The Rockefeller University

University of Vienna

Alipasha Vaziri

Tobias Noebauer

Oliver Skocek

Siegfried Weisenburger

A multi-photon imaging system includes a laser module having a first channel for outputting a two-photon excitation laser pulse and a second channel for outputting a three-photon excitation laser pulse. The system further includes a first optical path for guiding the two-photon laser pulse from the first channel of the laser module and a second optical path for guiding the three-photon laser pulse from the second channel of the laser module. A microscope is also provided for simultaneously receiving the two-photon laser pulse from the first optical path and the three-photon laser pulse from the second optical path, and simultaneously, or with well controllable delays, delivering the two-photon laser pulse and the three-photon pulse to a target volume. The system further includes a photodetector configured to collect photons generated within the target volume in response to simultaneous excitation of the target volume by both the two-photon laser pulse and the three-photon laser pulse.

Hybrid multi-photon microscopy

A tissue imaging system includes a laser module for outputting a laser pulse, an optical delay module configured to split a laser pulse received from the laser module into a plurality of time-delayed sub-pulses, a telescope for delivering the sub-pulses from the optical delay module to a target volume and a photodetector configured to collect photons generated within the target volume in response to excitation of the target volume by the first and second sub-pulses. The system may further include a spatial multiplexing module configured to receive the temporally multiplexed laser pulse from the optical delay module and splitting the temporally multiplexed laser pulse into a plurality of sub-beams including a first sub-beam and a second sub-beam, wherein the first sub-beam and the second sub-beam are spatially separated with respect to a first image plane formed at a first depth within the target volume and with respect to a second image plane formed at a second depth within the target volume.

High speed deep tissue imaging system using multiplexed scanned temporal focusing

An imaging signal extraction apparatus comprising: an interface; a processing device, the processing device operatively coupled to the interface; and a computer readable medium comprising instructions that, when executed by the processing device, perform operations comprising: a) generating a two-dimensional image from imaging information obtained from the interface, thereby estimating ballistic component of the imaging information; b) generating a three-dimensional image by remapping the two-dimensional image; c) identifying a candidate object in the three-dimensional image; d) obtaining an estimated spatial forward model of the candidate object by mapping the three-dimensional image of the candidate object with a point-spread-function associated with the imaging apparatus; e) obtaining background-corrected data by using the estimated spatial forward model of the candidate object and estimated temporal components; and f) iteratively updating the estimated spatial forward model and estimated temporal components until convergence is reached for the candidate object, thereby extracting the signal information.

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Greenwich, CT, United States of America

Alipasha Vaziri