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Yu L, Wang Y, Wang Y, Zhuo K, Ma Y, Liu M, Zheng J, Li J, Li J, Gao P. Phase image correlation spectroscopy for detecting microfluidic dynamics. APPLIED OPTICS 2022; 61:5944-5950. [PMID: 36255833 DOI: 10.1364/ao.458026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 06/12/2022] [Indexed: 06/16/2023]
Abstract
It is essential to quantify the physical properties and the dynamics of flowing particles in many fields, especially in microfluidic-related applications. We propose phase image correlation spectroscopy (PICS) as a versatile tool to quantify the concentration, hydro-diameter, and flow velocity of unlabeled particles by correlating the pixels of the phase images taken on flowing particles in a microfluidic device. Compared with conventional image correlation spectroscopy, PICS is minimally invasive, relatively simple, and more efficient, since it utilizes the intrinsic phase of the particles to provide a contrast instead of fluorescent labeling. We demonstrate the feasibility of PICS by measuring flowing polymethylmethacrylate (PMMA) microspheres and yeast in a microfluidic device. We can envisage that PICS will become an essential inspection tool in biomedicine and industry.
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Yu C, Li S, Wei C, Dai S, Liang X, Li J. A Cost-Effective Nucleic Acid Detection System Using a Portable Microscopic Device. MICROMACHINES 2022; 13:mi13060869. [PMID: 35744483 PMCID: PMC9227208 DOI: 10.3390/mi13060869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/25/2022] [Accepted: 05/30/2022] [Indexed: 11/22/2022]
Abstract
A fluorescence microscope is one of the most important tools for biomedical research and laboratory diagnosis. However, its high cost and bulky size hinder the application of laboratory microscopes in space-limited and low-resource applications. Here, in this work, we proposed a portable and cost-effective fluorescence microscope. Assembled from a set of 3D print components and a webcam, it consists of a three-degree-of-freedom sliding platform and a microscopic imaging system. The microscope is capable of bright-field and fluorescence imaging with micron-level resolution. The resolution and field of view of the microscope were evaluated. Compared with a laboratory-grade inverted fluorescence microscope, the portable microscope shows satisfactory performance, both in the bright-field and fluorescence mode. From the configurations of local resources, the microscope costs around USD 100 to assemble. To demonstrate the capability of the portable fluorescence microscope, we proposed a quantitative polymerase chain reaction experiment for meat product authenticating applications. The portable and low-cost microscope platform demonstrates the benefits in space-constrained environments and shows high potential in telemedicine, point-of-care testing, and more.
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Affiliation(s)
- Chengzhuang Yu
- Hebei Key Laboratory of Smart Sensing and Human-Robot Interactions, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China; (C.Y.); (C.W.)
| | - Shanshan Li
- Hebei Key Laboratory of Smart Sensing and Human-Robot Interactions, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China; (C.Y.); (C.W.)
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
- Correspondence: (S.L.); (S.D.); (J.L.)
| | - Chunyang Wei
- Hebei Key Laboratory of Smart Sensing and Human-Robot Interactions, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China; (C.Y.); (C.W.)
| | - Shijie Dai
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
- Correspondence: (S.L.); (S.D.); (J.L.)
| | - Xinyi Liang
- Institute of Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin 300130, China;
| | - Junwei Li
- Institute of Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin 300130, China;
- Correspondence: (S.L.); (S.D.); (J.L.)
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Mac KD, Qureshi MM, Na M, Chang S, Eom TJ, Je HS, Kim YR, Kwon HS, Chung E. Fast volumetric imaging with line-scan confocal microscopy by electrically tunable lens at resonant frequency. OPTICS EXPRESS 2022; 30:19152-19164. [PMID: 36221700 PMCID: PMC9363030 DOI: 10.1364/oe.450745] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 05/20/2023]
Abstract
In microscopic imaging of biological tissues, particularly real-time visualization of neuronal activities, rapid acquisition of volumetric images poses a prominent challenge. Typically, two-dimensional (2D) microscopy can be devised into an imaging system with 3D capability using any varifocal lens. Despite the conceptual simplicity, such an upgrade yet requires additional, complicated device components and usually suffers from a reduced acquisition rate, which is critical to properly document rapid neurophysiological dynamics. In this study, we implemented an electrically tunable lens (ETL) in the line-scan confocal microscopy (LSCM), enabling the volumetric acquisition at the rate of 20 frames per second with a maximum volume of interest of 315 × 315 × 80 µm3. The axial extent of point-spread-function (PSF) was 17.6 ± 1.6 µm and 90.4 ± 2.1 µm with the ETL operating in either stationary or resonant mode, respectively, revealing significant depth axial penetration by the resonant mode ETL microscopy. We further demonstrated the utilities of the ETL system by volume imaging of both cleared mouse brain ex vivo samples and in vivo brains. The current study showed a successful application of resonant ETL for constructing a high-performance 3D axially scanning LSCM (asLSCM) system. Such advances in rapid volumetric imaging would significantly enhance our understanding of various dynamic biological processes.
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Affiliation(s)
- Khuong Duy Mac
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | | | - Myeongsu Na
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, 03080 Seoul, Republic of Korea
| | - Sunghoe Chang
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, 03080 Seoul, Republic of Korea
- Neuroscience Research Institute, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, 03080 Seoul, Republic of Korea
| | - Tae Joong Eom
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
- Engineering Research Center (ERC) for Color-modulated Extra-sensory Perception Technology, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyunsoo Shawn Je
- Signature Program in Neuroscience and Behavioural Disorders, Duke-National University of Singapore (NUS) Medical School, 8 College Road 169857, Singapore
- Advanced Bioimaging Center, Academia, Ngee Ann Kongsi Discovery Tower Level 10, 20 College Road, 169855, Singapore
| | - Young Ro Kim
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
- Department of Radiology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Hyuk-Sang Kwon
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Euiheon Chung
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
- AI Graduate School, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
- Research Center for Photon Science Technology, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
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Hu H, Lin Y, Li X, Qi P, Liu T. IPLNet: a neural network for intensity-polarization imaging in low light. OPTICS LETTERS 2020; 45:6162-6165. [PMID: 33186940 DOI: 10.1364/ol.409673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
Imaging in low light is significant but challenging in many applications. Adding the polarization information into the imaging system compromises the drawbacks of the conventional intensity imaging to some extent. However, generally speaking, the qualities of intensity images and polarization images cannot be compatible due to the characteristic differences in polarimetric operators. In this Letter, we collected, to the best of our knowledge, the first polarimetric imaging dataset in low light and present a specially designed neural network to enhance the image qualities of intensity and polarization simultaneously. Both indoor and outdoor experiments demonstrate the effectiveness and superiority of this neural network-based solution, which may find important applications for object detection and vision in photon-starved environments.
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Kumar M, Quan X, Awatsuji Y, Tamada Y, Matoba O. Digital Holographic Multimodal Cross-Sectional Fluorescence and Quantitative Phase Imaging System. Sci Rep 2020; 10:7580. [PMID: 32415184 PMCID: PMC7228964 DOI: 10.1038/s41598-020-64028-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/03/2020] [Indexed: 12/29/2022] Open
Abstract
We present a multimodal imaging system based on simple off-axis digital holography, for simultaneous recording and retrieval of cross-sectional fluorescence and quantitative phase imaging of the biological specimen. Synergism in the imaging capabilities can be achieved by incorporating two off-axis digital holographic microscopes integrated to record different information at the same time. The cross-sectional fluorescence imaging is realized by a common-path configuration of the single-shot off-axis incoherent digital holographic system. The quantitative phase imaging, on the other hand, is achieved by another off-axis coherent digital holographic microscopy operating in transmission mode. The fundamental characteristics of the proposed multimodal system are confirmed by performing various experiments on fluorescent beads and fluorescent protein-labeled living cells of the moss Physcomitrella patens lying at different axial depth positions. Furthermore, the cross-sectional live fluorescence and phase imaging of the fluorescent beads are demonstrated by the proposed multimodal system. The experimental results presented here corroborate the feasibility of the proposed system and indicate its potential in the applications to analyze the functional and structural behavior of biological cells and tissues.
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Affiliation(s)
- Manoj Kumar
- Graduate School of System Informatics, Kobe University, Rokkodai 1-1, Nada, Kobe, 657-8501, Japan.
| | - Xiangyu Quan
- Graduate School of System Informatics, Kobe University, Rokkodai 1-1, Nada, Kobe, 657-8501, Japan
| | - Yasuhiro Awatsuji
- Faculty of Electrical Engineering and Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Yosuke Tamada
- School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, 321-8585, Japan
- National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, 444-8585, Japan
- School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigonaka, Myodaiji, Okazaki, 444-8585, Japan
- Center for Optical Research and Education (CORE), Utsunomiya University, 7-1-2 Yoto, Utsunomiya, 321-8585, Japan
| | - Osamu Matoba
- Graduate School of System Informatics, Kobe University, Rokkodai 1-1, Nada, Kobe, 657-8501, Japan.
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Rajput SK, Kumar M, Quan X, Morita M, Furuyashiki T, Awatsuji Y, Tajahuerce E, Matoba O. Three-dimensional fluorescence imaging using the transport of intensity equation. JOURNAL OF BIOMEDICAL OPTICS 2019; 25:1-7. [PMID: 31721541 PMCID: PMC7010985 DOI: 10.1117/1.jbo.25.3.032004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 09/04/2019] [Indexed: 06/01/2023]
Abstract
We propose a nonscanning three-dimensional (3-D) fluorescence imaging technique using the transport of intensity equation (TIE) and free-space Fresnel propagation. In this imaging technique, a phase distribution corresponding to defocused fluorescence images with a point-light-source-like shape is retrieved by a TIE-based phase retrieval algorithm. From the obtained phase distribution, and its corresponding amplitude distribution, of the defocused fluorescence image, various images at different distances can be reconstructed at the desired plane after Fresnel propagation of the complex wave function. Through the proposed imaging approach, the 3-D fluorescence imaging can be performed in multiple planes. The fluorescence intensity images are captured with the help of an electrically tunable lens; hence, the imaging technique is free from motion artifacts. We present experimental results corresponding to microbeads and a biological sample to demonstrate the proposed 3-D fluorescence imaging technique.
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Affiliation(s)
- Sudheesh K. Rajput
- Kobe University, Graduate School of System Informatics, Department of Systems Science, Nada, Kobe, Japan
| | - Manoj Kumar
- Kobe University, Graduate School of System Informatics, Department of Systems Science, Nada, Kobe, Japan
| | - Xiangyu Quan
- Kobe University, Graduate School of System Informatics, Department of Systems Science, Nada, Kobe, Japan
| | - Mitsuhiro Morita
- Kobe University, Graduate School of Sciences, Department of Biology, Nada, Kobe, Japan
| | - Tomoyuki Furuyashiki
- Kobe University, Graduate School of Medicine, Division of Pharmacology, Chuo-ku, Kobe, Japan
- AMED-CREST, Chiyoda-ku, Tokyo, Japan
| | - Yasuhiro Awatsuji
- Kyoto Institute of Technology, Faculty of Electrical Engineering and Electronics, Matsugasaki, Sakyo-ku, Kyoto, Japan
| | - Enrique Tajahuerce
- Universitat Jaume I, Institute of New Imaging Technologies (INIT), Department of Physics, Castello, Spain
| | - Osamu Matoba
- Kobe University, Graduate School of System Informatics, Department of Systems Science, Nada, Kobe, Japan
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