Advancing the path to in-vivo imaging in freely moving mice via multimode-multicore fiber based holographic endoscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F24%3A00598854" target="_blank" >RIV/68081731:_____/24:00598854 - isvavai.cz</a>

Result on the web

<a href="https://www.spiedigitallibrary.org/journals/neurophotonics/volume-11/issue-S1/S11506/Advancing-the-path-to-in-vivo-imaging-in-freely-moving/10.1117/1.NPh.11.S1.S11506.full" target="_blank" >https://www.spiedigitallibrary.org/journals/neurophotonics/volume-11/issue-S1/S11506/Advancing-the-path-to-in-vivo-imaging-in-freely-moving/10.1117/1.NPh.11.S1.S11506.full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/1.NPh.11.S1.S11506" target="_blank" >10.1117/1.NPh.11.S1.S11506</a>

Result language

angličtina

Original language name

Advancing the path to in-vivo imaging in freely moving mice via multimode-multicore fiber based holographic endoscopy

Original language description

Significance Hair-thin multimode optical fiber-based holographic endoscopes have gained considerable interest in modern neuroscience for their ability to achieve cellular and even subcellular resolution during in-vivo deep brain imaging. However, the application of multimode fibers in freely moving animals presents a persistent challenge as it is difficult to maintain optimal imaging performance while the fiber undergoes deformations. Aim We propose a fiber solution for challenging in-vivo applications with the capability of deep brain high spatial resolution imaging and neuronal activity monitoring in anesthetized as well as awake behaving mice. Approach We used our previously developed (MCF)-C-3 multimode-multicore fiber to record fluorescently labeled neurons in anesthetized mice. Our (MCF)-C-3 exhibits a cascaded refractive index structure, enabling two distinct regimes of light transport that imitate either a multimode or a multicore fiber. The (MCF)-C-3 has been specifically designed for use in the initial phase of an in-vivo experiment, allowing for the navigation of the endoscope's distal end toward the targeted brain structure. The multicore regime enables the transfer of light to and from each individual neuron within the field of view. For chronic experiments in awake behaving mice, it is crucial to allow for disconnecting the fiber and the animal between experiments. Therefore, we provide here an effective solution and establish a protocol for reconnection of two segments of (MCF)-C-3 with hexagonally arranged corelets. Results We successfully utilized the (MCF)-C-3 to image neurons in anaesthetized transgenic mice expressing enhanced green fluorescent protein. Additionally, we compared imaging results obtained with the (MCF)-C-3 with larger numerical aperture (NA) fibers in fixed whole-brain tissue. Conclusions This study focuses on addressing challenges and providing insights into the use of multimode-multicore fibers as imaging solutions for in-vivo applications. We suggest that the upcoming version of the (MCF)-C-3 increases the overall NA between the two cladding layers to allow for access to high resolution spatial imaging. As the NA increases in the multimode regime, the fiber diameter and ring structure must be reduced to minimize the computational burden and invasiveness.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/EF15_003%2F0000476" target="_blank" >EF15_003/0000476: Holographic endoscopy for in vivo applications</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Neurophotonics

ISSN

2329-423X

e-ISSN

2329-4248

Volume of the periodical

11

Issue of the periodical within the volume

S1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

S11506

UT code for WoS article

001316474200004

EID of the result in the Scopus database

2-s2.0-85204905319