Dr. Kari V. Vienola Profile

Dr. Kari V. Vienola

Postdoctoral Scholar at Univ of Turku

Area of Expertise:

Ophthalmic Imaging , Optoretinography , Adaptive Optics , Eye tracking , Optical coherence tomography , Scanning laser ophthalmoscopy

Currently working in the lab of Dr. Ravi Jonnal where we focus on developing new approaches to optoretinography.

Proceedings Article | 8 April 2024 Presentation

Human cone response models for optoretinography with F-SS-OCT and adaptive optics

Ewelina Pijewska, Denise Valente, Kari Vienola, Ratheesh Meleppat, Robert Zawadzki, Ravi Jonnal

Proceedings Volume PC12824, PC128240J (2024) https://doi.org/10.1117/12.3003156

KEYWORDS: Modeling, Adaptive optics, Motion models, Carbon monoxide, Visualization, Diseases and disorders, Biomedical applications, Adaptive optics optical coherence tomography

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Proceedings Article | 13 March 2024 Presentation

Open-source software and wavefront sensor design for closed-loop adaptive optics control for high-resolution retinal imaging

Maciej Bartuzel, Kari Vienola, Denise Valente, Ewelina Pijewska, Reddikumar Maddipatla, Robert Zawadzki, Ravi Jonnal

Proceedings Volume PC12824, PC128240C (2024) https://doi.org/10.1117/12.3002952

KEYWORDS: Adaptive optics, Open source software, Retinal scanning, Adaptive control, Wavefront sensors, Software development, Design and modelling, Optical coherence tomography, CMOS sensors, Wavefront analysis

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Proceedings Article | 13 March 2024 Presentation + Paper

Exploring optoretinographic responses of photoreceptor function in disease-affected retinas

Reddikumar Maddipatla, Christopher Langlo, Kari Vienola, Maciej Bartuzel, Ewelina Pijewska, Robert Zawadzki, Ravi Jonnal

Proceedings Volume 12824, 1282406 (2024) https://doi.org/10.1117/12.3003007

KEYWORDS: Optical coherence tomography, Retina, Eye, Visualization, Adaptive optics, Signal attenuation, Retinal diseases, Genetics, Data processing, Attenuation

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Proceedings Article | 17 March 2023 Presentation

Clinical optoretinography using OCT phase velocity

Reddikumar Maddipatla, Kari Vienola, Robert Zawadzki, Ravi Jonnal

Proceedings Volume PC12360, PC123600C (2023) https://doi.org/10.1117/12.2649401

KEYWORDS: Optical coherence tomography, Phase velocity, Adaptive optics, Visualization, Velocity measurements, Retina, Optical signal processing, Aberration correction, Numerical integration

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Proceedings Article | 9 March 2023 Presentation

Theoretical and practical considerations in translational optoretinography

Ravi Jonnal, Reddikumar Maddipatla, Kari Vienola, Denise Valente, Robert Zawadzki

Proceedings Volume PC12367, PC1236707 (2023) https://doi.org/10.1117/12.2652250

KEYWORDS: Optical coherence tomography, Temporal resolution, Signal to noise ratio, Phase velocity, Optical tracking, Neurons, Macula, Coherence imaging

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Proceedings Article | 7 March 2022 Presentation

Full-field swept source optical coherence tomography (FF-SS-OCT) system for in vivo evaluation of light evoked activation of photoreceptors (optoretinography) in mice

Robert Zawadzki, Denise Valente, Ratheesh Meleppat, Kari Vienola, Sarah Karlen, Pengfei Zhang, Ravi Jonnal, Nathan Doble

Proceedings Volume PC11941, PC119410G (2022) https://doi.org/10.1117/12.2609714

KEYWORDS: Optical coherence tomography, Light, In vivo imaging, Retinal scanning, Image resolution, Visible radiation, Raster graphics, Optical testing, Ophthalmology, Multichannel imaging systems

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Proceedings Article | 9 December 2021 Paper

Progress in measurements and interpretation of light-evoked retinal function using OCT based optoretinography (ORG)

Robert Zawadzki, Pengfei Zhang, Ewelina Pijewska, Denise Valente, Ratheesh Meleppat, Kari Vienola, Sarah Karlen, M. Szkulmowski, John Werner, Edward Pugh, Ravi Jonnal

Proceedings Volume 11924, 119240M (2021) https://doi.org/10.1117/12.2616045

KEYWORDS: Optical coherence tomography, Data acquisition, Retinal scanning, Retina, Ophthalmology, Neurons, Tissue optics, Scattering, Standards development, Physics

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Proceedings Article | 7 December 2021 Paper

Enhancing contrast of in-vivo human retinal ganglion cells with multi-offset adaptive optics scanning laser ophthalmoscope

Elena Gofas-Salas, Yuhua Rui, Pedro Mecê, Min Zhang, Valerie Snyder, Kari Vienola, Daniel Lee, José-Alain Sahel, Ethan Rossi, Kate Grieve

Proceedings Volume 11919, 119191C (2021) https://doi.org/10.1117/12.2614847

KEYWORDS: In vivo imaging, Adaptive optics, Scanning laser ophthalmoscopes, Scanning laser ophthalmoscopy, Retina, Imaging systems, Eye, Signal to noise ratio, Phase contrast, Ophthalmology

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Proceedings Article | 5 March 2021 Presentation

Evaluation of effects the ocular metrics (eye movements and ocular aberrations) have on image quality of in vivo retinal optical coherence tomography angiography (OCTA)

Kari Vienola, Denise Valente, John Werner, Ravi Jonnal, Robert Zawadzki

Proceedings Volume 11630, 116300O (2021) https://doi.org/10.1117/12.2579182

KEYWORDS: Eye, Angiography, Optical coherence tomography, In vivo imaging, Image quality, Data acquisition, Wavefronts, Wavefront sensors, Visualization, Systems modeling

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Proceedings Article | 5 March 2021 Presentation

A retinal full-field swept-source optical coherence tomography and flood imaging system with hardware adaptive optics

Denise Valente, Kari Vienola, John Werner, Robert Zawadzki, Ravi Jonnal

Proceedings Volume 11630, 116300F (2021) https://doi.org/10.1117/12.2583905

KEYWORDS: Adaptive optics, Imaging systems, Optical coherence tomography, Floods, Cones, Retina, Aberration correction, Wavefront sensors, Signal to noise ratio, Retinal scanning

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Proceedings Article | 19 February 2020 Presentation + Paper

Investigating the functional response of human cones and rods with a combined adaptive optics SLO-OCT system

Mehdi Azimipour, Denise Valente, Kari Vienola, John Werner, Robert Zawadzki, Ravi Jonnal

Proceedings Volume 11218, 1121813 (2020) https://doi.org/10.1117/12.2544462

KEYWORDS: Optical coherence tomography, Scanning laser ophthalmoscopy, Cones, Rods, Reflectivity, Adaptive optics, Imaging systems, Adaptive optics optical coherence tomography, Eye, Image segmentation

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Proceedings Article | 26 April 2016 Presentation

Parallel scanning light ophthalmoscope for retinal imaging (Conference Presentation)

Kari Vienola, Mathivanan Damodaran, Boy Braaf, Koenraad Vermeer, Johannes de Boer

Proceedings Volume 9693, 96930R (2016) https://doi.org/10.1117/12.2205247

KEYWORDS: Retinal scanning, Confocal microscopy, Retina, Digital micromirror devices, Scanning laser ophthalmoscopy, Eye, Image acquisition, High speed imaging, Micromirrors, Cameras

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