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24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020

作者： Lomeli, Gabriela Bosse, Marc Bendall, Sean C. Angelo, Michael Herr, Amy E. UC Berkeley UCSF Joint Graduate Program in Bioengineering CA United States Department of Bioengineering University of California Berkeley United States Department of Pathology Stanford University StanfordCA United States

ISBN: (纸本)9781733419017

Single-cell electrophoretic assays offer proteoform detection specificity, but target multiplexing can be further enhanced by transitioning from fluorescence to mass spectrometry imaging for readout. We report for the first time multiplexed ion beam imaging (MIBI) of isoelectrically separated proteoforms from single cells (scIEF). MIBI of scIEF enables the detection of proteoforms differing by a single charge unit. Additionally, we demonstrate that MIBI's ability to do multiple depth image acquisition-comparable to z-stack confocal imaging-enables us to disregard surface artefacts that would normally confound quantitation. © 2020 CBMS-0001

关键词： Depth profiling

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Miniscope3D:optimized single-shot miniature 3D fluorescence microscopy

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Light(Science & Applications) 2020年第1期9卷 367-379页

作者： Kyrollos Yanny Nick Antipa William Liberti Sam Dehaeck Kristina Monakhova Fanglin Linda Liu Konlin Shen Ren Ng Laura Waller UCB/UCSF Joint Graduate Program in Bioengineering University of CaliforniaBerkeleyCA 94720USA Department of Electrical Engineering&Computer Sciences University of CaliforniaBerkeleyCA 94720USA TIPs Department Universite libre de Bruxelles(ULB)1050 BrusselsBelgium

Miniature fluorescence microscopes are a standard tool in systems ***,widefield miniature microscopes capture only 2D information,and modifications that enable 3D capabilities increase the size and weight and have poor resolution outside a narrow depth ***,we achieve the 3D capability by replacing the tube lens of a conventional 2D Miniscope with an optimized multifocal phase mask at the objective’s aperture *** the phase mask at the aperture stop significantly reduces the size of the device,and varying the focal lengths enables a uniform resolution across a wide depth *** phase mask encodes the 3D fluorescence intensity into a single 2D measurement,and the 3D volume is recovered by solving a sparsity-constrained inverse *** provide methods for designing and fabricating the phase mask and an efficient forward model that accounts for the fieldvarying aberrations in miniature *** demonstrate a prototype that is 17mm tall and weighs 2.5 grams,achieving 2.76μm lateral,and 15μm axial resolution across most of the 900×700×390μm^(3) volume at 40 volumes per *** performance is validated experimentally on resolution targets,dynamic biological samples,and mouse brain *** with existing miniature single-shot volume-capture implementations,our system is smaller and lighter and achieves a more than 2×better lateral and axial resolution throughout a 10×larger usable depth *** microscope design provides single-shot 3D imaging for applications where a compact platform matters,such as volumetric neural imaging in freely moving animals and 3D motion studies of dynamic samples in incubators and lab-on-a-chip devices.

关键词： enable resolution narrow

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Investigation of frontopolar cortex under noxious pain stimuli using functional near infrared spectroscopy

Investigation of frontopolar cortex under noxious pain stimu...

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Biomedical Optics, BIOMED 2012

作者： Amarnath, Yennu Khadka, Sabin Gautam, Pritam Tebebi, Pamela A. Tian, Fenghua Liu, Hanli Department of Bioengineering Joint Graduate Program b/w Univ. of Texas Southwestern Medical Ctr University of Texas TX 76019 United States

We report fNIRS signals from the human frontopolar cortex to investigate the hemodynamic responses under noxious pain stimuli. This study shows the potential role of frontopolar cortex in cognitive evaluation of pain ... 详细信息

ISBN: (纸本)9781557529428

关键词： Infrared devices

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Enhancing cell infiltration of electrospun fibrous scaffolds in tissue regeneration

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Bioactive Materials 2016年第1期1卷 56-64页

作者： Jinglei Wu Yi Hong Department of Bioengineering University of Texas at ArlingtonArlingtonTX 76019USA Joint Graduate Program in Biomedical Engineering University of Texas Southwestern Medical CenterDallasTX 75390USA

Electrospinning is one of the most effective approaches to fabricate tissue-engineered scaffolds composed of nano-to sub-microscale fibers that simulate a native extracellular ***,one major concern about electrospun scaffolds for tissue repair and regeneration is that their small pores defined by densely compacted fibers markedly hinder cell infiltration and tissue *** address this problem,researchers have developed and investigated various methods of manipulating scaffold structures to increase pore size or loosen the *** methods involve the use of physical treatments,such as salt leaching,gas foaming and custom-made collectors,and combined techniques to obtain electrospun scaffolds with loose fibrous structures and large *** article provides a summary of these motivating electrospinning techniques to enhance cell infiltration of electrospun scaffolds,which may inspire new electrospinning techniques and their new biomedical applications.

关键词： Electrospinning Scaffolds Porosity control Cell infiltration Tissue regeneration

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Galvanotactic control of collective cell migration in epithelial monolayers (vol 13, pg 409, 2014)

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NATURE MATERIALS 2014年第5期13卷 530-530页

作者： Cohen, Daniel J. Nelson, W. James Maharbiz, Michel M. Joint Graduate Program in Bioengineering University of California at Berkeley Berkeley California 94720 USA Department of Biology Molelcular Cellular Physiology Stanford University Stanford California 94305 USA Department of Electrical Engineering Computer Science University of California at Berkeley Berkeley California 94720 USA

Many normal and pathological biological processes involve the migration of epithelial cell sheets. This arises from complex emergent behaviour resulting from the interplay between cellular signalling networks and the forces that physically couple the cells. Here, we demonstrate that collective migration of an epithelium can be interactively guided by applying electric fields that bias the underlying signalling networks. We show that complex, spatiotemporal cues are locally interpreted by the epithelium, resulting in rapid, coordinated responses such as a collective U-turn, divergent migration, and unchecked migration against an obstacle. We observed that the degree of external control depends on the size and shape of the cell population, and on the existence of physical coupling between cells. Together, our results offer design and engineering principles for the rational manipulation of the collective behaviour and material properties of a tissue.

关键词： CELL migration EPITHELIUM EPITHELIAL cells CELL populations SPATIOTEMPORAL processes

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A confocal optical system for detecting high-speed oscillation of a single ultrasound microbubble

A confocal optical system for detecting high-speed oscillati...

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Bio-Optics: Design and Application, BODA 2013

作者： Yuan, Baohon Liu, Yuan Department of Bioengineering The University of Texas Arlington TX 76019 United States Joint Biomedical Engineering Program The University of Texas Arlington TX 75390 United States Joint Biomedical Engineering Program The University of Texas Southwestern Medical Center Dallas TX 75390 United States

ISBN: (纸本)9781557529664

Microbubbles play significant roles in ultrasound imaging. Direct observation and investigation of microbubble oscillations are expensive. We developed a confocal optical system for detecting microbubble oscillations. This system is cost efficient and provides acceptable results. Optics in the Life Sciences Congress Technical Digest © 2013 The Optical Society (OSA).

关键词： Ultrasonic imaging

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Spectral DefocusCam: hyperspectral imaging using defocus and a spectral filter array

Spectral DefocusCam: hyperspectral imaging using defocus and...

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Computational Optical Sensing and Imaging, COSI 2022

作者： Foley, Christian Monakhova, Kristina Yanny, Kyrollos Waller, Laura Department of Electrical Engineering and Computer Sciences University of California Berkeley United States UCB/UCSF Joint Graduate Program in Bioengineering University of California Berkeley United States

We propose a compact hyperspectral camera based on a focus-tunable lens and spectral filter array. The camera captures then fuses multiple defocused measurements to obtain a high-resolution hyperspectral volume. ©... 详细信息

ISBN: (纸本)9781557528209

关键词： Hyperspectral imaging

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Information-Theoretic Design for High-Dimensional Computational Imaging

Information-Theoretic Design for High-Dimensional Computatio...

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Computational Optical Sensing and Imaging, COSI 2024 - Part of Optica Imaging Congress

作者： Markley, Eric Kabuli, Leyla Chien, Tiffany Pinkard, Henry Waller, Laura UCB/UCSF Joint Graduate Program in Bioengineering University of California Berkeley United States Department of Electrical Engineering and Computer Sciences University of California Berkeley United States

We present a technique for information-theoretic optimization of computational imaging systems demonstrated in snapshot 3D microscopy. By directly evaluating measurement quality and decoupling optimization from downst... 详细信息

关键词： Decoding

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Snapshot hyperspectral imaging using a random phase mask and spectral filter array

Snapshot hyperspectral imaging using a random phase mask and...

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Computational Optical Sensing and Imaging, COSI 2020 - Part of Imaging and Applied Optics Congress 2020

作者： Monakhova, Kristina Yanny, Kyrollos Waller, Laura Department of Electrical Engineering and Computer Sciences University of California Berkeley United States UCB/UCSF Joint Graduate Program in Bioengineering University of California Berkeley United States

We introduce a snapshot hyperspectral imager that uses a random phase mask, repeated spectral filter array, and compressive recovery to achieve high spatial and spectral resolution in a small form factor. © 2020 ... 详细信息

ISBN: (纸本)9781557528209

关键词： Hyperspectral imaging

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MultiWienerNet: Deep learning for fast shift-varying deconvolution

MultiWienerNet: Deep learning for fast shift-varying deconvo...

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Computational Optical Sensing and Imaging, COSI 2021 - Part of OSA Imaging and Applied Optics Congress 2021

作者： Shuai, Richard W. Yanny, Kyrollos Monakhova, Kristina Waller, Laura Department of Electrical Engineering and Computer Sciences University of California Berkeley United States UCB/UCSF Joint Graduate Program in Bioengineering University of California Berkeley United States

We present a deep-learning method based on Wiener filters and U-Nets that performs image reconstruction in systems with spatially-varying aberrations. We train on simulated microscopy measurements and test on experime... 详细信息

ISBN: (纸本)9781557528209

关键词： Image reconstruction

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