1
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Zhang Y, Benirschke D, Abdalsalam O, Howard SS. Generalized stepwise optical saturation enables super-resolution fluorescence lifetime imaging microscopy. Biomed Opt Express 2018; 9:4077-4093. [PMID: 30615706 PMCID: PMC6157771 DOI: 10.1364/boe.9.004077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/25/2018] [Accepted: 07/28/2018] [Indexed: 05/29/2023]
Abstract
We present a novel super-resolution fluorescence lifetime microscopy technique called generalized stepwise optical saturation (GSOS) that generalizes and extends the concept of the recently demonstrated stepwise optical saturation (SOS) super-resolution microscopy [Biomed. Opt. Express9, 1613 (2018)]. The theoretical basis of GSOS is developed based on exploring the dynamics of a two-level fluorophore model and using perturbation theory. We show that although both SOS and GSOS utilize the linear combination of M raw images to increase the imaging resolution by a factor of M , SOS is a special and the simplest case of GSOS. The super-resolution capability is demonstrated with theoretical analysis and numerical simulations for GSOS with sinusoidal and pulse-train modulations. Using GSOS with pulse-train modulation, super-resolution and fluorescence lifetime imaging microscopy (FLIM) images can be obtained simultaneously. The super-resolution FLIM capability is experimentally demonstrated with a cell sample on a custom-built two-photon frequency-domain (FD) FLIM system based on radio frequency analog signal processing. To our knowledge, this is the first implementation of super-resolution imaging in FD-FLIM.
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Affiliation(s)
- Yide Zhang
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - David Benirschke
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Ola Abdalsalam
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Scott S. Howard
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
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2
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Papageorgiou EP, Zhang H, Giverts S, Park C, Boser BE, Anwar M. Real-time cancer detection with an integrated lensless fluorescence contact imager. Biomed Opt Express 2018; 9:3607-3623. [PMID: 30338143 PMCID: PMC6191610 DOI: 10.1364/boe.9.003607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/14/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
Microscopic tumor cell foci left in a patient after surgery significantly increase the chance of cancer recurrence. However, fluorescence microscopes used for intraoperative navigation lack the necessary sensitivity for imaging microscopic disease and are too bulky to maneuver within the resection cavity. We have developed a scalable chip-scale fluorescence contact imager for detecting microscopic cancer in vivo and in real-time. The imager has been characterized under simulated in vivo conditions using ex vivo samples, providing strong evidence that our device can be used in vivo. Angle-selective gratings enhance the resolution of the imager without impacting its physical size. We demonstrate detection of cancer cell clusters containing as few as 25 HCC1569 breast cancer cells and 400 LNCaP prostate cancer cells with integration times of only 50 ms and 70 ms, respectively. A cell cluster recognition algorithm is used to achieve both a sensitivity and specificity of 92 % for HCC1569 cell samples, indicating the reliability of the imager. The signal-to-noise ratio (SNR) degradation with increased separation is only 1.5 dB at 250 μm. Blood scattering and absorption reduce the SNR by less than 2 dB for typical concentrations. Moreover, HER2+ breast cancer tissue taken from a patient is distinguished from normal breast tissue with an integration time of only 75 ms.
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Affiliation(s)
- Efthymios P. Papageorgiou
- Electrical Engineering and Computer Sciences Department, University of California, Berkeley, California 94720,
USA
| | - Hui Zhang
- Department of Radiation Oncology, University of California, San Francisco, California 94158,
USA
| | - Simeon Giverts
- Electrical Engineering and Computer Sciences Department, University of California, Berkeley, California 94720,
USA
| | - Catherine Park
- Department of Radiation Oncology, University of California, San Francisco, California 94158,
USA
| | - Bernhard E. Boser
- Electrical Engineering and Computer Sciences Department, University of California, Berkeley, California 94720,
USA
| | - Mekhail Anwar
- Department of Radiation Oncology, University of California, San Francisco, California 94158,
USA
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3
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Pak RW, Kang J, Valentine H, Loew LM, Thorek DLJ, Boctor EM, Wong DF, Kang JU. Voltage-sensitive dye delivery through the blood brain barrier using adenosine receptor agonist regadenoson. Biomed Opt Express 2018; 9:3915-3922. [PMID: 30338164 PMCID: PMC6191611 DOI: 10.1364/boe.9.003915] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/14/2018] [Accepted: 07/23/2018] [Indexed: 05/27/2023]
Abstract
Optical imaging of brain activity has mostly employed genetically manipulated mice, which cannot be translated to clinical human usage. Observation of brain activity directly is challenging due to the difficulty in delivering dyes and other agents through the blood brain barrier (BBB). Using fluorescence imaging, we have demonstrated the feasibility of delivering the near-infrared voltage-sensitive dye (VSD) IR-780 perchlorate to the brain tissue through pharmacological techniques, via an adenosine agonist (regadenoson). Comparison of VSD fluorescence of mouse brains without and with regadenoson showed significantly increased residence time of the fluorescence signal in the latter case, indicative of VSD diffusion into the brain tissue. Dose and timing of regadenoson were varied to optimize BBB permeability for VSD delivery.
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Affiliation(s)
- Rebecca W. Pak
- Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jeeun Kang
- Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Heather Valentine
- Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Leslie M. Loew
- R.D. Berlin Center for Cell Analysis and Modeling, University of Connecticut School of Medicine, Farmington, CT, USA
| | - Daniel L. J. Thorek
- Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Emad M. Boctor
- Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dean F. Wong
- Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jin U. Kang
- Electrical and Computer Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, USA
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4
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Ahn J, Kim KH, Choe K, Lim JH, Lee SK, Kim YS, Kim P. Quantitative two-photon microscopy imaging analysis of human skin to evaluate enhanced transdermal delivery by hybrid-type multi-lamellar nanostructure. Biomed Opt Express 2018; 9:3974-3982. [PMID: 30338168 PMCID: PMC6191627 DOI: 10.1364/boe.9.003974] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/15/2018] [Accepted: 07/23/2018] [Indexed: 06/08/2023]
Abstract
Transdermal skin delivery is a method to transport various topical formulations to a deeper skin layer non-invasively. Permeability analysis of many delivering agents has been mostly conducted by a simple tape stripping method. However, it cannot reveal a detailed depth-dependent distribution profile of transdermally delivered agents in the skin. In this work, we achieved a cellular-level depth-defined visualization of fluorophore-labelled human epidermal growth factor (EGF) transdermally delivered to human skin by using encapsulation with common liposomes and newly fabricated multi-lamellar nanostructures using a custom-design two-photon microscopy system. It was able to generate 3D reconstructed images displaying the distribution of human EGF inside the human skin sample with high-resolution. Based on a depthwise fluorescence intensity profile showing the permeation of human EGF, a quantitative analysis was performed to assess the transdermal delivery efficacy achieved by each formulation, showing a significant improvement of the efficacy with the utilization of multi-lamellar nanostructure.
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Affiliation(s)
- Jinhyo Ahn
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
| | - Kyeong Hu Kim
- Biotechnology Research Institute, CELLTRION, 23 Academy-ro, Yeonsu-gu, Incheon 22014, South Korea
| | - Kibaek Choe
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
| | - Joo Hyuck Lim
- Biotechnology Research Institute, CELLTRION, 23 Academy-ro, Yeonsu-gu, Incheon 22014, South Korea
| | - Seung Ki Lee
- Biotechnology Research Institute, CELLTRION, 23 Academy-ro, Yeonsu-gu, Incheon 22014, South Korea
| | - Yeon Sook Kim
- Biotechnology Research Institute, CELLTRION, 23 Academy-ro, Yeonsu-gu, Incheon 22014, South Korea
| | - Pilhan Kim
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, South Korea
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5
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Orth A, Ghosh RN, Wilson ER, Doughney T, Brown H, Reineck P, Thompson JG, Gibson BC. Super-multiplexed fluorescence microscopy via photostability contrast. Biomed Opt Express 2018; 9:2943-2954. [PMID: 29984077 PMCID: PMC6033574 DOI: 10.1364/boe.9.002943] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 05/24/2018] [Accepted: 05/26/2018] [Indexed: 05/21/2023]
Abstract
Fluorescence microscopy is widely used to observe and quantify the inner workings of the cell. Traditionally, multiple types of cellular structures or biomolecules are visualized simultaneously in a sample by using spectrally distinct fluorescent labels. The wide emission spectra of most fluorophores limits spectral multiplexing to four or five labels in a standard fluorescence microscope. Further multiplexing requires another dimension of contrast. Here, we show that photostability differences can be used to distinguish between fluorescent labels. By combining photobleaching characteristics with a novel unmixing algorithm, we resolve up to three fluorescent labels in a single spectral channel and unmix fluorescent labels with nearly identical emission spectra. We apply our technique to organic dyes, autofluorescent biomolecules and fluorescent proteins. Our approach has the potential to triple the multiplexing capabilities of any digital widefield or confocal fluorescence microscope with no additional hardware, making it readily accessible to a wide range of researchers.
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Affiliation(s)
- Antony Orth
- ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
| | - Richik N. Ghosh
- Thermo Fisher Scientific, 100 Technology Drive, Pittsburgh, PA 15219, USA
| | - Emma R. Wilson
- ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
| | - Timothy Doughney
- ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
- Defence Science and Technology Group, Cyber and Electronic Warfare Division, Edinburgh, SA 5111, Australia
| | - Hannah Brown
- ARC Centre of Excellence for Nanoscale BioPhotonics, Robinson Research Institute, Institute for Photonics and Sensing, Adelaide Medical School, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Philipp Reineck
- ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
| | - Jeremy G. Thompson
- ARC Centre of Excellence for Nanoscale BioPhotonics, Robinson Research Institute, Institute for Photonics and Sensing, Adelaide Medical School, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Brant C. Gibson
- ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, Melbourne, VIC 3001, Australia
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6
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Kwok SJJ, Jo Y, Lin HH, Choi M, Yun SH. Millisecond cellular labelling in situ with two-photon photoconversion. Biomed Opt Express 2018; 9:3067-3077. [PMID: 29984083 PMCID: PMC6033565 DOI: 10.1364/boe.9.003067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/23/2018] [Accepted: 06/06/2018] [Indexed: 06/08/2023]
Abstract
In situ labeling of cells within living biological tissues using photoconversion has provided valuable information on cellular physiology in their natural environments. However, current photoconvertible probes typically require seconds to minutes of light exposure, limiting their uses in rapid biological processes such as intracellular diffusion and circulating cells. Here, we report that two-photon photoconversion of cyanine-based dyes offers unprecedentedly rapid photoconversion down to millisecond timescales per cell. We demonstrate potential biological applications including measuring intracellular diffusion kinetics in a spinal nerve, labeling of rapidly flowing cells in a microfluidic channel, and photoconversion of a circulating cell in vivo.
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Affiliation(s)
- Sheldon J J Kwok
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 50 Blossom Street, Boston, MA 02114, USA
- Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Yongjae Jo
- Department of Biomedical Engineering, Sungkyunkwan University, Suwon 16419, South Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon 16419, South Korea
| | - Harvey H Lin
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 50 Blossom Street, Boston, MA 02114, USA
| | - Myunghwan Choi
- Department of Biomedical Engineering, Sungkyunkwan University, Suwon 16419, South Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon 16419, South Korea
| | - Seok-Hyun Yun
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 50 Blossom Street, Boston, MA 02114, USA
- Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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7
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Yang F, Yao R, Ozturk M, Faulkner D, Qu Q, Intes X. Improving mesoscopic fluorescence molecular tomography via preconditioning and regularization. Biomed Opt Express 2018; 9:2765-2778. [PMID: 30258689 PMCID: PMC6154183 DOI: 10.1364/boe.9.002765] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/11/2018] [Accepted: 05/15/2018] [Indexed: 05/21/2023]
Abstract
Mesoscopic fluorescence molecular tomography (MFMT) is a novel imaging technique capable of obtaining 3-D distribution of molecular probes inside biological tissues at depths of a few millimeters with a resolution up to ~100 μm. However, the ill-conditioned nature of the MFMT inverse problem severely deteriorates its reconstruction performances. Furthermore, dense spatial sampling and fine discretization of the imaging volume required for high resolution reconstructions make the sensitivity matrix (Jacobian) highly correlated, which prevents even advanced algorithms from achieving optimal solutions. In this work, we propose two computational methods to respectively increase the incoherence of the sensitivity matrix and improve the convergence rate of the inverse solver. We first apply a compressed sensing (CS) based preconditioner on either the whole sensitivity matrix or sub sensitivity matrices to reduce the coherence between columns of the sensitivity matrix. Then we employed a regularization method based on the weight iterative improvement method (WIIM) to mitigate the ill-condition of the sensitivity matrix and to drive the iterative optimization process towards convergence at a faster rate. We performed numerical simulations and phantom experiments to validate the effectiveness of the proposed strategies. In both in silico and in vitro cases, we were able to improve the quality of MFMT reconstructions significantly.
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Affiliation(s)
- Fugang Yang
- School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China
| | - Ruoyang Yao
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Mehmet Ozturk
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Denzel Faulkner
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Qinglan Qu
- Department of Reproductive Medicine, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai 264000, China
| | - Xavier Intes
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
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8
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Lee K, Shirshin E, Rovnyagina N, Yaya F, Boujja Z, Priezzhev A, Wagner C. Dextran adsorption onto red blood cells revisited: single cell quantification by laser tweezers combined with microfluidics. Biomed Opt Express 2018; 9:2755-2764. [PMID: 30258688 PMCID: PMC6154185 DOI: 10.1364/boe.9.002755] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/28/2018] [Accepted: 05/06/2018] [Indexed: 05/31/2023]
Abstract
The aggregation of red blood cells (RBC) is of importance for hemorheology, while its mechanism remains debatable. The key question is the role of the adsorption of macromolecules on RBC membranes, which may act as "bridges" between cells. It is especially important that dextran is considered to induce "bridge"-less aggregation due to the depletion forces. We revisit the dextran-RBC interaction on the single cell level using the laser tweezers combined with microfluidic technology and fluorescence microscopy. An immediate sorption of ~104 molecules of 70 kDa dextran per cell was observed. During the incubation of RBC with dextran, a gradual tenfold increase of adsorption was found, accompanied by a moderate change in the RBC deformability. The obtained data demonstrate that dextran sorption and incubation-induced changes of the membrane properties must be considered when studying RBC aggregation in vitro.
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Affiliation(s)
- Kisung Lee
- Experimental Physics, Saarland University, Saarbrücken, D-66041, Germany
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
- Curremtly with Ulsan National Institute of Science and Technology, Institute for Basic Science, Center for Soft and Living Matter, Ulsan, 44919, South Korea
- Co-first authors with equal contribution
| | - Evgeny Shirshin
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
- Co-first authors with equal contribution
| | - Nataliya Rovnyagina
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Francois Yaya
- Experimental Physics, Saarland University, Saarbrücken, D-66041, Germany
- Laboratoire Interdisciplinaire de Physique, UMR 5588 CNRS and University Grenoble–Alpes, Saint Martin d’Hères Cedex, B.P. 87, 38402, France
| | - Zakaria Boujja
- Experimental Physics, Saarland University, Saarbrücken, D-66041, Germany
- LaMCScI, University Mohamed V, Faculty of Sciences, Rabat, Morocco
| | - Alexander Priezzhev
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
- International Laser Center, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Christian Wagner
- Experimental Physics, Saarland University, Saarbrücken, D-66041, Germany
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511, Luxembourg
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9
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Kim M, Hong J, Shin HJ. Double-pulse laser illumination method for measuring fast cerebral blood flow velocities in the deep brain using a fiber-bundle-based endomicroscopy system. Biomed Opt Express 2018; 9:2699-2715. [PMID: 30258684 PMCID: PMC6154180 DOI: 10.1364/boe.9.002699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/14/2018] [Accepted: 05/14/2018] [Indexed: 06/08/2023]
Abstract
We present a new fiber-bundle-based endomicroscopy system to measure the fast cerebral blood flow (CBF) velocity in blood vessels located between the surface and the deep brain of living animals. The CBF velocity is obtained by measuring the displacement of the partially overlapped red blood cell images directly, using double-pulse 532-nm laser illumination. The proposed method could measure CBF in blood vessels with diameters ranging from 4 μm to 42 μm and could measure CBF velocities up to 3.2 μm/ms for different vessel diameters at a depth of 2.1 mm from the brain surface in a living mouse.
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Affiliation(s)
- Minkyung Kim
- Center for Bionics, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Biomedical Engineering, KIST School, UST, Korea University of Science and Technology, Seoul 02792, South Korea
| | - Jinki Hong
- Center for Bionics, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Biomedical Engineering, KIST School, UST, Korea University of Science and Technology, Seoul 02792, South Korea
| | - Hyun-joon Shin
- Center for Bionics, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Biomedical Engineering, KIST School, UST, Korea University of Science and Technology, Seoul 02792, South Korea
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10
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Giacomelli MG, Yoshitake T, Cahill LC, Vardeh H, Quintana LM, Faulkner-Jones BE, Brooker J, Connolly JL, Fujimoto JG. Multiscale nonlinear microscopy and widefield white light imaging enables rapid histological imaging of surgical specimen margins. Biomed Opt Express 2018; 9:2457-2475. [PMID: 29761001 PMCID: PMC5946802 DOI: 10.1364/boe.9.002457] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/10/2018] [Accepted: 04/18/2018] [Indexed: 05/07/2023]
Abstract
The ability to histologically assess surgical specimens in real-time is a long-standing challenge in cancer surgery, including applications such as breast conserving therapy (BCT). Up to 40% of women treated with BCT for breast cancer require a repeat surgery due to postoperative histological findings of close or positive surgical margins using conventional formalin fixed paraffin embedded histology. Imaging technologies such as nonlinear microscopy (NLM), combined with exogenous fluorophores can rapidly provide virtual H&E imaging of surgical specimens without requiring microtome sectioning, facilitating intraoperative assessment of margin status. However, the large volume of typical surgical excisions combined with the need for rapid assessment, make comprehensive cellular resolution margin assessment during surgery challenging. To address this limitation, we developed a multiscale, real-time microscope with variable magnification NLM and real-time, co-registered position display using a widefield white light imaging system. Margin assessment can be performed rapidly under operator guidance to image specific regions of interest located using widefield imaging. Using simulated surgical margins dissected from human breast excisions, we demonstrate that multi-centimeter margins can be comprehensively imaged at cellular resolution, enabling intraoperative margin assessment. These methods are consistent with pathology assessment performed using frozen section analysis (FSA), however NLM enables faster and more comprehensive assessment of surgical specimens because imaging can be performed without freezing and cryo-sectioning. Therefore, NLM methods have the potential to be applied to a wide range of intra-operative applications.
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Affiliation(s)
- Michael G Giacomelli
- Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, 32 Vassar Street, Cambridge, MA 02139,USA
| | - Tadayuki Yoshitake
- Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, 32 Vassar Street, Cambridge, MA 02139,USA
| | - Lucas C Cahill
- Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, 32 Vassar Street, Cambridge, MA 02139,USA
| | - Hilde Vardeh
- Harvard Medical School, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Liza M Quintana
- Harvard Medical School, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Beverly E Faulkner-Jones
- Harvard Medical School, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Jeff Brooker
- Thorlabs Advanced Imaging Group, 108 Powers Court, Sterling, VA 20166, USA
| | - James L Connolly
- Harvard Medical School, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA
| | - James G Fujimoto
- Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, 32 Vassar Street, Cambridge, MA 02139,USA
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11
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Chen Z, Deán-Ben XL, Gottschalk S, Razansky D. Performance of optoacoustic and fluorescence imaging in detecting deep-seated fluorescent agents. Biomed Opt Express 2018; 9:2229-2239. [PMID: 29760983 PMCID: PMC5946784 DOI: 10.1364/boe.9.002229] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/08/2018] [Accepted: 03/09/2018] [Indexed: 05/03/2023]
Abstract
Fluorescent contrast agents are widely employed in biomedical research. While many studies have reported deep tissue imaging of fluorescent moieties using either fluorescence-based or absorption-based (optoacoustic) imaging systems, no systematic comparison has been performed regarding the actual performance of these imaging modalities in detecting deep-seated fluorescent agents. Herein, an integrated imager combining epi-fluorescence and volumetric optoacoustic imaging capabilities has been employed in order to evaluate image degradation with depth for several commonly-used near-infrared dyes in both modes. We performed controlled experiments in tissue-mimicking phantoms containing deeply embedded targets filled with different concentrations of Alexa Fluor 700, Alexa Fluor 750, indocyanine green (ICG) and IRDye 800CW. The results are further corroborated by multi-modal imaging of ICG through mouse tissues in vivo. It is shown that optoacoustics consistently provides better sensitivity in differentiating fluorescent targets located at depths beyond 2 mm in turbid tissues, as quantified by evaluating image contrast, signal to noise ratio and spatial resolution performance.
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Affiliation(s)
- Zhenyue Chen
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Xosé Luís Deán-Ben
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Sven Gottschalk
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Daniel Razansky
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
- Faculty of Medicine, Technical University of Munich, Ismaninger Str. 22, 81675 Munich, Germany
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12
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Zickus V, Taylor JM. 3D + time blood flow mapping using SPIM-microPIV in the developing zebrafish heart. Biomed Opt Express 2018; 9:2418-2435. [PMID: 29760998 PMCID: PMC5946799 DOI: 10.1364/boe.9.002418] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 04/17/2018] [Indexed: 05/08/2023]
Abstract
We present SPIM-μPIV as a flow imaging system, capable of measuring in vivo flow information with 3D micron-scale resolution. Our system was validated using a phantom experiment consisting of a flow of beads in a 50 μm diameter FEP tube. Then, with the help of optical gating techniques, we obtained 3D + time flow fields throughout the full heartbeat in a ∼3 day old zebrafish larva using fluorescent red blood cells as tracer particles. From this we were able to recover 3D flow fields at 31 separate phases in the heartbeat. From our measurements of this specimen, we found the net pumped blood volume through the atrium to be 0.239 nL per beat. SPIM-μPIV enables high quality in vivo measurements of flow fields that will be valuable for studies of heart function and fluid-structure interaction in a range of small-animal models.
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13
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Park I, Choe K, Seo H, Hwang Y, Song E, Ahn J, Hwan Jo Y, Kim P. Intravital imaging of a pulmonary endothelial surface layer in a murine sepsis model. Biomed Opt Express 2018; 9:2383-2393. [PMID: 29760995 PMCID: PMC5946796 DOI: 10.1364/boe.9.002383] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/16/2018] [Accepted: 04/20/2018] [Indexed: 05/18/2023]
Abstract
Direct intravital imaging of an endothelial surface layer (ESL) in pulmonary microcirculation could be a valuable approach to investigate the role of a vascular endothelial barrier in various pathological conditions. Despite its importance as a marker of endothelial cell damage and impairment of the vascular system, in vivo visualization of ESL has remained a challenging technical issue. In this work, we implemented a pulmonary microcirculation imaging system integrated to a custom-design video-rate laser scanning confocal microscopy platform. Using the system, a real-time cellular-level microscopic imaging of the lung was successfully performed, which facilitated a clear identification of individual flowing erythrocytes in pulmonary capillaries. Subcellular level pulmonary ESL was identified in vivo by fluorescence angiography using a dextran conjugated fluorophore to label blood plasma and the red blood cell (RBC) exclusion imaging analysis. Degradation of ESL width was directly evaluated in a murine sepsis model in vivo, suggesting an impairment of pulmonary vascular endothelium and endothelial barrier dysfunction.
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Affiliation(s)
- Inwon Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Kibaek Choe
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Howon Seo
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Yoonha Hwang
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Eunjoo Song
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Jinhyo Ahn
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - You Hwan Jo
- Department of Emergency Medicine, Seoul National University Bundang Hospital (SNUBH), 82 Gumi-ro, 173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620
- Department of Emergency Medicine, Seoul National University College of Medicine (SNUCM), 103 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea
| | - Pilhan Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
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14
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Young LK, Jarrin M, Saunter CD, Quinlan RA, Girkin JM. Non-invasive in vivo quantification of the developing optical properties and graded index of the embryonic eye lens using SPIM. Biomed Opt Express 2018; 9:2176-2188. [PMID: 29760979 PMCID: PMC5946780 DOI: 10.1364/boe.9.002176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
Graded refractive index lenses are inherent to advanced visual systems in animals. By understanding their formation and local optical properties, significant potential for improved ocular healthcare may be realized. We report a novel technique measuring the developing optical power of the eye lens, in a living animal, by exploiting the orthogonal imaging modality of a selective plane illumination microscope (SPIM). We have quantified the maturation of the lenticular refractive index at three different visible wavelengths using a combined imaging and ray tracing approach. We demonstrate that the method can be used with transgenic and vital dye labeling as well as with both fixed and living animals. Using a key eye lens morphogen and its inhibitor, we have measured their effects both on lens size and on refractive index. Our technique provides insights into the mechanisms involved in the development of this natural graded index micro-lens and its associated optical properties.
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Affiliation(s)
- Laura K Young
- Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK
- Biophysical Sciences Institute, Durham University, South Road, Durham, DH1 3LE, UK
- Joint first authors
| | - Miguel Jarrin
- Biophysical Sciences Institute, Durham University, South Road, Durham, DH1 3LE, UK
- Department of Biosciences, Durham University, Upper Mountjoy, Stockton Road, Durham, DH1 3LE, UK
- Joint first authors
| | - Christopher D Saunter
- Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK
- Biophysical Sciences Institute, Durham University, South Road, Durham, DH1 3LE, UK
| | - Roy A Quinlan
- Biophysical Sciences Institute, Durham University, South Road, Durham, DH1 3LE, UK
- Department of Biosciences, Durham University, Upper Mountjoy, Stockton Road, Durham, DH1 3LE, UK
| | - John M Girkin
- Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK
- Biophysical Sciences Institute, Durham University, South Road, Durham, DH1 3LE, UK
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15
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Ohayon S, Caravaca-Aguirre A, Piestun R, DiCarlo JJ. Minimally invasive multimode optical fiber microendoscope for deep brain fluorescence imaging. Biomed Opt Express 2018; 9:1492-1509. [PMID: 29675297 PMCID: PMC5905901 DOI: 10.1364/boe.9.001492] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/22/2018] [Accepted: 02/23/2018] [Indexed: 05/20/2023]
Abstract
A major open challenge in neuroscience is the ability to measure and perturb neural activity in vivo from well defined neural sub-populations at cellular resolution anywhere in the brain. However, limitations posed by scattering and absorption prohibit non-invasive multi-photon approaches for deep (>2mm) structures, while gradient refractive index (GRIN) endoscopes are relatively thick and can cause significant damage upon insertion. Here, we present a novel micro-endoscope design to image neural activity at arbitrary depths via an ultra-thin multi-mode optical fiber (MMF) probe that has 5-10X thinner diameter than commercially available micro-endoscopes. We demonstrate micron-scale resolution, multi-spectral and volumetric imaging. In contrast to previous approaches, we show that this method has an improved acquisition speed that is sufficient to capture rapid neuronal dynamics in-vivo in rodents expressing a genetically encoded calcium indicator (GCaMP). Our results emphasize the potential of this technology in neuroscience applications and open up possibilities for cellular resolution imaging in previously unreachable brain regions.
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Affiliation(s)
- Shay Ohayon
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139,
USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139,
USA
| | - Antonio Caravaca-Aguirre
- Department of Electrical, Computer and Energy Engineering, University of Colorado, Boulder, CO 80309,
USA
| | - Rafael Piestun
- Department of Electrical, Computer and Energy Engineering, University of Colorado, Boulder, CO 80309,
USA
| | - James J. DiCarlo
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139,
USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139,
USA
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16
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Nam HS, Kang WJ, Lee MW, Song JW, Kim JW, Oh WY, Yoo H. Multispectral analog-mean-delay fluorescence lifetime imaging combined with optical coherence tomography. Biomed Opt Express 2018; 9:1930-1947. [PMID: 29675330 PMCID: PMC5905935 DOI: 10.1364/boe.9.001930] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 03/15/2018] [Accepted: 03/18/2018] [Indexed: 05/19/2023]
Abstract
The pathophysiological progression of chronic diseases, including atherosclerosis and cancer, is closely related to compositional changes in biological tissues containing endogenous fluorophores such as collagen, elastin, and NADH, which exhibit strong autofluorescence under ultraviolet excitation. Fluorescence lifetime imaging (FLIm) provides robust detection of the compositional changes by measuring fluorescence lifetime, which is an inherent property of a fluorophore. In this paper, we present a dual-modality system combining a multispectral analog-mean-delay (AMD) FLIm and a high-speed swept-source optical coherence tomography (OCT) to simultaneously visualize the cross-sectional morphology and biochemical compositional information of a biological tissue. Experiments using standard fluorescent solutions showed that the fluorescence lifetime could be measured with a precision of less than 40 psec using the multispectral AMD-FLIm without averaging. In addition, we performed ex vivo imaging on rabbit iliac normal-looking and atherosclerotic specimens to demonstrate the feasibility of the combined FLIm-OCT system for atherosclerosis imaging. We expect that the combined FLIm-OCT will be a promising next-generation imaging technique for diagnosing atherosclerosis and cancer due to the advantages of the proposed label-free high-precision multispectral lifetime measurement.
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Affiliation(s)
- Hyeong Soo Nam
- Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04673, South Korea
- Equally contributed to this study
| | - Woo Jae Kang
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Gwahang-no, Yuseong-gu, Daejeon 34141, South Korea
- Equally contributed to this study
| | - Min Woo Lee
- Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04673, South Korea
| | - Joon Woo Song
- Cardiovascular Center, Korea University Guro Hospital, 148 Gurodong-ro, Guro-gu, Seoul 08308, South Korea
| | - Jin Won Kim
- Cardiovascular Center, Korea University Guro Hospital, 148 Gurodong-ro, Guro-gu, Seoul 08308, South Korea
| | - Wang-Yuhl Oh
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Gwahang-no, Yuseong-gu, Daejeon 34141, South Korea
| | - Hongki Yoo
- Department of Biomedical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04673, South Korea
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17
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Tinning PW, Scrimgeour R, McConnell G. Widefield standing wave microscopy of red blood cell membrane morphology with high temporal resolution. Biomed Opt Express 2018; 9:1745-1761. [PMID: 29675316 PMCID: PMC5905920 DOI: 10.1364/boe.9.001745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/09/2018] [Accepted: 03/09/2018] [Indexed: 05/10/2023]
Abstract
We report the first demonstration of widefield standing wave (SW) microscopy of fluorescently labelled red blood cells at high speeds that allow for the rapid imaging of membrane deformations. Using existing and custom MATLAB functions, we also present a method to generate 2D and 3D reconstructions of the SW data for improved visualization of the cell. We compare our technique with standard widefield epifluorescence imaging and show that the SW technique not only reveals more topographical information about the specimen but does so without increasing toxicity or the rate of photobleaching and could make this a powerful technique for the diagnosis or study of red blood cell morphology and biomechanical characteristics.
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Affiliation(s)
- Peter W Tinning
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 ONG, UK
| | - Ross Scrimgeour
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 ONG, UK
| | - Gail McConnell
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 ONG, UK
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18
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Lu R, Tanimoto M, Koyama M, Ji N. 50 Hz volumetric functional imaging with continuously adjustable depth of focus. Biomed Opt Express 2018; 9:1964-1976. [PMID: 29675332 PMCID: PMC5905937 DOI: 10.1364/boe.9.001964] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/08/2018] [Accepted: 03/16/2018] [Indexed: 05/22/2023]
Abstract
Understanding how neural circuits control behavior requires monitoring a large population of neurons with high spatial resolution and volume rate. Here we report an axicon-based Bessel beam module with continuously adjustable depth of focus (CADoF), that turns frame rate into volume rate by extending the excitation focus in the axial direction while maintaining high lateral resolutions. Cost-effective and compact, this CADoF Bessel module can be easily integrated into existing two-photon fluorescence microscopes. Simply translating one of the relay lenses along its optical axis enabled continuous adjustment of the axial length of the Bessel focus. We used this module to simultaneously monitor activity of spinal projection neurons extending over 60 µm depth in larval zebrafish at 50 Hz volume rate with adjustable axial extent of the imaged volume.
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Affiliation(s)
- Rongwen Lu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Contributed equally
| | - Masashi Tanimoto
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
- Contributed equally
| | - Minoru Koyama
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Na Ji
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Department of Physics and Department of Molecular & Cellular Biology, University of California, Berkeley, CA, USA
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19
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Zhang Y, Nallathamby PD, Vigil GD, Khan AA, Mason DE, Boerckel JD, Roeder RK, Howard SS. Super-resolution fluorescence microscopy by stepwise optical saturation. Biomed Opt Express 2018; 9:1613-1629. [PMID: 29675306 PMCID: PMC5905910 DOI: 10.1364/boe.9.001613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 05/07/2023]
Abstract
Super-resolution fluorescence microscopy is an important tool in biomedical research for its ability to discern features smaller than the diffraction limit. However, due to its difficult implementation and high cost, the super-resolution microscopy is not feasible in many applications. In this paper, we propose and demonstrate a saturation-based super-resolution fluorescence microscopy technique that can be easily implemented and requires neither additional hardware nor complex post-processing. The method is based on the principle of stepwise optical saturation (SOS), where M steps of raw fluorescence images are linearly combined to generate an image with a [Formula: see text]-fold increase in resolution compared with conventional diffraction-limited images. For example, linearly combining (scaling and subtracting) two images obtained at regular powers extends the resolution by a factor of 1.4 beyond the diffraction limit. The resolution improvement in SOS microscopy is theoretically infinite but practically is limited by the signal-to-noise ratio. We perform simulations and experimentally demonstrate super-resolution microscopy with both one-photon (confocal) and multiphoton excitation fluorescence. We show that with the multiphoton modality, the SOS microscopy can provide super-resolution imaging deep in scattering samples.
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Affiliation(s)
- Yide Zhang
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Prakash D. Nallathamby
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Genevieve D. Vigil
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Aamir A. Khan
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Devon E. Mason
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, PA 19104,
USA
| | - Joel D. Boerckel
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, PA 19104,
USA
| | - Ryan K. Roeder
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Scott S. Howard
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
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20
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Lu R, Tanimoto M, Koyama M, Ji N. 50 Hz volumetric functional imaging with continuously adjustable depth of focus. Biomed Opt Express 2018; 9:1964-1976. [PMID: 29675332 DOI: 10.1101/240069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/08/2018] [Accepted: 03/16/2018] [Indexed: 05/22/2023]
Abstract
Understanding how neural circuits control behavior requires monitoring a large population of neurons with high spatial resolution and volume rate. Here we report an axicon-based Bessel beam module with continuously adjustable depth of focus (CADoF), that turns frame rate into volume rate by extending the excitation focus in the axial direction while maintaining high lateral resolutions. Cost-effective and compact, this CADoF Bessel module can be easily integrated into existing two-photon fluorescence microscopes. Simply translating one of the relay lenses along its optical axis enabled continuous adjustment of the axial length of the Bessel focus. We used this module to simultaneously monitor activity of spinal projection neurons extending over 60 µm depth in larval zebrafish at 50 Hz volume rate with adjustable axial extent of the imaged volume.
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Affiliation(s)
- Rongwen Lu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Contributed equally
| | - Masashi Tanimoto
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
- Contributed equally
| | - Minoru Koyama
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Na Ji
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
- Department of Physics and Department of Molecular & Cellular Biology, University of California, Berkeley, CA, USA
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21
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Wong C, Pawlowski ME, Forcucci A, Majors CE, Richards-Kortum R, Tkaczyk TS. Development of a universal, tunable, miniature fluorescence microscope for use at the point of care. Biomed Opt Express 2018; 9:1041-1056. [PMID: 29541502 PMCID: PMC5846512 DOI: 10.1364/boe.9.001041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/29/2018] [Accepted: 01/29/2018] [Indexed: 05/26/2023]
Abstract
Fluorescence microscopy can be a powerful tool for cell-based diagnostic assays; however, imaging can be time consuming and labor intensive to perform. Tunable systems give the ability to electronically focus at user selected depths inside an object volume and may simplify the opto-mechanical design of the imaging system. We present a prototype of a universal, tunable, miniature fluorescence microscope built from poly(methyl methacrylate) singlets that incorporates miniature, electrowetted lenses for electronic focusing. We demonstrate the ability of this system to perform clinically relevant differential white blood cell counts using single use custom cartridges pre-loaded with the fluorescent dye acridine orange.
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Affiliation(s)
- Cynthia Wong
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
| | - Michal E. Pawlowski
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
| | - Alessandra Forcucci
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
| | - Catherine E. Majors
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
| | - Rebecca Richards-Kortum
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Tomasz S. Tkaczyk
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77005, USA
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA
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22
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Dardikman G, Nygate YN, Barnea I, Turko NA, Singh G, Javidi B, Shaked NT. Integral refractive index imaging of flowing cell nuclei using quantitative phase microscopy combined with fluorescence microscopy. Biomed Opt Express 2018. [PMID: 29541511 PMCID: PMC5846521 DOI: 10.1364/boe.9.001177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We suggest a new multimodal imaging technique for quantitatively measuring the integral (thickness-average) refractive index of the nuclei of live biological cells in suspension. For this aim, we combined quantitative phase microscopy with simultaneous 2-D fluorescence microscopy. We used 2-D fluorescence microscopy to localize the nucleus inside the quantitative phase map of the cell, as well as for measuring the nucleus radii. As verified offline by both 3-D confocal fluorescence microscopy and 2-D fluorescence microscopy while rotating the cells during flow, the nucleus of cells in suspension that are not during division can be assumed to be an ellipsoid. The entire shape of a cell in suspension can be assumed to be a sphere. Then, the cell and nucleus 3-D shapes can be evaluated based on their in-plain radii available from the 2-D phase and fluorescent measurements, respectively. Finally, the nucleus integral refractive index profile is calculated. We demonstrate the new technique on cancer cells, obtaining nucleus refractive index values that are lower than those of the cytoplasm, coinciding with recent findings. We believe that the proposed technique has the potential to be used for flow cytometry, where full 3-D refractive index tomography is too slow to be implemented during flow.
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Affiliation(s)
- Gili Dardikman
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
| | - Yoav N. Nygate
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
| | - Itay Barnea
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
| | - Nir A. Turko
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
| | - Gyanendra Singh
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
| | - Barham Javidi
- University of Connecticut, Faculty of Engineering, Department of Electrical and Computer Engineering, Storrs 06269-4157, Connecticut, USA
| | - Natan T. Shaked
- Tel Aviv University, Faculty of Engineering, Department of Biomedical Engineering, Tel Aviv 69978, Israel
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23
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Cai B, Zhai X, Wang Z, Shen Y, Xu R, Smith ZJ, Wen Q, Chu K. Optical volumetric projection for fast 3D imaging through circularly symmetric pupil engineering. Biomed Opt Express 2018; 9:437-446. [PMID: 29552384 PMCID: PMC5854049 DOI: 10.1364/boe.9.000437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/09/2017] [Accepted: 12/04/2017] [Indexed: 05/09/2023]
Abstract
Monitoring and manipulating neuronal activities with optical microscopy desires a method where light can be focused or projected over a long axial range so that large brain tissues (>100 [Formula: see text] thick) can be simultaneously imaged, and specific brain regions can be optogenetically stimulated without the need for slow optical refocusing. However, the micron-scale resolution required in neuronal imaging yields a depth of field of less than 10 [Formula: see text] in conventional imaging systems. We propose to use a circularly symmetric phase mask to extend the depth of field. A numerical study shows that our method maintains both the peak and the shape of the point spread function vs the axial position better than current methods. Imaging of a 3D bead suspension and sparsely labelled thick brain tissue confirms the feasibility of the system for fast volumetric imaging.
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Affiliation(s)
- Bo Cai
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Xiaomin Zhai
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Zeguan Wang
- School of Physics, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Yan Shen
- School of Life Sciences, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Ronald Xu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Zachary J. Smith
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Quan Wen
- School of Life Sciences, University of Science and Technology of China, HeFei, Anhui, 230027, China
| | - Kaiqin Chu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, HeFei, Anhui, 230027, China
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24
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Tehrani KF, Pendleton EG, Southern WM, Call JA, Mortensen LJ. Two-photon deep-tissue spatially resolved mitochondrial imaging using membrane potential fluorescence fluctuations. Biomed Opt Express 2018; 9:254-259. [PMID: 29359101 PMCID: PMC5772580 DOI: 10.1364/boe.9.000254] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/04/2017] [Accepted: 12/13/2017] [Indexed: 05/04/2023]
Abstract
Cell metabolism and viability are directly reflected in their mitochondria. Imaging-based analysis of mitochondrial morphological structure, size and dynamic characteristics can therefore provide critical insight into cell function. However, mitochondria are often very abundant, and due to their close to diffraction-limit size, it is often non-trivial to distinguish a tubular or large mitochondrion from an ensemble of punctate mitochondria. In this paper, we use membrane potential dependent fluorescence fluctuations of individual mitochondria to resolve them using an approach similar to single molecule localization microscopy. We use 2-photon microscopy to image mitochondrial intensity fluctuations at 200 μm deep inside an intact in-vivo mouse soleus muscle. By analyzing the acquired images, we can reconstruct images with an extra layer of information about individual mitochondria, separated from their ensemble. Our analysis shows a factor of 14 improvement in detection of mitochondria.
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Affiliation(s)
- Kayvan Forouhesh Tehrani
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA 30602, USA
| | - Emily G. Pendleton
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA 30602, USA
| | | | - Jarrod A. Call
- Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
| | - Luke J. Mortensen
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA 30602, USA
- School of Materials, Chemical, and Biomedical Engineering, University of Georgia, Athens, GA 30602, USA
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25
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Malacrida L, Hedde PN, Ranjit S, Cardarelli F, Gratton E. Visualization of barriers and obstacles to molecular diffusion in live cells by spatial pair-cross-correlation in two dimensions. Biomed Opt Express 2018; 9:303-321. [PMID: 29359105 PMCID: PMC5772584 DOI: 10.1364/boe.9.000303] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 05/09/2023]
Abstract
Despite recent advances in optical super-resolution, we lack a method that can visualize the path followed by diffusing molecules in the cytoplasm or in the nucleus of cells. Fluorescence correlation spectroscopy (FCS) provides molecular dynamics at the single molecule level by averaging the behavior of many molecules over time at a single spot, thus achieving very good statistics but at only one point in the cell. Earlier image-based methods including raster-scan and spatiotemporal image correlation need spatial averaging over relatively large areas, thus compromising spatial resolution. Here, we use spatial pair-cross-correlation in two dimensions (2D-pCF) to obtain relatively high resolution images of molecular diffusion dynamics and transport in live cells. The 2D-pCF method measures the time for a particle to go from one location to another by cross-correlating the intensity fluctuations at specific points in an image. Hence, a visual map of the average path followed by molecules is created.
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Affiliation(s)
- Leonel Malacrida
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, USA
- Área de Investigación Respiratoria, Departamento de Fisiopatología, Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Uruguay
- LM and PNH contributed equally to this work
| | - Per Niklas Hedde
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, USA
- LM and PNH contributed equally to this work
| | - Suman Ranjit
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, USA
| | - Francesco Cardarelli
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, USA
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26
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Hage CH, Leclerc P, Brevier J, Fabert M, Le Nézet C, Kudlinski A, Héliot L, Louradour F. Towards two-photon excited endogenous fluorescence lifetime imaging microendoscopy. Biomed Opt Express 2018; 9:142-156. [PMID: 29359093 PMCID: PMC5772571 DOI: 10.1364/boe.9.000142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/16/2017] [Accepted: 12/04/2017] [Indexed: 05/12/2023]
Abstract
In situ fluorescence lifetime imaging microscopy (FLIM) in an endoscopic configuration of the endogenous biomarker nicotinamide adenine dinucleotide (NADH) has a great potential for malignant tissue diagnosis. Moreover, two-photon nonlinear excitation provides intrinsic optical sectioning along with enhanced imaging depth. We demonstrate, for the first time to our knowledge, nonlinear endogenous FLIM in a fibered microscope with proximal detection, applied to NADH in cultured cells, as a first step to a nonlinear endomicroscope, using a double-clad microstructured fiber with convenient fiber length (> 3 m) and excitation pulse duration (≈50 fs). Fluorescence photons are collected by the fiber inner cladding and we show that its contribution to the impulse response function (IRF), which originates from its intermodal and chromatic dispersions, is small (< 600 ps) and stable for lengths up to 8 m and allows for short lifetime measurements. We use the phasor representation as a quick visualization tool adapted to the endoscopy speed requirements.
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Affiliation(s)
- C. H. Hage
- Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France
| | - P. Leclerc
- Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France
| | - J. Brevier
- Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France
| | - M. Fabert
- Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France
| | - C. Le Nézet
- Univ. Lille, CNRS, UMR 8523 – PhLAM – Physique des Lasers, Atomes et Molécules, F-59000 Lille, France
| | - A. Kudlinski
- Univ. Lille, CNRS, UMR 8523 – PhLAM – Physique des Lasers, Atomes et Molécules, F-59000 Lille, France
| | - L. Héliot
- Univ. Lille, CNRS, UMR 8523 – PhLAM – Physique des Lasers, Atomes et Molécules, F-59000 Lille, France
| | - F. Louradour
- Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France
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27
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Zhang L, Song W, Shao D, Zhang S, Desai M, Ness S, Roy S, Yi J. Volumetric fluorescence retinal imaging in vivo over a 30-degree field of view by oblique scanning laser ophthalmoscopy (oSLO). Biomed Opt Express 2018; 9:25-40. [PMID: 29359085 PMCID: PMC5772579 DOI: 10.1364/boe.9.000025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/24/2017] [Accepted: 11/25/2017] [Indexed: 05/03/2023]
Abstract
While fluorescent contrast is widely used in ophthalmology, three-dimensional (3D) fluorescence retinal imaging over a large field of view (FOV) has been challenging. In this paper, we describe a novel oblique scanning laser ophthalmoscopy (oSLO) technique that provides 3D volumetric fluorescence retinal imaging with only one raster scan. The technique utilizes scanned oblique illumination and angled detection to obtain fluorescent cross-sectional images, analogous to optical coherence tomography (OCT) line scans (or B-scans). By breaking the coaxial optical alignment used in conventional retinal imaging modalities, depth resolution is drastically improved. To demonstrate the capability of oSLO, we have performed in vivo volumetric fluorescein angiography (FA) of the rat retina with ~25μm depth resolution and over a 30° FOV. Using depth segmentation, oSLO can obtain high contrast images of the microvasculature down to single capillaries in 3D. The multi-modal nature of oSLO also allows for seamless combination with simultaneous OCT angiography.
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Affiliation(s)
- Lei Zhang
- Department of Medicine, Boston University School of Medicine, Boston MA, 02118, USA
- These authors contributed equally to this work
| | - Weiye Song
- Department of Medicine, Boston University School of Medicine, Boston MA, 02118, USA
- These authors contributed equally to this work
| | - Di Shao
- Department of Medicine, Boston University School of Medicine, Boston MA, 02118, USA
| | - Sui Zhang
- Danna-Farber Cancer Institute, Boston MA, 02215, USA
| | - Manishi Desai
- Department of Ophthalmology, Boston University School of Medicine, Boston MA, 02118, USA
| | - Steven Ness
- Department of Ophthalmology, Boston University School of Medicine, Boston MA, 02118, USA
| | - Sayon Roy
- Department of Medicine, Boston University School of Medicine, Boston MA, 02118, USA
- Department of Ophthalmology, Boston University School of Medicine, Boston MA, 02118, USA
| | - Ji Yi
- Department of Medicine, Boston University School of Medicine, Boston MA, 02118, USA
- Center of Regenerative Medicine, Boston University, Boston, MA, 02118, USA
- Boston University Photonics Center, Boston MA, 02215, USA
- These authors contributed equally to this work
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28
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Tsakanova G, Arakelova E, Ayvazyan V, Ayvazyan A, Tatikyan S, Aroutiounian R, Dalyan Y, Haroutiunian S, Tsakanov V, Arakelyan A. Two-photon microscopy imaging of oxidative stress in human living erythrocytes. Biomed Opt Express 2017; 8:5834-5846. [PMID: 29296508 PMCID: PMC5745123 DOI: 10.1364/boe.8.005834] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/05/2017] [Accepted: 11/20/2017] [Indexed: 06/07/2023]
Abstract
Red blood cells (RBCs) are known to be the most suitable cells to study oxidative stress, which is implicated in the etiopathology of many human diseases. The goal of the current study was to develop a new effective approach for assessing oxidative stress in human living RBCs using two-photon microscopy. To mimic oxidative stress in human living RBCs, an in vitro model was generated followed by two-photon microscopy imaging. The results revealed that oxidative stress is clearly visible on the two-photon microscopy images of RBCs under oxidative stress compared to no fluorescence in controls (P<0.0001). This novel approach for oxidative stress investigation in human living RBCs could efficiently be applied in clinical research and antioxidant compounds testing.
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Affiliation(s)
- Gohar Tsakanova
- Institute of Molecular Biology of National Academy of Sciences of Republic of Armenia, 7 Hasratyan str., 0014, Yerevan, Armenia
- CANDLE Synchrotron Research Institute, 31 Acharyan str., 0040, Yerevan, Armenia
| | - Elina Arakelova
- Institute of Molecular Biology of National Academy of Sciences of Republic of Armenia, 7 Hasratyan str., 0014, Yerevan, Armenia
| | - Violetta Ayvazyan
- Institute of Molecular Biology of National Academy of Sciences of Republic of Armenia, 7 Hasratyan str., 0014, Yerevan, Armenia
| | - Anna Ayvazyan
- CANDLE Synchrotron Research Institute, 31 Acharyan str., 0040, Yerevan, Armenia
| | - Stepan Tatikyan
- CANDLE Synchrotron Research Institute, 31 Acharyan str., 0040, Yerevan, Armenia
| | - Rouben Aroutiounian
- Institute of Molecular Biology of National Academy of Sciences of Republic of Armenia, 7 Hasratyan str., 0014, Yerevan, Armenia
- Yerevan State University, 1 Alex Manoogian str., 0025, Yerevan, Armenia
| | - Yeva Dalyan
- Yerevan State University, 1 Alex Manoogian str., 0025, Yerevan, Armenia
| | | | - Vasili Tsakanov
- CANDLE Synchrotron Research Institute, 31 Acharyan str., 0040, Yerevan, Armenia
| | - Arsen Arakelyan
- Institute of Molecular Biology of National Academy of Sciences of Republic of Armenia, 7 Hasratyan str., 0014, Yerevan, Armenia
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29
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Zhang Q, Yang X, Hu Q, Bai K, Yin F, Li N, Gang Y, Wang X, Zeng S. High axial resolution imaging system for large volume tissues using combination of inclined selective plane illumination and mechanical sectioning. Biomed Opt Express 2017; 8:5767-5775. [PMID: 29296503 PMCID: PMC5745118 DOI: 10.1364/boe.8.005767] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/06/2017] [Accepted: 09/22/2017] [Indexed: 05/31/2023]
Abstract
To resolve fine structures of biological systems like neurons, it is required to realize microscopic imaging with sufficient spatial resolution in three dimensional systems. With regular optical imaging systems, high lateral resolution is accessible while high axial resolution is hard to achieve in a large volume. We introduce an imaging system for high 3D resolution fluorescence imaging of large volume tissues. Selective plane illumination was adopted to provide high axial resolution. A scientific CMOS working in sub-array mode kept the imaging area in the sample surface, which restrained the adverse effect of aberrations caused by inclined illumination. Plastic embedding and precise mechanical sectioning extended the axial range and eliminated distortion during the whole imaging process. The combination of these techniques enabled 3D high resolution imaging of large tissues. Fluorescent bead imaging showed resolutions of 0.59 μm, 0.47μm, and 0.59 μm in the x, y, and z directions, respectively. Data acquired from the volume sample of brain tissue demonstrated the applicability of this imaging system. Imaging of different depths showed uniform performance where details could be recognized in either the near-soma area or terminal area, and fine structures of neurons could be seen in both the xy and xz sections.
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Affiliation(s)
- Qi Zhang
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Xiong Yang
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qinglei Hu
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Ke Bai
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Fangfang Yin
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Ning Li
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yadong Gang
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Xiaojun Wang
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Shaoqun Zeng
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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30
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Shechtman Y, Gustavsson AK, Petrov PN, Dultz E, Lee MY, Weis K, Moerner WE. Observation of live chromatin dynamics in cells via 3D localization microscopy using Tetrapod point spread functions. Biomed Opt Express 2017; 8:5735-5748. [PMID: 29296501 PMCID: PMC5745116 DOI: 10.1364/boe.8.005735] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/11/2017] [Accepted: 11/11/2017] [Indexed: 05/15/2023]
Abstract
We report the observation of chromatin dynamics in living budding yeast (Saccharomyces cerevisiae) cells, in three-dimensions (3D). Using dual color localization microscopy and employing a Tetrapod point spread function, we analyze the spatio-temporal dynamics of two fluorescently labeled DNA loci surrounding the GAL locus. From the measured trajectories, we obtain different dynamical characteristics in terms of inter-loci distance and temporal variance; when the GAL locus is activated, the 3D inter-loci distance and temporal variance increase compared to the inactive state. These changes are visible in spite of the large thermally- and biologically-driven heterogeneity in the relative motion of the two loci. Our observations are consistent with current euchromatin vs. heterochromatin models.
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Affiliation(s)
- Yoav Shechtman
- Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA
- Currently with the Department of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa, 32000 Israel
| | - Anna-Karin Gustavsson
- Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, SE-171 77, Sweden
| | - Petar N Petrov
- Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA
| | - Elisa Dultz
- Department of Biology, Institute of Biochemistry, Eidgenössische Technische Hochschule Zurich, 8093 Zurich, Switzerland
| | - Maurice Y Lee
- Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA
- Biophysics Program, Stanford University, Stanford, CA 94305, USA
| | - Karsten Weis
- Department of Biology, Institute of Biochemistry, Eidgenössische Technische Hochschule Zurich, 8093 Zurich, Switzerland
| | - W E Moerner
- Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA
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31
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Pant S, Duan Y, Xiong F, Chen N. Augmented line-scan focal modulation microscopy for multi-dimensional imaging of zebrafish heart in vivo. Biomed Opt Express 2017; 8:5698-5707. [PMID: 29296498 PMCID: PMC5745113 DOI: 10.1364/boe.8.005698] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/14/2017] [Accepted: 11/15/2017] [Indexed: 05/18/2023]
Abstract
Multi-dimensional fluorescence imaging of live animal models demands strong optical sectioning, high spatial resolution, fast image acquisition, and minimal photobleaching. While conventional laser scanning microscopes are capable of deep penetration and sub-cellular resolution, they are generally too slow and causing excessive photobleaching for volumetric or time-lapse imaging. We demonstrate the performance of an augmented line-scan focal modulation microscope (aLSFMM), a high-speed imaging platform that affords above video-rate imaging speed by the use of line scanning. Exceptional background rejection is accomplished by combining a confocal slit with focal modulation. The image quality is further improved by merging the information from simultaneously acquired focal modulation and confocal images. Such a hybrid imaging scheme makes it possible to use very low power excitation light in high-speed imaging, and therefore leads to reduced photobleaching that is desirable for three-dimensional (3D) and four-dimensional (4D) in vivo image acquisition.
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32
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Duan X, Li H, Wang F, Li X, Oldham KR, Wang TD. Three-dimensional side-view endomicroscope for tracking individual cells in vivo. Biomed Opt Express 2017; 8:5533-5545. [PMID: 29296486 PMCID: PMC5745101 DOI: 10.1364/boe.8.005533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 05/28/2023]
Abstract
We demonstrate a side-view endomicroscope using a monolithic 3-axis scanner placed in the post-objective position that performs either tilt or piston motion to achieve either optical scan angles >10° or large vertical displacements, respectively. This configuration allows for scaling down of instrument dimensions for high maneuverability and accurate positioning in vivo. Images exceeded either 700 × 600 μm2 in the horizontal plane or vertical depths of 200 μm. Resolution of 1.19 and 3.46 μm was obtained in the horizontal and oblique planes, respectively. Optical sections were collected from dysplastic colonic epithelium in vivo in mice that express tdTomato at 10 Hz to visualize individual cells.
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Affiliation(s)
- Xiyu Duan
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, MI 48109, USA
- These authors contributed equally to this work
| | - Haijun Li
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, MI 48109, USA
- These authors contributed equally to this work
| | - Fa Wang
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xue Li
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kenn R. Oldham
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Thomas D. Wang
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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33
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Hu B, Bolus D, Brown JQ. Improved contrast in inverted selective plane illumination microscopy of thick tissues using confocal detection and structured illumination. Biomed Opt Express 2017; 8:5546-5559. [PMID: 29296487 PMCID: PMC5745102 DOI: 10.1364/boe.8.005546] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/26/2017] [Accepted: 11/09/2017] [Indexed: 05/08/2023]
Abstract
Inverted selective plane illumination microscopy (iSPIM) enables fast, large field-of-view, long term imaging with compatibility with conventional sample mounting. However, the imaging quality can be deteriorated in thick tissues due to sample scattering. Three strategies have been adopted in this paper to optimize the imaging performance of iSPIM on thick tissue imaging: electronic confocal slit detection (eCSD), structured illumination (SI) and the two combined. We compared the image contrast when using SPIM, confocal SPIM (using eCSD alone), SI SPIM (using SI alone) or confocal-SI SPIM (combining both methods) on images of gelatin phantom and highly-scattering fluorescently-stained human tissue. We demonstrate that all the three methods showed remarkable contrast enhancement on both samples compared to iSPIM alone, and SI SPIM and the combined confocal-SI mode outperformed confocal SPIM in contrast enhancement. Moreover, the use of SI at high pattern frequencies outperformed confocal SPIM in terms of optical sectioning capability. However, image signal-to-noise ratio (SNR) was decreased at high pattern frequencies when imaging scattering samples with SI SPIM. By combining eCSD with SI to reduce background signal and noise, the superior optical sectioning performance of SI could be achieved while also maintaining high image SNR.
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34
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Nguyen D, Marchand PJ, Planchette AL, Nilsson J, Sison M, Extermann J, Lopez A, Sylwestrzak M, Sordet-Dessimoz J, Schmidt-Christensen A, Holmberg D, Van De Ville D, Lasser T. Optical projection tomography for rapid whole mouse brain imaging. Biomed Opt Express 2017; 8:5637-5650. [PMID: 29296493 PMCID: PMC5745108 DOI: 10.1364/boe.8.005637] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 05/21/2023]
Abstract
In recent years, three-dimensional mesoscopic imaging has gained significant importance in life sciences for fundamental studies at the whole-organ level. In this manuscript, we present an optical projection tomography (OPT) method designed for imaging of the intact mouse brain. The system features an isotropic resolution of ~50 µm and an acquisition time of four to eight minutes, using a 3-day optimized clearing protocol. Imaging of the brain autofluorescence in 3D reveals details of the neuroanatomy, while the use of fluorescent labels displays the vascular network and amyloid deposition in 5xFAD mice, an important model of Alzheimer's disease (AD). Finally, the OPT images are compared with histological slices.
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Affiliation(s)
- David Nguyen
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Paul J. Marchand
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Arielle L. Planchette
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Julia Nilsson
- Autoimmunity, Department of Experimental Medical Sciences, Lund University Diabetes Centre, 20502 Malmö,
Sweden
| | - Miguel Sison
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Jérôme Extermann
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Antonio Lopez
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Marcin Sylwestrzak
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Jessica Sordet-Dessimoz
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
| | - Anja Schmidt-Christensen
- Autoimmunity, Department of Experimental Medical Sciences, Lund University Diabetes Centre, 20502 Malmö,
Sweden
| | - Dan Holmberg
- Autoimmunity, Department of Experimental Medical Sciences, Lund University Diabetes Centre, 20502 Malmö,
Sweden
| | - Dimitri Van De Ville
- Medical Image Processing Lab, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1202 Genève,
Switzerland
| | - Theo Lasser
- Laboratoire d’Optique Biomédicale, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne,
Switzerland
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35
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Supekar OD, Ozbay BN, Zohrabi M, Nystrom PD, Futia GL, Restrepo D, Gibson EA, Gopinath JT, Bright VM. Two-photon laser scanning microscopy with electrowetting-based prism scanning. Biomed Opt Express 2017; 8:5412-5426. [PMID: 29296477 PMCID: PMC5745092 DOI: 10.1364/boe.8.005412] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 10/31/2017] [Accepted: 11/02/2017] [Indexed: 05/24/2023]
Abstract
Laser scanners are an integral part of high resolution biomedical imaging systems such as confocal or 2-photon excitation (2PE) microscopes. In this work, we demonstrate the utility of electrowetting on dielectric (EWOD) prisms as a lateral laser-scanning element integrated in a conventional 2PE microscope. To the best of our knowledge, this is the first such demonstration for EWOD prisms. EWOD devices provide a transmissive, low power consuming, and compact alternative to conventional adaptive optics, and hence this technology has tremendous potential. We demonstrate 2PE microscope imaging of cultured mouse hippocampal neurons with a FOV of 130 × 130 μm2 using EWOD prism scanning. In addition, we show simulations of the optical system with the EWOD prism, to evaluate the effect of propagating a Gaussian beam through the EWOD prism on the imaging quality. Based on the simulation results a beam size of 0.91 mm full width half max was chosen to conduct the imaging experiments, resulting in a numerical aperture of 0.17 of the imaging system.
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Affiliation(s)
- Omkar D. Supekar
- Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA
| | - Baris N. Ozbay
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, Colorado, 80045, USA
| | - Mo Zohrabi
- Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, CO, 80309, USA
| | - Philip D. Nystrom
- Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA
| | - Gregory L. Futia
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, Colorado, 80045, USA
| | - Diego Restrepo
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, 80045, USA
| | - Emily A. Gibson
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, Colorado, 80045, USA
| | - Juliet T. Gopinath
- Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, CO, 80309, USA
- Department of Physics, University of Colorado, Boulder, CO 80309-0390, USA
| | - Victor M. Bright
- Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA
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36
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Wu C, Le H, Ran S, Singh M, Larina IV, Mayerich D, Dickinson ME, Larin KV. Comparison and combination of rotational imaging optical coherence tomography and selective plane illumination microscopy for embryonic study. Biomed Opt Express 2017; 8:4629-4639. [PMID: 29082090 PMCID: PMC5654805 DOI: 10.1364/boe.8.004629] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/16/2017] [Accepted: 09/16/2017] [Indexed: 05/04/2023]
Abstract
Several optical imaging techniques have been applied for high-resolution embryonic imaging using different contrast mechanisms, each with their own benefits and limitations. In this study, we imaged the same E9.5 mouse embryo with rotational imaging optical coherence tomography (RI-OCT) and selective plane illumination microscopy (SPIM). RI-OCT overcomes optical penetration limits of traditional OCT imaging that prohibit full-body imaging of mouse embryos at later stages by imaging the samples from multiple angles. SPIM enables high-resolution, 3D imaging with less phototoxicity and photobleaching than laser scanning confocal microscopy (LSCM) by illuminating the sample with a focused sheet of light. Side by side comparisons are supplemented with co-registered images. The results demonstrate that SPIM and RI-OCT are highly complementary and could provide more comprehensive tissue characterization for mouse embryonic research.
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Affiliation(s)
- Chen Wu
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
| | - Henry Le
- Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77584, USA
| | - Shihao Ran
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Manmohan Singh
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
| | - Irina V. Larina
- Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77584, USA
| | - David Mayerich
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Mary E. Dickinson
- Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77584, USA
- Equal contribution
| | - Kirill V. Larin
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
- Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77584, USA
- Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk 634050, Russia
- Equal contribution
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37
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Hwang Y, Yoon H, Choe K, Ahn J, Jung JH, Park JH, Kim P. In vivo cellular-level real-time pharmacokinetic imaging of free-form and liposomal indocyanine green in liver. Biomed Opt Express 2017; 8:4706-4716. [PMID: 29082096 PMCID: PMC5654811 DOI: 10.1364/boe.8.004706] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 05/18/2023]
Abstract
Indocyanine green (ICG) is a near-infrared fluorophore approved for human use which has been widely used for various clinical applications. Despite the well-established clinical usage, our understanding about the microscopic in vivo pharmacokinetics of systemically administered ICG has been relatively limited. In this work, we successfully visualized real-time in vivo pharmacokinetic dynamics of the intravenously injected free-form and liposomal ICG in cellular resolution by utilizing a custom-built video-rate near infrared laser-scanning confocal microscopy system. Initial perfusion and clearance from blood stream, diffusion into perisinusoidal space, and subsequent absorption into hepatocyte were directly visualized in vivo. The quantification analysis utilizing the real-time image sequences revealed distinct dynamic in vivo pharmacokinetic behavior of free-form and liposomal ICG.
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Affiliation(s)
- Yoonha Hwang
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Hwanjun Yoon
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Kibaek Choe
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Jinhyo Ahn
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Jik Han Jung
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Ji-Ho Park
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Pilhan Kim
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- KI for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Deahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
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38
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Hedde PN, Malacrida L, Ahrar S, Siryaporn A, Gratton E. sideSPIM - selective plane illumination based on a conventional inverted microscope. Biomed Opt Express 2017; 8:3918-3937. [PMID: 29026679 PMCID: PMC5611913 DOI: 10.1364/boe.8.003918] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/18/2017] [Accepted: 07/18/2017] [Indexed: 05/22/2023]
Abstract
Previously described selective plane illumination microscopy techniques typically offset ease of use and sample handling for maximum imaging performance or vice versa. Also, to reduce cost and complexity while maximizing flexibility, it is highly desirable to implement light sheet microscopy such that it can be added to a standard research microscope instead of setting up a dedicated system. We devised a new approach termed sideSPIM that provides uncompromised imaging performance and easy sample handling while, at the same time, offering new applications of plane illumination towards fluidics and high throughput 3D imaging of multiple specimen. Based on an inverted epifluorescence microscope, all of the previous functionality is maintained and modifications to the existing system are kept to a minimum. At the same time, our implementation is able to take full advantage of the speed of the employed sCMOS camera and piezo stage to record data at rates of up to 5 stacks/s. Additionally, sample handling is compatible with established methods and switching magnification to change the field of view from single cells to whole organisms does not require labor intensive adjustments of the system.
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Affiliation(s)
- Per Niklas Hedde
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
| | - Leonel Malacrida
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
- Área de Investigación Respiratoria, Departamento de Fisiopatología, Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Uruguay
- Analytical Biochemistry and Proteomics Unit, Institut Pasteur of Montevideo, Montevideo, Uruguay
| | - Siavash Ahrar
- Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
- Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, CA, USA
| | - Albert Siryaporn
- Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
- Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, CA, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
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39
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Abrahamsson S, Blom H, Agostinho A, Jans DC, Jost A, Müller M, Nilsson L, Bernhem K, Lambert TJ, Heintzmann R, Brismar H. Multifocus structured illumination microscopy for fast volumetric super-resolution imaging. Biomed Opt Express 2017; 8:4135-4140. [PMID: 28966852 PMCID: PMC5611928 DOI: 10.1364/boe.8.004135] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 08/09/2017] [Accepted: 08/09/2017] [Indexed: 05/04/2023]
Abstract
We here report for the first time the synergistic implementation of structured illumination microscopy (SIM) and multifocus microscopy (MFM). This imaging modality is designed to alleviate the problem of insufficient volumetric acquisition speed in super-resolution biological imaging. SIM is a wide-field super-resolution technique that allows imaging with visible light beyond the classical diffraction limit. Employing multifocus diffractive optics we obtain simultaneous wide-field 3D imaging capability in the SIM acquisition sequence, improving volumetric acquisition speed by an order of magnitude. Imaging performance is demonstrated on biological specimens.
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Affiliation(s)
- Sara Abrahamsson
- Lulu and Anthony Wang Laboratory for Neural Circuits and Behavior, The Rockefeller University New York, NY 10021, USA
| | - Hans Blom
- Department of Applied Physics, KTH (Royal Institute of Technology), Science for Life Laboratory, Stockholm, Sweden
| | - Ana Agostinho
- Department of Cell- and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Daniel C. Jans
- Department of Applied Physics, KTH (Royal Institute of Technology), Science for Life Laboratory, Stockholm, Sweden
| | - Aurelie Jost
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University Jena, Germany
- Leibniz-Institute of Photonic Technology, Jena, Germany
| | - Marcel Müller
- Biomolecular Photonics, Department of Physics, Bielefeld University, Bielefeld, Germany
| | - Linnea Nilsson
- Department of Applied Physics, KTH (Royal Institute of Technology), Science for Life Laboratory, Stockholm, Sweden
| | - Kristoffer Bernhem
- Department of Applied Physics, KTH (Royal Institute of Technology), Science for Life Laboratory, Stockholm, Sweden
| | - Talley J. Lambert
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Rainer Heintzmann
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University Jena, Germany
- Leibniz-Institute of Photonic Technology, Jena, Germany
| | - Hjalmar Brismar
- Department of Applied Physics, KTH (Royal Institute of Technology), Science for Life Laboratory, Stockholm, Sweden
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40
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Yang F, Ozturk MS, Yao R, Intes X. Improving mesoscopic fluorescence molecular tomography through data reduction. Biomed Opt Express 2017; 8:3868-3881. [PMID: 28856056 PMCID: PMC5560847 DOI: 10.1364/boe.8.003868] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/06/2017] [Accepted: 07/20/2017] [Indexed: 05/21/2023]
Abstract
Mesoscopic fluorescence molecular tomography (MFMT) is a novel imaging technique that aims at obtaining the 3-D distribution of molecular probes inside biological tissues at depths of a few millimeters. To achieve high resolution, around 100-150μm scale in turbid samples, dense spatial sampling strategies are required. However, a large number of optodes leads to sizable forward and inverse problems that can be challenging to compute efficiently. In this work, we propose a two-step data reduction strategy to accelerate the inverse problem and improve robustness. First, data selection is performed via signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) criteria. Then principal component analysis (PCA) is applied to further reduce the size of the sensitivity matrix. We perform numerical simulations and phantom experiments to validate the effectiveness of the proposed strategy. In both in silico and in vitro cases, we are able to significantly improve the quality of MFMT reconstructions while reducing the computation times by close to a factor of two.
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Affiliation(s)
- Fugang Yang
- School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China
| | - Mehmet S. Ozturk
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Ruoyang Yao
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Xavier Intes
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
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41
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Wirth D, Kolste K, Kanick S, Roberts DW, Leblond F, Paulsen KD. Fluorescence depth estimation from wide-field optical imaging data for guiding brain tumor resection: a multi-inclusion phantom study. Biomed Opt Express 2017; 8:3656-3670. [PMID: 28856042 PMCID: PMC5560832 DOI: 10.1364/boe.8.003656] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 06/17/2017] [Accepted: 07/01/2017] [Indexed: 05/08/2023]
Abstract
Studies have shown that fluorescent agents demarcate tumor from surrounding brain tissue and offer intraoperative guidance during resection. However, visualization of fluorescence signal from tumor below the surgical surface or through the appearance of blood in the surgical field is challenging. We have previously described red light imaging techniques for estimating fluorescent depths in turbid media. In this study, we evaluate these methods over a broader range of fluorophore concentrations, and investigate the ability to resolve multiple fluorescent emissions in the same plane or at different depths along the axis of imaging. A tungsten halogen lamp is used as a broadband white light source for reflectance imaging. Fluorescence from Alexa Fluor 647 is excited with a 635 nm diode laser. Reflectance and fluorescence spectral data are gathered between 670 and 720 nm with the use of a liquid crystal tunable filter and recorded on a sCMOS camera. Results show that two fluorescent emissions can be resolved within 2 mm if they are in the same plane or within 3 mm if they are at different depths along the axis of imaging up to 6 mm below the surface.
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Affiliation(s)
- Dennis Wirth
- Department of Surgery, Dartmouth-Hitchcock Medical Center, 1 Medical Center Dr. Lebanon, NH 03766, USA
| | - Kolbein Kolste
- Thayer School of Engineering, Dartmouth College, 14 Engineering Dr. Hanover, NH 03755, USA
| | - Stephen Kanick
- Thayer School of Engineering, Dartmouth College, 14 Engineering Dr. Hanover, NH 03755, USA
| | - David W. Roberts
- Section of Neurosurgery, Dartmouth-Hitchcock Medical Center, 1 Medical Center Dr. Lebanon, NH 03766, USA
| | - Frédéric Leblond
- Polytechnique Montreal, Engineering Physics Department, Montreal, Québec H3C 3A7, Canada
| | - Keith D. Paulsen
- Thayer School of Engineering, Dartmouth College, 14 Engineering Dr. Hanover, NH 03755, USA
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42
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Soetikno BT, Shu X, Liu Q, Liu W, Chen S, Beckmann L, Fawzi AA, Zhang HF. Optical coherence tomography angiography of retinal vascular occlusions produced by imaging-guided laser photocoagulation. Biomed Opt Express 2017; 8:3571-3582. [PMID: 28856036 PMCID: PMC5560826 DOI: 10.1364/boe.8.003571] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 05/20/2023]
Abstract
Retinal vascular occlusive diseases represent a major form of vision loss worldwide. Rodent models of these diseases have traditionally relied upon a slit-lamp biomicroscope to help visualize the fundus and subsequently aid delivery of high-power laser shots to a target vessel. Here we describe a multimodal imaging system that can produce, image, and monitor retinal vascular occlusions in rodents. The system combines a spectral-domain optical coherence tomography system for cross-sectional structural imaging and three-dimensional angiography, and a fluorescence scanning laser ophthalmoscope for Rose Bengal monitoring and high-power laser delivery to a target vessel. This multimodal system facilitates the precise production of occlusions in the branched retinal veins, central retinal vein, and branched retinal arteries. Additionally, changes in the retinal morphology and retinal vasculature can be longitudinally documented. With our device, retinal vascular occlusions can be easily and consistently created, which paves the way for futures studies on their pathophysiology and therapeutic targets.
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Affiliation(s)
- Brian T. Soetikno
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
- Department of Ophthalmology, Northwestern University, Chicago, IL, USA
- Medical Scientist Training Program, Northwestern University, Chicago, IL, USA
- These authors contributed equally to this work
| | - Xiao Shu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
- These authors contributed equally to this work
| | - Qi Liu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Wenzhong Liu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Siyu Chen
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Lisa Beckmann
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Amani A. Fawzi
- Department of Ophthalmology, Northwestern University, Chicago, IL, USA
| | - Hao F. Zhang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
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43
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Ranjit S, Dvornikov A, Dobrinskikh E, Wang X, Luo Y, Levi M, Gratton E. Erratum: Measuring the effect of Western diet on liver tissue architecture by FLIM autofluorescence and harmonic generation microscopy: erratum. Biomed Opt Express 2017; 8:3501. [PMID: 28717585 PMCID: PMC5508846 DOI: 10.1364/boe.8.003501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Indexed: 06/07/2023]
Abstract
[This corrects the article on p. 3143 in vol. 8.].
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Affiliation(s)
- Suman Ranjit
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
| | - Alexander Dvornikov
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
| | - Evgenia Dobrinskikh
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Xiaoxin Wang
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Yuhuan Luo
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Moshe Levi
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
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44
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Ranjit S, Dvornikov A, Dobrinskikh E, Wang X, Luo Y, Levi M, Gratton E. Measuring the effect of a Western diet on liver tissue architecture by FLIM autofluorescence and harmonic generation microscopy. Biomed Opt Express 2017; 8:3143-3154. [PMID: 28717559 PMCID: PMC5508820 DOI: 10.1364/boe.8.003143] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 05/13/2017] [Accepted: 05/19/2017] [Indexed: 05/12/2023]
Abstract
The phasor approach to auto-fluorescence lifetime imaging was used to identify and characterize a long lifetime species (LLS) (~7.8 ns) in livers of mice fed with a Western diet. The size of the areas containing this LLS species depends on the type of diet and the size distribution shows Western diet has much larger LLS sizes. Combination of third harmonic generation images with FLIM identified the LLS species with fat droplets and the droplet size distribution was estimated. Second harmonic generation microscopy combined with phasor FLIM shows that there is an increase in fibrosis with a Western diet. A new decomposition in three components of the phasor plot shows that a Western diet is correlated with a higher fraction of free NADH, signifying more reducing condition and more glycolytic condition. Multiparametric analysis of phasor distribution shows that from the distribution of phasor points, a Western diet fed versus a low fat diet fed samples of mice livers can be separated. The phasor approach for the analysis of FLIM images of autofluorescence in liver specimens can result in discovery of new fluorescent species and then these new fluorescent species can help assess tissue architecture. Finally integrating FLIM and second and third harmonic analysis provides a measure of the advancement of fibrosis as an effect of diet.
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Affiliation(s)
- Suman Ranjit
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
| | - Alexander Dvornikov
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
| | - Evgenia Dobrinskikh
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Xiaoxin Wang
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Yuhuan Luo
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Moshe Levi
- Departments of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, CA, USA
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45
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Wang S, Ding M, Chen X, Chang L, Sun Y. Development of bimolecular fluorescence complementation using rsEGFP2 for detection and super-resolution imaging of protein-protein interactions in live cells. Biomed Opt Express 2017; 8:3119-3131. [PMID: 28663931 PMCID: PMC5480454 DOI: 10.1364/boe.8.003119] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/12/2017] [Accepted: 05/12/2017] [Indexed: 05/28/2023]
Abstract
Direct visualization of protein-protein interactions (PPIs) at high spatial and temporal resolution in live cells is crucial for understanding the intricate and dynamic behaviors of signaling protein complexes. Recently, bimolecular fluorescence complementation (BiFC) assays have been combined with super-resolution imaging techniques including PALM and SOFI to visualize PPIs at the nanometer spatial resolution. RESOLFT nanoscopy has been proven as a powerful live-cell super-resolution imaging technique. With regard to the detection and visualization of PPIs in live cells with high temporal and spatial resolution, here we developed a BiFC assay using split rsEGFP2, a highly photostable and reversibly photoswitchable fluorescent protein previously developed for RESOLFT nanoscopy. Combined with parallelized RESOLFT microscopy, we demonstrated the high spatiotemporal resolving capability of a rsEGFP2-based BiFC assay by detecting and visualizing specifically the heterodimerization interactions between Bcl-xL and Bak as well as the dynamics of the complex on mitochondria membrane in live cells.
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Affiliation(s)
- Sheng Wang
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
- Contributed equally to this work
| | - Miao Ding
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
- Contributed equally to this work
| | - Xuanze Chen
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
- Contributed equally to this work
| | - Lei Chang
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Yujie Sun
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
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46
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Kim M, Hong J, Kim J, Shin HJ. Fiber bundle-based integrated platform for wide-field fluorescence imaging and patterned optical stimulation for modulation of vasoconstriction in the deep brain of a living animal. Biomed Opt Express 2017; 8:2781-2795. [PMID: 28663906 PMCID: PMC5480429 DOI: 10.1364/boe.8.002781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/12/2017] [Accepted: 04/25/2017] [Indexed: 05/26/2023]
Abstract
We report a fiber optics-based intravital fluorescence imaging platform that includes epi-fluorescence microscopy and laser patterned-light stimulation system. The platform can perform real-time fluorescence imaging with a lateral resolution of ~4.9 μm while directly inserted into the intact mouse brain, optically stimulate vasoconstriction during real-time imaging, and avoid vessel damage in the penetration path of imaging probe. Using 473-nm patterned-light stimulation, we successfully modulated the vasoconstriction of a single targeted 37-μm-diameter blood vessel located more than 4.7 mm below the brain surface of a live SM22-ChR2 mouse. This platform may permit the hemodynamic studies associated with deeper brain neurovascular disorders.
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Affiliation(s)
- Minkyung Kim
- Center for Bionics, Korea Institute of Science and Technology (KIST), Seoul, South Korea
- Biomedical Engineering, Korea University of Science and Technology, Daejeon, South Korea
| | - Jinki Hong
- Center for Bionics, Korea Institute of Science and Technology (KIST), Seoul, South Korea
- Biomedical Engineering, Korea University of Science and Technology, Daejeon, South Korea
| | - Jinsik Kim
- Department of Medical Biotechnology, College of Life Science and Biotechnology, Dongguk University, Seoul, South Korea
| | - Hyun-joon Shin
- Center for Bionics, Korea Institute of Science and Technology (KIST), Seoul, South Korea
- Biomedical Engineering, Korea University of Science and Technology, Daejeon, South Korea
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47
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Hsu YJ, Chen CC, Huang CH, Yeh CH, Liu LY, Chen SY. Line-scanning hyperspectral imaging based on structured illumination optical sectioning. Biomed Opt Express 2017; 8:3005-3016. [PMID: 28663922 PMCID: PMC5480445 DOI: 10.1364/boe.8.003005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 05/15/2017] [Accepted: 05/15/2017] [Indexed: 05/22/2023]
Abstract
Line-scanning hyperspectral imaging (LHSI) is known to have a higher acquisition rate but lower sectioning capability than point-scanning hyperspectral imaging. To further increase the axial imaging contrast of LHSI, structured illumination was integrated into line excitation to remove the off-focus and scattered on-focus fluorescence signals. In an unsectioned leaf, the imaging contrast can be enhanced by 8 times, while in sectioned mouse skin tissues, a 4.5-fold enhancement can be achieved. With a spectral resolution of 1.15 nm, the fluorophores with seriously-overlapped spectra was proved to be separated without cross-talk by applying linear unmixing to the recorded spectral information.
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Affiliation(s)
- Yu John Hsu
- Department of Optics and Photonics, National Central University, No.300, Zhongda Rd., Zhongli Dist., Taoyuan City 32001, Taiwan
| | - Chih-Chiang Chen
- Department of Dermatology, Taipei Veterans General Hospital, No.201, Sec. 2, Shipai Rd., Beitou Dist., Taipei City 11217, Taiwan
| | - Chien-Hsiang Huang
- Department of Optics and Photonics, National Central University, No.300, Zhongda Rd., Zhongli Dist., Taoyuan City 32001, Taiwan
| | - Chia-Hua Yeh
- Department of Optics and Photonics, National Central University, No.300, Zhongda Rd., Zhongli Dist., Taoyuan City 32001, Taiwan
| | - Li-Ying Liu
- Department of Dermatology, Taipei Veterans General Hospital, No.201, Sec. 2, Shipai Rd., Beitou Dist., Taipei City 11217, Taiwan
| | - Szu-Yu Chen
- Department of Optics and Photonics, National Central University, No.300, Zhongda Rd., Zhongli Dist., Taoyuan City 32001, Taiwan
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48
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Cheng T, Chen D, Yu B, Niu H. Reconstruction of super-resolution STORM images using compressed sensing based on low-resolution raw images and interpolation. Biomed Opt Express 2017; 8:2445-2457. [PMID: 28663883 PMCID: PMC5480490 DOI: 10.1364/boe.8.002445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/31/2017] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
Single-molecule-localization-based super-resolution microscopic technologies, such as stochastic optical reconstruction microscopy (STORM), require lengthy runtimes. Compressed sensing (CS) can partially overcome this inherent disadvantage, but its effect on super-resolution reconstruction has not been thoroughly examined. In CS, measurement matrices play more important roles than reconstruction algorithms. Larger measurement matrices have better restricted isometry properties (RIPs). This paper proposes, analyzes, and compares uses of higher resolution cameras and interpolation to achieve better outcomes. Statistical results demonstrate that super-resolution reconstructions is significantly improved by interpolating low-resolution STORM raw images and using point-spread-function-based measurement matrices with better RIPs. The analysis of publically accessible experimental data confirms this conclusion.
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Affiliation(s)
- Tao Cheng
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Automotive & Transportation Engineering Institute, Guangxi University of Science and Technology, Liuzhou 545006, China
- Shenzhen Key Laboratory of Micro-Nano Measuring and Imaging in Biomedical Optics of Shenzhen, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Danni Chen
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Micro-Nano Measuring and Imaging in Biomedical Optics of Shenzhen, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Bin Yu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Micro-Nano Measuring and Imaging in Biomedical Optics of Shenzhen, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Hanben Niu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Micro-Nano Measuring and Imaging in Biomedical Optics of Shenzhen, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Deceased
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49
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Tang Q, Liu Y, Tsytsarev V, Lin J, Wang B, Kanniyappan U, Li Z, Chen Y. High-dynamic-range fluorescence laminar optical tomography (HDR-FLOT). Biomed Opt Express 2017; 8:2124-2137. [PMID: 28736659 PMCID: PMC5516817 DOI: 10.1364/boe.8.002124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/16/2017] [Accepted: 03/04/2017] [Indexed: 05/21/2023]
Abstract
Three-dimensional fluorescence laminar optical tomography (FLOT) can achieve resolutions of 100-200 µm and penetration depths of 2-3 mm. FLOT has been used in tissue engineering, neuroscience, as well as oncology. The limited dynamic range of the charge-coupled device-based system makes it difficult to image fluorescent samples with a large concentration difference, limits its penetration depth, and diminishes the quantitative accuracy of 3D reconstruction data. Here, incorporating the high-dynamic-range (HDR) method widely used in digital cameras, we present HDR-FLOT, increasing penetration depth and improving the ability to image fluorescent samples with a large concentration difference. The method was tested using an agar phantom and a B6 mouse for brain imaging in vivo.
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Affiliation(s)
- Qinggong Tang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
- Contributed equally
| | - Yi Liu
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
- Contributed equally
| | - Vassiliy Tsytsarev
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Jonathan Lin
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
| | - Bohan Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
| | - Udayakumar Kanniyappan
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
| | - Zhifang Li
- Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Yu Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742 USA
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50
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Dwight JG, Tkaczyk TS. Lenslet array tunable snapshot imaging spectrometer (LATIS) for hyperspectral fluorescence microscopy. Biomed Opt Express 2017; 8:1950-1964. [PMID: 28663875 PMCID: PMC5480590 DOI: 10.1364/boe.8.001950] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/06/2017] [Accepted: 02/17/2017] [Indexed: 05/29/2023]
Abstract
Snapshot hyperspectral imaging augments pixel dwell time and acquisition speeds over existing scanning systems, making it a powerful tool for fluorescence microscopy. While most snapshot systems contain fixed datacube parameters (x,y,λ), our novel snapshot system, called the lenslet array tunable snapshot imaging spectrometer (LATIS), demonstrates tuning its average spectral resolution from 22.66 nm (80x80x22) to 13.94 nm (88x88x46) over 485 to 660 nm. We also describe a fixed LATIS with a datacube of 200x200x27 for larger field-of-view (FOV) imaging. We report <1 sec exposure times and high resolution fluorescence imaging with minimal artifacts.
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Affiliation(s)
- Jason G. Dwight
- Rice University, Department of Bioengineering, 6500 Main St., Houston, TX 77030, USA
| | - Tomasz S. Tkaczyk
- Rice University, Department of Bioengineering, 6500 Main St., Houston, TX 77030, USA
- Rice University, Department of Electrical and Computer Engineering, 6100 Main St., Houston, TX 77005, USA
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