo imaging, Dermatology, Collagen, Polarization, Tissues, Imaging systems, Scattering, Tissue optics, Angiography, Tomography

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Proceedings Article | 8 February 2017 Paper

Paper

Evaluation of intraretinal migration of retinal pigment epithelial cells with Jones matrix optical coherence tomography

M. Miura, S. Makita, S. Sugiyama, Y. J. Hong, Y. Yasuno, A. E. Elsner, T. Iwasaki, H. Goto

Proceedings Volume 10045, 100450O (2017) https://doi.org/10.1117/12.2249912

KEYWORDS: Optical coherence tomography, Polarization, Multimodal imaging, Polarimetry, Atrial fibrillation, Sensors, Ophthalmology, Computational imaging, Retina, Standards development

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Proceedings Article | 8 February 2017 Paper

Paper

Motion-corrected en face optical coherence tomography angiography imaging based on the modified Lissajous scanning patter

Yiwei Chen, Young-Joo Hong, Shuichi Makita, Yoshiaki Yasuno

Proceedings Volume 10045, 100450U (2017) https://doi.org/10.1117/12.2250822

KEYWORDS: Optical coherence tomography, Angiography, Eye, Image processing, Blood vessels, Image segmentation, Detection and tracking algorithms, Image processing algorithms and systems, Image registration, Data processing, Distortion

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Proceedings Article | 27 April 2016 Presentation

Presentation

Depth-resolved photothermal optical coherence tomography by local optical path length change measurement (Conference Presentation)

Shuichi Makita, Young-Joo Hong, En Li, Yoshiaki Yasuno

Proceedings Volume 9710, 97101D (2016) https://doi.org/10.1117/12.2209432

KEYWORDS: Optical coherence tomography, Tissue optics, Modulation, Tissues, Refractive index, Absorption, Photothermal effect, Phase measurement, Fiber coupled lasers, Diodes

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Proceedings Article | 8 March 2016 Paper

Paper

Accurate and quantitative polarization-sensitive OCT by unbiased birefringence estimator with noise-stochastic correction

Deepa Kasaragod, Satoshi Sugiyama, Yasushi Ikuno, David Alonso-Caneiro, Masahiro Yamanari, Shinichi Fukuda, Tetsuro Oshika, Young-Joo Hong, En Li, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 9697, 96971I (2016) https://doi.org/10.1117/12.2214527

KEYWORDS: Optical coherence tomography, Eye, Birefringence, Polarization, Signal to noise ratio, Optical calibration, Stochastic processes, Mathematical modeling, Monte Carlo methods, Numerical simulations, Error analysis, Skin, Neodymium, Ophthalmology, Tissues, Ions

Read Abstract +

Polarization sensitive optical coherence tomography (PS-OCT) is a functional extension of OCT that contrasts the polarization properties of tissues. It has been applied to ophthalmology, cardiology, etc. Proper quantitative imaging is required for a widespread clinical utility. However, the conventional method of averaging to improve the signal to noise ratio (SNR) and the contrast of the phase retardation (or birefringence) images introduce a noise bias offset from the true value. This bias reduces the effectiveness of birefringence contrast for a quantitative study. Although coherent averaging of Jones matrix tomography has been widely utilized and has improved the image quality, the fundamental limitation of nonlinear dependency of phase retardation and birefringence to the SNR was not overcome. So the birefringence obtained by PS-OCT was still not accurate for a quantitative imaging.

The nonlinear effect of SNR to phase retardation and birefringence measurement was previously formulated in detail for a Jones matrix OCT (JM-OCT) [1]. Based on this, we had developed a maximum a-posteriori (MAP) estimator and quantitative birefringence imaging was demonstrated [2]. However, this first version of estimator had a theoretical shortcoming. It did not take into account the stochastic nature of SNR of OCT signal.

In this paper, we present an improved version of the MAP estimator which takes into account the stochastic property of SNR. This estimator uses a probability distribution function (PDF) of true local retardation, which is proportional to birefringence, under a specific set of measurements of the birefringence and SNR. The PDF was pre-computed by a Monte-Carlo (MC) simulation based on the mathematical model of JM-OCT before the measurement. A comparison between this new MAP estimator, our previous MAP estimator [2], and the standard mean estimator is presented. The comparisons are performed both by numerical simulation and in vivo measurements of anterior and posterior eye segment as well as in skin imaging. The new estimator shows superior performance and also shows clearer image contrast.

Proceedings Article | 8 March 2016 Presentation + Paper

Presentation + Paper

Noise-immune complex correlation for vasculature imaging based on standard and Jones-matrix optical coherence tomography

Shuichi Makita, Kazuhiro Kurokawa, Young-Joo Hong, En Li, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 9697, 96970J (2016) https://doi.org/10.1117/12.2214683

KEYWORDS: Optical coherence tomography, Polarization, Angiography, In vivo imaging, Coherence (optics), Computing systems, Eye, Tissues, Doppler tomography, Signal to noise ratio, Signal detection

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Proceedings Article | 8 March 2016 Presentation + Paper

Presentation + Paper

Quantitative optical coherence tomography by maximum a-posteriori estimation of signal intensity

Aaron Chan, Kazuhiro Kurokawa, Shuichi Makita, Young-Joo Hong, Arata Miyazawa, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 9697, 96971W (2016) https://doi.org/10.1117/12.2212329

KEYWORDS: Optical coherence tomography, Signal attenuation, Tissues, Statistical analysis, Light scattering, Retinal scanning, Birefringence, Scattering, Optical properties, Retina, Signal to noise ratio, Reliability, Polarization, Composites, Vitreous, Optic nerve

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Proceedings Article | 4 March 2016 Presentation + Paper

Presentation + Paper

Quantitative polarization and flow evaluation of choroid and sclera by multifunctional Jones matrix optical coherence tomography

S. Sugiyama, Y.-J. Hong, D. Kasaragod, S. Makita, M. Miura, Y. Ikuno, Y. Yasuno

Proceedings Volume 9693, 96930M (2016) https://doi.org/10.1117/12.2212151

KEYWORDS: Birefringence, Polarization, Optical coherence tomography, Sclera, Tissues, Scattering, Eye, Tissue optics, Diagnostics, Image segmentation, Image visualization, Optical properties

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Proceedings Article | 4 March 2016 Presentation + Paper

Presentation + Paper

Eye motion corrected OCT imaging with Lissajous scan pattern

Young-Joo Hong, Yiwei Chen, En Li, Masahiro Miura, Shuichi Makita, Yoshiaki Yasuno

Proceedings Volume 9693, 96930P (2016) https://doi.org/10.1117/12.2212227

KEYWORDS: Optical coherence tomography, Eye, Coherence imaging, Algorithm development, Image registration, Distortion, Raster graphics, 3D metrology, Motion measurement, 3D acquisition, Data acquisition

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Proceedings Article | 29 February 2016 Presentation + Paper

Presentation + Paper

Three-dimensional multifunctional optical coherence tomography for skin imaging

En Li, Shuichi Makita, Young-Joo Hong, Deepa Kasaragod, Tomoko Sasaoka, Masahiro Yamanari, Satoshi Sugiyama, Yoshiaki Yasuno

Proceedings Volume 9689, 96890N (2016) https://doi.org/10.1117/12.2212284

KEYWORDS: Optical coherence tomography, Skin, Polarization, Birefringence, Tissues, Tissue optics, 3D image processing, Tomography, Collagen, In vivo imaging

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Proceedings Article | 4 March 2014 Paper

Paper

Quantitative two-dimensional micro-displacement measurement by optical coherence tomography

Kazuhiro Kurokawa, Shuichi Makita, Young-Joo Hong, Yoshiaki Yasuno

Proceedings Volume 8934, 89340V (2014) https://doi.org/10.1117/12.2038643

KEYWORDS: Optical coherence tomography, Laser irradiation, Doppler tomography, Optical testing, Doppler effect, Tissues, Laser tissue interaction, Laser applications, Visualization, Mirrors

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Proceedings Article | 4 March 2014 Paper

Paper

Toward absorption contrast imaging of biological tissues in vivo by using photothermal optical coherence tomography

Shuichi Makita, Young-Joo Hong, Yoshiaki Yasuno

Proceedings Volume 8934, 893434 (2014) https://doi.org/10.1117/12.2040262

KEYWORDS: Optical coherence tomography, Absorption, In vivo imaging, Tissues, Imaging systems, Modulation, Liver, Tissue optics, Laser beam diagnostics, Phase shifts

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Proceedings Article | 28 February 2014 Paper

Paper

Five-dimensional analysis of multi-contrast Jones matrix tomography of posterior eye

Udaya Bhaskar, Young-Joo Hong, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 8930, 893008 (2014) https://doi.org/10.1117/12.2036587

KEYWORDS: Optical coherence tomography, Tissues, Doppler effect, Scattering, Tissue optics, Eye, Optical properties, Polarization, Image analysis, Doppler tomography

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Proceedings Article | 28 February 2012 Paper

Paper

Office based multi-functional anterior eye segment optical coherence tomography

Yiheng Lim, Masahiro Yamanari, Young-Joo Hong, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno

Proceedings Volume 8214, 82140Y (2012) https://doi.org/10.1117/12.907707

KEYWORDS: Doppler tomography, Optical coherence tomography, Eye, Polarization, Blood vessels, Tissues, Signal detection, In vivo imaging, Inflammation, Birefringence

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SPIE Journal Paper | 1 January 2009 Open Access

Open Access

Automated retinal shadow compensation of optical coherence tomography images

Tapio Fabritius, Shuichi Makita, Yongjoo Hong, Risto Myllylä, Yoshiaki Yasuno

JBO, Vol. 14, Issue 01, 010503, (January 2009) https://doi.org/10.1117/12.10.1117/1.3076204

KEYWORDS: Optical coherence tomography, Image segmentation, 3D image processing, Angiography, Optical discs, Signal attenuation, Time metrology, Macula, Numerical analysis, In vivo imaging

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Proceedings Article | 25 February 2008 Paper

Paper

High-penetration imaging of retinal and choroidal pathologies by 1 μm swept-source OCT and optical coherence angiography

Yoshiaki Yasuno, Masahiro Miura, Fumiki Okamoto, Youngjoo Hong

Proceedings Volume 6844, 68441H (2008) https://doi.org/10.1117/12.762548

KEYWORDS: Optical coherence tomography, Angiography, Sclera, Pathology, Coherence (optics), Visualization, Eye, Tissue optics, Retinal scanning, Biomedical optics

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Proceedings Article | 18 February 2008 Paper

Paper

Numerical method for compensating the retinal shadows of optical coherence tomography images

Tapio Fabritius, Shuichi Makita, Youngjoo Hong, Risto Myllylä, Toyohiko Yatagai, Yoshiaki Yasuno

Proceedings Volume 6847, 68472A (2008) https://doi.org/10.1117/12.765395

KEYWORDS: Optical coherence tomography, Image segmentation, Absorption, Numerical analysis, Image resolution, 3D metrology, Eye, Optical resolution, 3D image processing, Doppler tomography

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Proceedings Article | 11 July 2007 Paper

Paper

Optical coherence angiography for the retina and choroid

Shuichi Makita, Youngjoo Hong, Masahiro Miura, Masahiro Yamanari, Toyohiko Yatagai, Yoshiaki Yasuno

Proceedings Volume 6627, 66271O (2007) https://doi.org/10.1117/12.728077

KEYWORDS: Angiography, Image segmentation, Optical coherence tomography, 3D image processing, Coherence (optics), Doppler effect, Retina, Blood circulation, Doppler tomography, Reflectivity

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Proceedings Article | 11 July 2007 Paper

Paper

Scattering optical coherence angiography with 1-um swept source optical coherence tomography

Yoshiaki Yasuno, Youngjoo Hong, Shuichi Makita, Masahiro Akiba, Masahiro Miura, Toyohiko Yatagai

Proceedings Volume 6627, 66271N (2007) https://doi.org/10.1117/12.727981

KEYWORDS: Optical coherence tomography, Scattering, Coherence (optics), 3D metrology, In vivo imaging, Light sources, Angiography, Visualization, 3D image processing, Algorithm development

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Proceedings Article | 5 March 2007 Paper

Paper

Phase-insensitive optical coherence angiography

Youngjoo Hong, Shuichi Makita, Masahiro Yamanari, Masahiro Miura, Soohyun Kim, Toyohiko Yatagai, Yoshiaki Yasuno

Proceedings Volume 6426, 64260A (2007) https://doi.org/10.1117/12.698792

KEYWORDS: Image segmentation, Angiography, Coherence (optics), Optical coherence tomography, 3D image processing, Doppler tomography, Binary data, Eye, Tissues, Phase measurement

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Proceedings Article | 7 February 2007 Paper

Paper

Phase-insensitive optical coherence angiography of the choroid by 1-micrometer band swept-source optical coherence tomography

Yoshiaki Yasuno, Youngjoo Hong, Shuichi Makita, Masahiro Miura, Toyohiko Yatagai

Proceedings Volume 6429, 642905 (2007) https://doi.org/10.1117/12.702672

KEYWORDS: Optical coherence tomography, Visualization, Angiography, Coherence (optics), Image segmentation, In vivo imaging, Light sources, Eye, Algorithm development, Optical filters

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Proceedings Article | 7 February 2007 Paper

Paper

Optical coherence angiography for the human eye

Shuichi Makita, Youngjoo Hong, Masahiro Yamanari, Toyohiko Yatagai, Yoshiaki Yasuno

Proceedings Volume 6429, 64290C (2007) https://doi.org/10.1117/12.702634

KEYWORDS: Angiography, Optical coherence tomography, Doppler effect, 3D image processing, Eye, Image segmentation, Coherence (optics), Retinal scanning, Visualization, Blood circulation

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Showing 5 of 27 publications

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