Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes

Chao Tian; Wei Zhang; Van Phuc Nguyen; Xueding Wang; Yannis M. Paulus

doi:10.3791/57135

Yaşam tavşan gözünde roman Photoacoustic mikroskobu ve optik Koherens tomografi çift-modality Cho...

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Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes

Yaşam tavşan gözünde roman Photoacoustic mikroskobu ve optik Koherens tomografi çift-modality Chorioretinal görüntüleme

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09:20 min

February 8, 2018

DOI: 10.3791/57135-v

Chao Tian¹, Wei Zhang^2,3, Van Phuc Nguyen¹, Xueding Wang^2,4, Yannis M. Paulus^1,2

¹Kellogg Eye Center, Department of Ophthalmology and Visual Sciences,University of Michigan, ²Department of Biomedical Engineering,University of Michigan, ³Institute of Biomedical Engineering,Chinese Academy of Medical Sciences & Peking Union Medical College, ⁴Department of Radiology,University of Michigan

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Overview

This manuscript describes a novel setup and operating procedure for a dual-modality system combining photoacoustic microscopy and optical coherence tomography. This system enables noninvasive, label-free chorioretinal imaging of larger animals, such as rabbits.

Key Study Components

Area of Science

Ophthalmic Imaging
Photoacoustic Microscopy
Optical Coherence Tomography

Background

Importance of imaging depth and resolution in ocular studies.
Challenges in clinical translation for larger mammals.
Need for noninvasive techniques in ocular tissue visualization.
Potential to discern oxygen saturation and blood distribution.

Purpose of Study

To develop a dual-modality imaging system for chorioretinal analysis.
To enhance understanding of ocular tissue characteristics.
To facilitate research in larger animal models.

Methods Used

Utilization of an optical parametric oscillator laser as the light source.
Implementation of a beam splitter with a specific split ratio.
Raster scanning of the beam using a two-dimensional galvanometer.
Focusing the beam on the fundus through specialized optics.

Main Results

Successful acquisition of dual-modality images of ocular tissues.
Demonstrated noninvasive visualization capabilities.
Provided insights into imaging depth and resolution.
Facilitated analysis of oxygen saturation and blood distribution.

Conclusions

The dual-modality system is effective for chorioretinal imaging.
Noninvasive techniques can significantly advance ophthalmic research.
This method holds promise for clinical applications in larger mammals.

Frequently Asked Questions

What is the significance of dual-modality imaging?

Dual-modality imaging combines the strengths of photoacoustic microscopy and optical coherence tomography, enhancing the depth and detail of ocular imaging.

How does this method improve upon traditional imaging techniques?

This method allows for noninvasive and label-free imaging, which can provide more accurate assessments of ocular tissues without the need for dyes or contrast agents.

What types of animals were used in this study?

The study primarily focused on larger mammals, specifically rabbits, to evaluate the effectiveness of the imaging system.

What are the potential clinical applications of this research?

The findings could lead to improved diagnostic techniques for ocular diseases in larger animals and potentially in humans.

What challenges does this imaging technique address?

It addresses challenges related to imaging depth, resolution, and the need for noninvasive methods in ocular research.

How does the system differentiate between various tissue types?

The dual-modality system can discern differences in oxygen saturation, blood distribution, and melanin content in ocular tissues.

Bu el yazması roman kurulum ve işletim photoacoustic mikroskobu ve optik Koherens tomografi çift-modalite sistem noninvaziv, etiket içermeyen chorioretinal görüntüleme tavşan gibi daha büyük hayvanlar için yordamı açıklar.

Bu yeni görüntüleme kurulumunun ve çalıştırma prosedürünün genel amacı, tavşanlar gibi daha büyük memelilerin gözlerinin non-invaziv, etiketsiz koryoretinal görüntülemesi için fotoakustik mikroskopi ve optik koherens tomografi çift modalitesi gerçekleştirmektir. Bu yöntem, oftalmik görüntülemede, daha büyük hayvanlarda oksijen doygunluğunu, kan dağılımını ve melanini ayırt etmek için gereken görüntüleme derinliği, çözünürlük ve klinik çeviri hakkındaki temel soruların yanıtlanmasına yardımcı olabilir. Bu tekniğin en büyük avantajı, fotoakustik mikroskopi ve optik koherens tomografi çift modaliteli görüntülerin elde edilmesi için oküler dokunun noninvaziv görüntülenmesine izin vermesidir.

Başlamak için, fotoakustik mikroskop için ışık kaynağı olarak bir diyot pompalı katı hal lazeri tarafından pompalanan bir optik parametrik osilatör lazeri seçin ve kolon destekli ışını 19 yansımaya 10 iletim bölme oranıyla bölmek için bir ışın ayırıcı kullanın. Yansıyan kısmı M3 ayna ve dikroik ayna tarafından art arda saptırın ve yansımayı raster taramak için iki boyutlu bir galvanometre kullanın. Taranan ışını, odak uzaklığı 36 milimetre olan taranmış bir mercek ve odak uzaklığı 10 milimetre olan oftalmik mercekten oluşan bir teleskoptan geçirin ve ışını tavşan gözü optiği ile fundusa odaklayın.

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