Imperial College London
Alternate

DrAmandaFoust

Faculty of Engineering, Department of Bioengineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 1055a.foust Website CV

 
 
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Location

 

RSM 4.05Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Quicke:2018:10.1364/BOE.9.003678,
author = {Quicke, P and Reynolds, S and Neil, M and Knopfel, T and Schultz, S and Foust, AJ},
doi = {10.1364/BOE.9.003678},
journal = {Biomedical Optics Express},
pages = {3678--3693},
title = {High speed functional imaging with source localized multifocal two-photon microscopy},
url = {http://dx.doi.org/10.1364/BOE.9.003678},
volume = {9},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multifocal two-photon microscopy (MTPM) increases imaging speed over single-focus scanning by parallelizing fluorescence excitation. The imaged fluorescence’s susceptibility to crosstalk, however, severely degrades contrast in scattering tissue. Here we present a source-localized MTPM scheme optimized for high speed functional fluorescence imaging in scattering mammalian brain tissue. A rastered line array of beamlets excites fluorescence imaged with a complementary metal-oxide-semiconductor (CMOS) camera. We mitigate scattering-induced crosstalk by temporally oversampling the rastered image, generating grouped images with structured illumination, and applying Richardson-Lucy deconvolution to reassign scattered photons. Single images are then retrieved with a maximum intensity projection through the deconvolved image groups. This method increased image contrast at depths up to 112 μm in scattering brain tissue and reduced functional crosstalk between pixels during neuronal calcium imaging. Source-localization did not affect signal-to-noise ratio (SNR) in densely labeled tissue under our experimental conditions. SNR decreased at low frame rates in sparsely labeled tissue, with no effect at frame rates above 50 Hz. Our non-descanned source-localized MTPM system enables high SNR, 100 Hz capture of fluorescence transients in scattering brain, increasing the scope of MTPM to faster and smaller functional signals.
AU  - Quicke,P
AU  - Reynolds,S
AU  - Neil,M
AU  - Knopfel,T
AU  - Schultz,S
AU  - Foust,AJ
DO  - 10.1364/BOE.9.003678
EP  - 3693
PY  - 2018///
SN  - 2156-7085
SP  - 3678
TI  - High speed functional imaging with source localized multifocal two-photon microscopy
T2  - Biomedical Optics Express
UR  - http://dx.doi.org/10.1364/BOE.9.003678
UR  - https://www.osapublishing.org/boe/abstract.cfm?uri=boe-9-8-3678
UR  - http://hdl.handle.net/10044/1/61069
VL  - 9
ER  -
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