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Beloglazova Y, Nikitiuk A, Voronina A, Gagarskikh O, Bayandin Y, Naimark O, Grishko V. Label-Free Single Cell Viability Assay Using Laser Interference Microscopy. BIOLOGY 2021; 10:590. [PMID: 34206974 PMCID: PMC8301067 DOI: 10.3390/biology10070590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 12/20/2022]
Abstract
Laser interference microscopy (LIM) is a promising label-free method for single-cell research applicable to cell viability assessment in the studies of mammalian cells. This paper describes the development of a sensitive and reproducible method for assessing cell viability using LIM. The method, based on associated signal processing techniques, has been developed as a result of real-time investigation in phase thickness fluctuations of viable and non-viable MCF-7 cells, reflecting the presence and absence of their metabolic activity. As evinced by the values of the variable vc, this variable determines the viability of a cell only in the attached state (vc exceeds 20 nm2 for viable attached cells). The critical value of the power spectrum slope βc of the phase thickness fluctuations equals 1.00 for attached MCF-7 cells and 0.71 for suspended cells. The slope of the phase fluctuations' power spectrum for MCF-7 cells was determined to exceed the threshold value of βc for a living cell, otherwise the cell is dead. The results evince the power spectrum slope as the most appropriate indicator of cell viability, while the integrated evaluation criterion (vc and βc values) can be used to assay the viability of attached cells.
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Affiliation(s)
- Yulia Beloglazova
- Perm Federal Scientific Centre, Institute of Technical Chemistry UB RAS, Academician Korolev St. 3, 614013 Perm, Russia; (Y.B.); (A.V.); (O.G.)
| | - Aleksandr Nikitiuk
- Perm Federal Scientific Centre, Institute of Continuous Media Mechanics UB RAS, Academician Korolev St. 1, 614013 Perm, Russia; (A.N.); (Y.B.); (O.N.)
| | - Anna Voronina
- Perm Federal Scientific Centre, Institute of Technical Chemistry UB RAS, Academician Korolev St. 3, 614013 Perm, Russia; (Y.B.); (A.V.); (O.G.)
| | - Olga Gagarskikh
- Perm Federal Scientific Centre, Institute of Technical Chemistry UB RAS, Academician Korolev St. 3, 614013 Perm, Russia; (Y.B.); (A.V.); (O.G.)
| | - Yuriy Bayandin
- Perm Federal Scientific Centre, Institute of Continuous Media Mechanics UB RAS, Academician Korolev St. 1, 614013 Perm, Russia; (A.N.); (Y.B.); (O.N.)
| | - Oleg Naimark
- Perm Federal Scientific Centre, Institute of Continuous Media Mechanics UB RAS, Academician Korolev St. 1, 614013 Perm, Russia; (A.N.); (Y.B.); (O.N.)
| | - Victoria Grishko
- Perm Federal Scientific Centre, Institute of Technical Chemistry UB RAS, Academician Korolev St. 3, 614013 Perm, Russia; (Y.B.); (A.V.); (O.G.)
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Polonschii C, Gheorghiu M, David S, Gáspár S, Melinte S, Majeed H, Kandel ME, Popescu G, Gheorghiu E. High-resolution impedance mapping using electrically activated quantitative phase imaging. LIGHT, SCIENCE & APPLICATIONS 2021; 10:20. [PMID: 33479199 PMCID: PMC7820407 DOI: 10.1038/s41377-020-00461-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/16/2020] [Accepted: 12/29/2020] [Indexed: 05/23/2023]
Abstract
Retrieving electrical impedance maps at the nanoscale rapidly via nondestructive inspection with a high signal-to-noise ratio is an unmet need, likely to impact various applications from biomedicine to energy conversion. In this study, we develop a multimodal functional imaging instrument that is characterized by the dual capability of impedance mapping and phase quantitation, high spatial resolution, and low temporal noise. To achieve this, we advance a quantitative phase imaging system, referred to as epi-magnified image spatial spectrum microscopy combined with electrical actuation, to provide complementary maps of the optical path and electrical impedance. We demonstrate our system with high-resolution maps of optical path differences and electrical impedance variations that can distinguish nanosized, semi-transparent, structured coatings involving two materials with relatively similar electrical properties. We map heterogeneous interfaces corresponding to an indium tin oxide layer exposed by holes with diameters as small as ~550 nm in a titanium (dioxide) over-layer deposited on a glass support. We show that electrical modulation during the phase imaging of a macro-electrode is decisive for retrieving electrical impedance distributions with submicron spatial resolution and beyond the limitations of electrode-based technologies (surface or scanning technologies). The findings, which are substantiated by a theoretical model that fits the experimental data very well enable achieving electro-optical maps with high spatial and temporal resolutions. The virtues and limitations of the novel optoelectrochemical method that provides grounds for a wider range of electrically modulated optical methods for measuring the electric field locally are critically discussed.
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Affiliation(s)
| | | | - Sorin David
- International Centre of Biodynamics, 060101, Bucharest, Romania
| | | | - Sorin Melinte
- Institute of Information and Communication Technologies, Electronics and Applied Mathematics, Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium
| | - Hassaan Majeed
- Quantitative Light Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Mikhail E Kandel
- Quantitative Light Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Gabriel Popescu
- Quantitative Light Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Eugen Gheorghiu
- International Centre of Biodynamics, 060101, Bucharest, Romania.
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Xin Z, Zhang C, Sun L, Wan C, Chen T, Chen H, Wang M, Wang Y, Zhu S, Yuan X. High-performance imaging of cell-substrate contacts using refractive index quantification microscopy. BIOMEDICAL OPTICS EXPRESS 2020; 11:7096-7108. [PMID: 33408982 PMCID: PMC7747918 DOI: 10.1364/boe.409764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 06/12/2023]
Abstract
Non-invasive imaging of living cells is an advanced technique that is widely used in the life sciences and medical research. We demonstrate a refractive index quantification microscopy (RIQM) that enables label-free studies of glioma cell-substrate contacts involving cell adhesion molecules and the extracellular matrix. This microscopy takes advantage of the smallest available spot created when an azimuthally polarized perfect optical vortex beam (POV) is tightly focused with a first-order spiral phase, which results in a relatively high imaging resolution among biosensors. A high refractive index (RI) resolution enables the RI distribution within neuronal cells to be monitored. The microscopy shows excellent capability for recognizing cellular structures and activities, demonstrating great potential in biological sensing and live-cell kinetic imaging.
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Affiliation(s)
- Ziqiang Xin
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Chonglei Zhang
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Lixun Sun
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Chao Wan
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Ting Chen
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Houkai Chen
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Min Wang
- Photonics Center, Shenzhen University, Shenzhen, 518060, China
| | - Yijia Wang
- Institute of Oncology, Tianjin Union Medical Center, Tianjin, 300121, China
| | - Siwei Zhu
- Institute of Oncology, Tianjin Union Medical Center, Tianjin, 300121, China
| | - Xiaocong Yuan
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
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Dai S, Zhang J, Lu H, Xi T, Ma C, Li Y, Di J, Zhao J. Integrated digital holographic microscopy based on surface plasmon resonance. OPTICS EXPRESS 2018; 26:25437-25445. [PMID: 30469645 DOI: 10.1364/oe.26.025437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
We propose a novel digital holographic microscopy (DHM) by integrating surface plasmon holographic microscopy (SPHM) with reflection DHM based on the angular and polarization multiplexing techniques. Taking advantages of the high sensitivity of surface plasmon resonance (SPR) and the high reflectivity of gold film, the tiny variations of specimen's refractive index (RI) can be measured by using SPHM, and meanwhile, the thickness changes of the specimen can be determined by means of reflection DHM. We experimentally monitor the volatilization process of an alcohol-water mixture droplet to verify the validity of the integrated DHM. The proposed microscopy is very promising in the objective-coupling SPR microscopy for multi-information measurements of diverse specimens with low-contrast RI distributions (biomolecules, nanofluids, etc.) in a dynamic and nondestructive way.
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Mandracchia B, Gennari O, Bramanti A, Grilli S, Ferraro P. Label-free quantification of the effects of lithium niobate polarization on cell adhesion via holographic microscopy. JOURNAL OF BIOPHOTONICS 2018; 11:e201700332. [PMID: 29405583 DOI: 10.1002/jbio.201700332] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/31/2018] [Indexed: 06/07/2023]
Abstract
The surface of a c- cut ferroelectric crystal at room temperature is characterized by the so-called screening surface charges, able to compensate the charge due to the spontaneous polarization. Recently, these charges inspired the investigation of the interaction affinity of live cells with lithium niobate and lithium tantalate crystals. However, different knowledge gaps still remain that prevent a reasonable application of these materials for biological applications. Here, a label-free holographic total internal reflection microscopy is shown; the technique is able to evaluate quantitatively the contact area of live fibroblast cells adhering onto the surface of a ferroelectric lithium niobate crystal. The results show values of contact area significantly different between cells adhering onto the positive or negative face of the crystal. This reinforces the reasons for using the polarization charge of these materials to study and/or control cellular processes and, thus, to develop an innovative platform based on polar dielectric functional substrates.
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Affiliation(s)
- Biagio Mandracchia
- Institute of Applied Sciences and Intelligent Systems of the National Research Council (CNR-ISASI), Pozzuoli, Naples, Italy
| | - Oriella Gennari
- Institute of Applied Sciences and Intelligent Systems of the National Research Council (CNR-ISASI), Pozzuoli, Naples, Italy
| | - Alessia Bramanti
- Institute of Applied Sciences and Intelligent Systems of the National Research Council (CNR-ISASI), Pozzuoli, Naples, Italy
| | - Simonetta Grilli
- Institute of Applied Sciences and Intelligent Systems of the National Research Council (CNR-ISASI), Pozzuoli, Naples, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems of the National Research Council (CNR-ISASI), Pozzuoli, Naples, Italy
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Zhang J, Dai S, Ma C, Di J, Zhao J. Compact surface plasmon holographic microscopy for near-field film mapping. OPTICS LETTERS 2017; 42:3462-3465. [PMID: 28957063 DOI: 10.1364/ol.42.003462] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
We develop a compact objective-coupling surface plasmon holographic microscopy with a common-path configuration by introducing a Wollaston prism. Through off-axis hologram recording and numerical reconstruction, amplitude- and phase-contrast surface plasmon resonance (SPR) images can be obtained simultaneously. Based on the four-layer SPR model, the thin film thickness distribution in near field can be mapped unambiguously using a novel demodulation method without a priori knowledge. The technique demonstrates nondestructive and full-field measurement capabilities with sub-nanometer resolution theoretically. Furthermore, owing to the high temporal stability, the recommended system shows great potential for dynamic measurement of near-field tiny refractive index or thickness variation in fields such as chemistry and biomedicine, etc.
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Bianco V, Mandracchia B, Marchesano V, Pagliarulo V, Olivieri F, Coppola S, Paturzo M, Ferraro P. Endowing a plain fluidic chip with micro-optics: a holographic microscope slide. LIGHT, SCIENCE & APPLICATIONS 2017; 6:e17055. [PMID: 30167297 PMCID: PMC6062330 DOI: 10.1038/lsa.2017.55] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 03/22/2017] [Accepted: 03/23/2017] [Indexed: 05/12/2023]
Abstract
Lab-on-a-Chip (LoC) devices are extremely promising in that they enable diagnostic functions at the point-of-care. Within this scope, an important goal is to design imaging schemes that can be used out of the laboratory. In this paper, we introduce and test a pocket holographic slide that allows digital holography microscopy to be performed without an interferometer setup. Instead, a commercial off-the-shelf plastic chip is engineered and functionalized with this aim. The microfluidic chip is endowed with micro-optics, that is, a diffraction grating and polymeric lenses, to build an interferometer directly on the chip, avoiding the need for a reference arm and external bulky optical components. Thanks to the single-beam scheme, the system is completely integrated and robust against vibrations, sharing the useful features of any common path interferometer. Hence, it becomes possible to bring holographic functionalities out of the lab, moving complexity from the external optical apparatus to the chip itself. Label-free imaging and quantitative phase contrast mapping of live samples are demonstrated, along with flexible refocusing capabilities. Thus, a liquid volume can be analyzed in one single shot with no need for mechanical scanning systems.
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Affiliation(s)
- Vittorio Bianco
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
| | - Biagio Mandracchia
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
- Università degli Studi di Napoli ‘Federico II’, P.le Tecchio 80, Napoli 80100, Italy
| | - Valentina Marchesano
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
| | - Vito Pagliarulo
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
| | - Federico Olivieri
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
- Università degli Studi di Napoli ‘Federico II’, P.le Tecchio 80, Napoli 80100, Italy
| | - Sara Coppola
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
| | - Melania Paturzo
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems—Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, Pozzuoli, Napoli 80078, Italy
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Mandracchia B, Gennari O, Marchesano V, Paturzo M, Ferraro P. Label free imaging of cell-substrate contacts by holographic total internal reflection microscopy. JOURNAL OF BIOPHOTONICS 2017; 10:1163-1170. [PMID: 27804236 DOI: 10.1002/jbio.201600177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/31/2016] [Accepted: 10/04/2016] [Indexed: 05/25/2023]
Abstract
The study of cell adhesion contacts is pivotal to understand cell mechanics and interaction at substrates or chemical and physical stimuli. We designed and built a HoloTIR microscope for label-free quantitative phase imaging of total internal reflection. Here we show for the first time that HoloTIR is a good choice for label-free study of focal contacts and of cell/substrate interaction as its sensitivity is enhanced in comparison with standard TIR microscopy. Finally, the simplicity of implementation and relative low cost, due to the requirement of less optical components, make HoloTIR a reasonable alternative, or even an addition, to TIRF microscopy for mapping cell/substratum topography. As a proof of concept, we studied the formation of focal contacts of fibroblasts on three substrates with different levels of affinity for cell adhesion.
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Affiliation(s)
- Biagio Mandracchia
- CNR - ISASI Institute of Applied Sciences and Intelligent Systems, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale - DICMAPI, University of Naples Federico II, Piazzale Tecchio 80, 80100, Napoli, Italy
| | - Oriella Gennari
- CNR - ISASI Institute of Applied Sciences and Intelligent Systems, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
| | - Valentina Marchesano
- CNR - ISASI Institute of Applied Sciences and Intelligent Systems, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
| | - Melania Paturzo
- CNR - ISASI Institute of Applied Sciences and Intelligent Systems, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
| | - Pietro Ferraro
- CNR - ISASI Institute of Applied Sciences and Intelligent Systems, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
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Mandracchia B, Bianco V, Wang Z, Mugnano M, Bramanti A, Paturzo M, Ferraro P. Holographic microscope slide in a spatio-temporal imaging modality for reliable 3D cell counting. LAB ON A CHIP 2017; 17:2831-2838. [PMID: 28722051 DOI: 10.1039/c7lc00414a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In the current trend of miniaturization and simplification of imaging flow cytometry, Lab-on-a-Chip (LoC) microfluidic devices represent an innovative and cost-effective solution. In this framework, we propose for the first time a novel platform based on the compactness of a holographic microscope slide (HMS) in combination with the new computational features of space-time digital holography (STDH) that uses a 1D linear sensor array (LSA) instead of 2D CCD or CMOS cameras to respond to real diagnostic needs. In this LoC platform, computational methods, holography, and microfluidics are intertwined in order to provide an imaging system with a reduced amount of optical components and capability to achieve reliable cell counting even in the absence of very accurate flow control. STDH exploits the sample motion into the microfluidic channel to obtain an unlimited field-of-view along the flow direction, independent of the magnification factor. Furthermore, numerical refocusing typical of a holographic modality allows imaging and visualization of the entire volume of the channel, thus avoiding loss of information due to the limited depth of focus of standard microscopes. Consequently, we believe that this platform could open new perspectives for enhancing the throughput by 3D volumetric imaging.
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Affiliation(s)
- Biagio Mandracchia
- Institute of Applied Sciences and Intelligent Systems-Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy.
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Near-Membrane Refractometry Using Supercritical Angle Fluorescence. Biophys J 2017; 112:1940-1948. [PMID: 28494964 DOI: 10.1016/j.bpj.2017.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/08/2017] [Accepted: 03/13/2017] [Indexed: 12/20/2022] Open
Abstract
Total internal reflection fluorescence (TIRF) microscopy and its variants are key technologies for visualizing the dynamics of single molecules or organelles in live cells. Yet truly quantitative TIRF remains problematic. One unknown hampering the interpretation of evanescent-wave excited fluorescence intensities is the undetermined cell refractive index (RI). Here, we use a combination of TIRF excitation and supercritical angle fluorescence emission detection to directly measure the average RI in the "footprint" region of the cell during image acquisition. Our RI measurement is based on the determination on a back-focal plane image of the critical angle separating evanescent and far-field fluorescence emission components. We validate our method by imaging mouse embryonic fibroblasts and BON cells. By targeting various dyes and fluorescent-protein chimeras to vesicles, the plasma membrane, as well as mitochondria and the endoplasmic reticulum, we demonstrate local RI measurements with subcellular resolution on a standard TIRF microscope, with a removable Bertrand lens as the only modification. Our technique has important applications for imaging axial vesicle dynamics and the mitochondrial energy state or detecting metabolically more active cancer cells.
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Zhang J, Dai S, Ma C, Di J, Zhao J. Common-path digital holographic microscopy for near-field phase imaging based on surface plasmon resonance. APPLIED OPTICS 2017; 56:3223-3228. [PMID: 28414385 DOI: 10.1364/ao.56.003223] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We develop a common-path digital holographic microscopy based on prism-coupling surface plasmon resonance (SPR) for near-field phase imaging. A single beam splitter with specific configuration is introduced in an SPR imaging system to realize off-axis holographic recording. By measuring the phase shift difference of the reflected light at SPR exploiting the proposed holographic microscopy with high temporal stability, near-field characteristic measurement can be realized. With its simplicity, vibration isolation, and inherent capability of phase curvature compensation, the recommended system shows advanced performance in monitoring tiny refractive index variations and imaging biological tissues.
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Giansanti D, Pochini M, Giovagnoli MR. Integration of tablet technologies in the e-laboratory of cytology: a health technology assessment. Telemed J E Health 2016; 20:909-15. [PMID: 25290667 DOI: 10.1089/tmj.2013.0235] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION Although tablet systems are becoming a powerful technology, particularly useful in every application of medical imaging, to date no one has investigated the acceptance and performance of this technology in digital cytology. The specific aims of the work were (1) to design a health technology assessment (HTA) tool to assess, in terms of performance and acceptance, the introduction of tablet technologies (wearable, portable, and non portable) in the e-laboratories of cytology and (2) to test the tool in a first significant application of digital cytology. MATERIALS AND METHODS An HTA tool was proposed operating on a domain of five dimensions of investigation comprising the basic information of the product of digital cytology, the perceived subjective quality of images, the assessment of the virtual navigation on the e-slide, the assessment of the information and communication technologies features, and the diagnostic power. Six e-slides regarding studies of cervicovaginal cytology digitalized by means of an Aperio ( www.aperio.com ) scanner and uploaded onto the www.digitalslide.it Web site were used for testing the methodology on three different network connections. RESULTS Three experts of cytology successfully tested the methodology on seven tablets found suitable for the study in their own standard configuration. Specific indexes furnished by the tool indicated both a high degree of performance and subjective acceptance of the investigated technology. CONCLUSIONS The HTA tool thus could be useful to investigate new tablet technologies in digital cytology and furnish stakeholders with useful information that may help them make decisions involving the healthcare system. From a global point of view the study demonstrates the feasibility of using the tablet technology in digital cytology.
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Zhang J, Ma C, Dai S, Di J, Li Y, Xi T, Zhao J. Transmission and total internal reflection integrated digital holographic microscopy. OPTICS LETTERS 2016; 41:3844-3847. [PMID: 27519104 DOI: 10.1364/ol.41.003844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We develop a transmission and total internal reflection (TIR) integrated digital holographic microscopy (DHM) by introducing a home-made Dove prism with a polished short side. With the help of angular and polarization multiplexing techniques, the 2D refractive index distribution of a specimen adhered on the prism surface is determined using TIR-DHM. Meanwhile, the thickness profile is unambiguously calculated from the phase information using transmission DHM. This integrated microscopy is nondestructive and dynamic and can be used to simultaneously measure the index distribution and thickness profile of transparent or semi-transparent liquid or solid samples.
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Sridharan S, Katz A, Soto-Adames F, Popescu G. Quantitative phase imaging of arthropods. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:111212. [PMID: 26334858 PMCID: PMC4689101 DOI: 10.1117/1.jbo.20.11.111212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 07/06/2015] [Indexed: 06/05/2023]
Abstract
Classification of arthropods is performed by characterization of fine features such as setae and cuticles. An unstained whole arthropod specimen mounted on a slide can be preserved for many decades, but is difficult to study since current methods require sample manipulation or tedious image processing. Spatial light interference microscopy (SLIM) is a quantitative phase imaging (QPI) technique that is an add-on module to a commercial phase contrast microscope. We use SLIM to image a whole organism springtail Ceratophysella denticulata mounted on a slide. This is the first time, to our knowledge, that an entire organism has been imaged using QPI. We also demonstrate the ability of SLIM to image fine structures in addition to providing quantitative data that cannot be obtained by traditional bright field microscopy.
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Affiliation(s)
- Shamira Sridharan
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, Quantitative Light Imaging Laboratory, Department of Bioengineering, 405 North Matthews Avenue, Urbana, Illinois 61801, United States
| | - Aron Katz
- University of Illinois at Urbana-Champaign, Department of Entomology, 606 East Healey Street, Champaign, Illinois 61820, United States
| | - Felipe Soto-Adames
- University of Illinois at Urbana-Champaign, Department of Entomology, 606 East Healey Street, Champaign, Illinois 61820, United States
| | - Gabriel Popescu
- University of Illinois at Urbana-Champaign, Beckman Institute of Advanced Science and Technology, Quantitative Light Imaging Laboratory, Department of Bioengineering, 405 North Matthews Avenue, Urbana, Illinois 61801, United States
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15
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Calabuig A, Matrecano M, Paturzo M, Ferraro P. Common-path configuration in total internal reflection digital holography microscopy. OPTICS LETTERS 2014; 39:2471-2474. [PMID: 24979021 DOI: 10.1364/ol.39.002471] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Total Internal Reflection Digital Holographic Microscopy (TIRDHM) is recognized to be a powerful tool for retrieving quantitative phase images of cell-substrate interfaces, adhesions, and tissue structures close to the prism surface. In this Letter, we develop an improved TIRDHM system, taking advantage of a refractive index mismatch between the prism and the sample substrate, to allow phase-shifting DH with just a single-beam interferometric configuration. Instead of the traditional off-axis method, phase-shift method is used to retrieve amplitude and phase images in coherent light and TIR modality. Essentially, the substrate-prism interface acts like a beam splitter generating a reference beam, where the phase-shift dependence on the incident angle is exploited in this common-path configuration. With the aim to demonstrate the technique's validity, some experiments are performed to establish the advantage of this compact and simple configuration, in which the reference arm in the setup is avoided.
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Boschetto A, Pochini M, Bottini L, Giovagnoli M, Giansanti D. The focus emulation and image enhancement in digital cytology: an experience using the software Mathematica. COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING: IMAGING & VISUALIZATION 2014. [DOI: 10.1080/21681163.2014.885852] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Giansanti D, Boschetto A, Pochini M, Bottini L, Giovagnoli MR. Design of a process for image improvement in digital cytology: a preliminary technology assessement. COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING: IMAGING & VISUALIZATION 2014. [DOI: 10.1080/21681163.2014.883940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pham HV, Edwards C, Goddard LL, Popescu G. Fast phase reconstruction in white light diffraction phase microscopy. APPLIED OPTICS 2013; 52:A97-A101. [PMID: 23292428 DOI: 10.1364/ao.52.000a97] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 09/26/2012] [Indexed: 05/27/2023]
Abstract
In off-axis interferometry, we usually have to deal with the unwrapping process, which is very computationally intensive and prevents us from real time phase reconstruction. The wrapping problem usually occurs when imaging thick objects, which introduce phase shifts of more than 2π radians. However, in off-axis interferometry, the nonzero angle of interference of the two beams creates a ramp in the phase across the image that can produce phase wrapping errors. In this paper, we propose a simple technique that avoids the need for the unwrapping step in reconstructing quantitative phase images in white light diffraction phase microscopy of thin samples. We show that this approach can improve significantly the phase reconstruction speed and allow high impact applications, such as real-time blood testing.
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Affiliation(s)
- Hoa V Pham
- Quantitative Light Imaging Laboratory, Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science & Technology, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, USA
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Wan Y, Ash WM, Fan L, Hao H, Kim MK, Lin J. Variable-angle total internal reflection fluorescence microscopy of intact cells of Arabidopsis thaliana. PLANT METHODS 2011; 7:27. [PMID: 21943324 PMCID: PMC3219692 DOI: 10.1186/1746-4811-7-27] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Accepted: 09/24/2011] [Indexed: 05/18/2023]
Abstract
BACKGROUND Total internal reflection fluorescence microscopy (TIRFM) is a powerful tool for observing fluorescently labeled molecules on the plasma membrane surface of animal cells. However, the utility of TIRFM in plant cell studies has been limited by the fact that plants have cell walls, thick peripheral layers surrounding the plasma membrane. Recently, a new technique known as variable-angle epifluorescence microscopy (VAEM) was developed to circumvent this problem. However, the lack of a detailed analysis of the optical principles underlying VAEM has limited its applications in plant-cell biology. RESULTS Here, we present theoretical and experimental evidence supporting the use of variable-angle TIRFM in observations of intact plant cells. We show that when total internal reflection occurs at the cell wall/cytosol interface with an appropriate angle of incidence, an evanescent wave field of constant depth is produced inside the cytosol. Results of experimental TIRFM observations of the dynamic behaviors of phototropin 1 (a membrane receptor protein) and clathrin light chain (a vesicle coat protein) support our theoretical analysis. CONCLUSIONS These findings demonstrate that variable-angle TIRFM is appropriate for quantitative live imaging of cells in intact tissues of Arabidopsis thaliana.
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Affiliation(s)
- Yinglang Wan
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - William M Ash
- Digital Holography and Microscopy Laboratory, Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Lusheng Fan
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Gradual School of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huaiqin Hao
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Myung K Kim
- Digital Holography and Microscopy Laboratory, Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Jinxing Lin
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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