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Vila-Andrés R, Martínez-Espert A, Furlan WD, Esteve-Taboada JJ, Micó V. Non-contact lensless holographic reconstruction of diffractive intraocular lenses profiles. Sci Rep 2025; 15:566. [PMID: 39747332 PMCID: PMC11696758 DOI: 10.1038/s41598-024-84363-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2024] [Accepted: 12/23/2024] [Indexed: 01/04/2025] Open
Abstract
A lensless compact arrangement based on digital in-line holography under Gabor's regime is proposed as a novel contactless method to assess the profile of multifocal intraocular lenses (MIOLs) which are conformed by several diffractive rings. Diffractive MIOLs are a widely adopted ophthalmologic option for the correction of presbyopia in patients undergoing cataract surgery. The MIOL optical design might introduce non-negligible optical performance differences between lenses as well as the introduction of undesirable photic phenomena (such as halos and glare) affecting the vision of users. Therefore, the customized topographic control of each manufactured MIOL model, along with the advancement of optical simulation routines, is increasingly necessary to provide users with optimized performance of these implanted optics, as well as predictable and realistic expectations of their future vision with these solutions. In this manuscript, experimental results of the reconstruction of different smooth and highly edged diffractive profiles from a pair of commercially available MIOLs are presented. Besides, a study evaluating the convergence and robustness of the proposed iterative phase-retrieval routine based on a modified classical Gerchberg-Saxton algorithm is performed. These results provide experimental validation of the proposed technique for accurately measuring the optical profiles of MIOLs.
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Affiliation(s)
- Rosa Vila-Andrés
- Faculty of Physics, Department of Optics and Optometry and Vision Sciences, Universitat de València, Burjassot, Spain.
| | - Anabel Martínez-Espert
- Faculty of Physics, Department of Optics and Optometry and Vision Sciences, Universitat de València, Burjassot, Spain
| | - Walter D Furlan
- Faculty of Physics, Department of Optics and Optometry and Vision Sciences, Universitat de València, Burjassot, Spain
| | - José J Esteve-Taboada
- Faculty of Physics, Department of Optics and Optometry and Vision Sciences, Universitat de València, Burjassot, Spain
| | - Vicente Micó
- Faculty of Physics, Department of Optics and Optometry and Vision Sciences, Universitat de València, Burjassot, Spain
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2
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Bazow B, Lam VK, Phan T, Chung BM, Nehmetallah G, Raub CB. Digital Holographic Microscopy to Assess Cell Behavior. Methods Mol Biol 2023; 2644:247-266. [PMID: 37142927 DOI: 10.1007/978-1-0716-3052-5_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Digital holographic microscopy is an imaging technique particularly well suited to the study of living cells in culture, as no labeling is required and computed phase maps produce high contrast, quantitative pixel information. A full experiment involves instrument calibration, cell culture quality checks, selection and setup of imaging chambers, a sampling plan, image acquisition, phase and amplitude map reconstruction, and parameter map post-processing to extract information about cell morphology and/or motility. Each step is described below, focusing on results from imaging four human cell lines. Several post-processing approaches are detailed, with an aim of tracking individual cells and dynamics of cell populations.
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Affiliation(s)
- Brad Bazow
- Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC, USA
| | - Van K Lam
- Department of Biomedical Engineering, The Catholic University of America, Washington, DC, USA
| | - Thuc Phan
- Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC, USA
| | - Byung Min Chung
- Department of Biology, The Catholic University of America, Washington, DC, USA
| | - George Nehmetallah
- Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC, USA
| | - Christopher B Raub
- Department of Biomedical Engineering, The Catholic University of America, Washington, DC, USA.
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3
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Arcab P, Mirecki B, Stefaniuk M, Pawłowska M, Trusiak M. Experimental optimization of lensless digital holographic microscopy with rotating diffuser-based coherent noise reduction. OPTICS EXPRESS 2022; 30:42810-42828. [PMID: 36522993 DOI: 10.1364/oe.470860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/23/2022] [Indexed: 06/17/2023]
Abstract
Laser-based lensless digital holographic microscopy (LDHM) is often spoiled by considerable coherent noise factor. We propose a novel LDHM method with significantly limited coherent artifacts, e.g., speckle noise and parasitic interference fringes. It is achieved by incorporating a rotating diffuser, which introduces partial spatial coherence and preserves high temporal coherence of laser light, crucial for credible in-line hologram reconstruction. We present the first implementation of the classical rotating diffuser concept in LDHM, significantly increasing the signal-to-noise ratio while preserving the straightforwardness and compactness of the LDHM imaging device. Prior to the introduction of the rotating diffusor, we performed LDHM experimental hardware optimization employing 4 light sources, 4 cameras, and 3 different optical magnifications (camera-sample distances). It was guided by the quantitative assessment of numerical amplitude/phase reconstruction of test targets, conducted upon standard deviation calculation (noise factor quantification), and resolution evaluation (information throughput quantification). Optimized rotating diffuser LDHM (RD-LDHM) method was successfully corroborated in technical test target imaging and examination of challenging biomedical sample (60 µm thick mouse brain tissue slice). Physical minimization of coherent noise (up to 50%) was positively verified, while preserving optimal spatial resolution of phase and amplitude imaging. Coherent noise removal, ensured by proposed RD-LDHM method, is especially important in biomedical inference, as speckles can falsely imitate valid biological features. Combining this favorable outcome with large field-of-view imaging can promote the use of reported RD-LDHM technique in high-throughput stain-free biomedical screening.
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4
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Rogalski M, Cywińska M, Ahmad A, Patorski K, Micó V, Ahluwalia BS, Trusiak M. Hilbert phase microscopy based on pseudo thermal illumination in the Linnik configuration. OPTICS LETTERS 2022; 47:5793-5796. [PMID: 37219105 DOI: 10.1364/ol.471858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 09/18/2022] [Indexed: 05/24/2023]
Abstract
Quantitative phase microscopy (QPM) is often based on recording an object-reference interference pattern and its further phase demodulation. We propose pseudo Hilbert phase microscopy (PHPM) where we combine pseudo thermal light source illumination and Hilbert spiral transform (HST) phase demodulation to achieve hybrid hardware-software-driven noise robustness and an increase in resolution of single-shot coherent QPM. Those advantageous features stem from physically altering the laser spatial coherence and numerically restoring spectrally overlapped object spatial frequencies. The capabilities of PHPM are demonstrated by analyzing calibrated phase targets and live HeLa cells in comparison with laser illumination and phase demodulation via temporal phase shifting (TPS) and Fourier transform (FT) techniques. The performed studies verified the unique ability of PHPM to combine single-shot imaging, noise minimization, and preservation of phase details.
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5
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Mirecki B, Rogalski M, Arcab P, Rogujski P, Stanaszek L, Józwik M, Trusiak M. Low-intensity illumination for lensless digital holographic microscopy with minimized sample interaction. BIOMEDICAL OPTICS EXPRESS 2022; 13:5667-5682. [PMID: 36733749 PMCID: PMC9872902 DOI: 10.1364/boe.464367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 06/18/2023]
Abstract
Exposure to laser light alters cell culture examination via optical microscopic imaging techniques based on label-free coherent digital holography. To mitigate this detrimental feature, researchers tend to use a broader spectrum and lower intensity of illumination, which can decrease the quality of holographic imaging due to lower resolution and higher noise. We study the lensless digital holographic microscopy (LDHM) ability to operate in the low photon budget (LPB) regime to enable imaging of unimpaired live cells with minimized sample interaction. Low-cost off-the-shelf components are used, promoting the usability of such a straightforward approach. We show that recording data in the LPB regime (down to 7 µW of illumination power) does not limit the contrast or resolution of the hologram phase and amplitude reconstruction compared to regular illumination. The LPB generates hardware camera shot noise, however, to be effectively minimized via numerical denoising. The ability to obtain high-quality, high-resolution optical complex field reconstruction was confirmed using the USAF 1951 amplitude sample, phase resolution test target, and finally, live glial restricted progenitor cells (as a challenging strongly absorbing and scattering biomedical sample). The proposed approach based on severely limiting the photon budget in lensless holographic microscopy method can open new avenues in high-throughout (optimal resolution, large field-of-view, and high signal-to-noise-ratio single-hologram reconstruction) cell culture imaging with minimized sample interaction.
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Affiliation(s)
- Bartosz Mirecki
- Warsaw University of Technology, Institute of Micromechanics and Photonics, 8 Sw. A. Boboli St., 02-525 Warsaw, Poland
- Authors contributed equally to this work
| | - Mikołaj Rogalski
- Warsaw University of Technology, Institute of Micromechanics and Photonics, 8 Sw. A. Boboli St., 02-525 Warsaw, Poland
- Authors contributed equally to this work
| | - Piotr Arcab
- Warsaw University of Technology, Institute of Micromechanics and Photonics, 8 Sw. A. Boboli St., 02-525 Warsaw, Poland
- Authors contributed equally to this work
| | - Piotr Rogujski
- NeuroRepair Department, Mossakowski Medical Research Institute, Polish Academy of Sciences, 5 Adolfa Pawinskiego St., 02-106 Warsaw, Poland
| | - Luiza Stanaszek
- NeuroRepair Department, Mossakowski Medical Research Institute, Polish Academy of Sciences, 5 Adolfa Pawinskiego St., 02-106 Warsaw, Poland
| | - Michał Józwik
- Warsaw University of Technology, Institute of Micromechanics and Photonics, 8 Sw. A. Boboli St., 02-525 Warsaw, Poland
| | - Maciej Trusiak
- Warsaw University of Technology, Institute of Micromechanics and Photonics, 8 Sw. A. Boboli St., 02-525 Warsaw, Poland
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6
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Zicha D, Chmelik R. Testing anti-cancer drugs with holographic incoherent-light-source quantitative phase imaging. Methods Enzymol 2022; 679:255-274. [PMID: 36682864 DOI: 10.1016/bs.mie.2022.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Quantitative Phase Imaging is becoming an important tool in the objective evaluation of cellular responses to experimental treatment. The technique is based on interferometric measurements of the optical thickness of cells in tissue culture reporting on the distribution of dry mass inside the cells. As the measurement of the optical thickness is interferometric, it is not subjected to the Abbe resolution limit, and the use of an incoherent-light source further increases the accuracy practically achieving 0.93nm in optical path difference corresponding to 4.6 femtograms/μm2. Holographic mode reduces the exposure in comparison to phase-shifting or phase-stepping interference microscopy and allows observation of faster dynamics. An attractive application is in the development of novel anti-cancer drugs and there is an important potential for pretesting chemotherapeutic drugs with biopsy material for personalized cancer treatment. The procedure involves the preparation of live cells in tissue culture, seeding them into suitable observation chambers, and time-lapse recording with an adjusted microscope. Subsequent image processing and statistical analysis are essential last steps producing the results, which include rapid measurements of cell growth in terms of dry-mass increase in individual cells, speed of cell motility and other dynamic morphometric parameters.
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Affiliation(s)
- Daniel Zicha
- CEITEC-Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic; Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic.
| | - Radim Chmelik
- CEITEC-Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic; Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
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7
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Dohet-Eraly J, Boudjeltia KZ, Rousseau A, Queeckers P, Lelubre C, Desmet JM, Chopard B, Yourassowsky C, Dubois F. Three-dimensional analysis of blood platelet spreading using digital holographic microscopy: a statistical study of the differential effect of coatings in healthy volunteers and dialyzed patients. BIOMEDICAL OPTICS EXPRESS 2022; 13:502-513. [PMID: 35154888 PMCID: PMC8803030 DOI: 10.1364/boe.448817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
In cardiovascular disorders, the study of thrombocytes, commonly known as platelets, is highly important since they are involved in blood clotting, essential in hemostasis, and they can in pathological situations affect the blood circulation. In this paper, single deposited platelets are measured using interferometric digital holographic microscopy. We have shown that the average optical height of platelets is significantly lower in healthy volunteers than in dialyzed patients, meaning a better spreading. It demonstrates the great interest for assessing this parameter in any patients, and therefore the high potential of analyzing single spread platelets using digital holographic microscopy in fundamental research as well as a diagnostic tool in routine laboratories, for usual blood tests.
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Affiliation(s)
- Jérôme Dohet-Eraly
- Laboratory of Experimental Medicine (ULB222), Faculty of Medicine, Université libre de Bruxelles, Centre hospitalier universitaire de Charleroi, 706 Rue de Gozée, 6110 Montigny-le-Tilleul, Belgium
- Microgravity Research Centre, Université libre de Bruxelles, 50 Avenue Franklin Roosevelt, 1050 Bruxelles, Belgium
- These authors contributed equally
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB222), Faculty of Medicine, Université libre de Bruxelles, Centre hospitalier universitaire de Charleroi, 706 Rue de Gozée, 6110 Montigny-le-Tilleul, Belgium
- These authors contributed equally
| | - Alexandre Rousseau
- Laboratory of Experimental Medicine (ULB222), Faculty of Medicine, Université libre de Bruxelles, Centre hospitalier universitaire de Charleroi, 706 Rue de Gozée, 6110 Montigny-le-Tilleul, Belgium
| | - Patrick Queeckers
- Microgravity Research Centre, Université libre de Bruxelles, 50 Avenue Franklin Roosevelt, 1050 Bruxelles, Belgium
| | - Christophe Lelubre
- Laboratory of Experimental Medicine (ULB222), Faculty of Medicine, Université libre de Bruxelles, Centre hospitalier universitaire de Charleroi, 706 Rue de Gozée, 6110 Montigny-le-Tilleul, Belgium
- Department of Internal Medicine, Centre hospitalier universitaire de Charleroi - Hôpital civil Marie Curie, 140 Chaussée de Bruxelles, 6042 Charleroi, Belgium
| | - Jean-Marc Desmet
- Department of Nephrology, Centre hospitalier universitaire de Charleroi - Hôpital Vésale, 706 Rue de Gozée, 6110 Montigny-le-Tilleul, Belgium
| | - Bastien Chopard
- Computer Science Department, University of Geneva, 7 Route de Drize, 1227 Carouge, Switzerland
| | - Catherine Yourassowsky
- Microgravity Research Centre, Université libre de Bruxelles, 50 Avenue Franklin Roosevelt, 1050 Bruxelles, Belgium
| | - Frank Dubois
- Microgravity Research Centre, Université libre de Bruxelles, 50 Avenue Franklin Roosevelt, 1050 Bruxelles, Belgium
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8
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Trusiak M, Cywińska M, Micó V, Picazo-Bueno JÁ, Zuo C, Zdańkowski P, Patorski K. Variational Hilbert Quantitative Phase Imaging. Sci Rep 2020; 10:13955. [PMID: 32811839 PMCID: PMC7435195 DOI: 10.1038/s41598-020-69717-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 07/15/2020] [Indexed: 11/09/2022] Open
Abstract
Utilizing the refractive index as the endogenous contrast agent to noninvasively study transparent cells is a working principle of emerging quantitative phase imaging (QPI). In this contribution, we propose the Variational Hilbert Quantitative Phase Imaging (VHQPI)-end-to-end purely computational add-on module able to improve performance of a QPI-unit without hardware modifications. The VHQPI, deploying unique merger of tailored variational image decomposition and enhanced Hilbert spiral transform, adaptively provides high quality map of sample-induced phase delay, accepting particularly wide range of input single-shot interferograms (from off-axis to quasi on-axis configurations). It especially promotes high space-bandwidth-product QPI configurations alleviating the spectral overlapping problem. The VHQPI is tailored to deal with cumbersome interference patterns related to detailed locally varying biological objects with possibly high dynamic range of phase and relatively low carrier. In post-processing, the slowly varying phase-term associated with the instrumental optical aberrations is eliminated upon variational analysis to further boost the phase-imaging capabilities. The VHQPI is thoroughly studied employing numerical simulations and successfully validated using static and dynamic cells phase-analysis. It compares favorably with other single-shot phase reconstruction techniques based on the Fourier and Hilbert-Huang transforms, both in terms of visual inspection and quantitative evaluation, potentially opening up new possibilities in QPI.
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Affiliation(s)
- Maciej Trusiak
- Institute of Micromechanics and Photonics, Warsaw University of Technology, 8 Sw. A. Boboli St., 02-525, Warsaw, Poland.
| | - Maria Cywińska
- Institute of Micromechanics and Photonics, Warsaw University of Technology, 8 Sw. A. Boboli St., 02-525, Warsaw, Poland.
| | - Vicente Micó
- Departamento de Óptica y de Optometría y Ciencias de la Visión, Facultad de Física, Universitat de Valencia, C/Doctor Moliner 50, 46100, Burjassot, Spain
| | - José Ángel Picazo-Bueno
- Departamento de Óptica y de Optometría y Ciencias de la Visión, Facultad de Física, Universitat de Valencia, C/Doctor Moliner 50, 46100, Burjassot, Spain
| | - Chao Zuo
- Jiangsu Key Laboratory of Spectral Imaging and Intelligence Sense, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, China
| | - Piotr Zdańkowski
- Institute of Micromechanics and Photonics, Warsaw University of Technology, 8 Sw. A. Boboli St., 02-525, Warsaw, Poland
| | - Krzysztof Patorski
- Institute of Micromechanics and Photonics, Warsaw University of Technology, 8 Sw. A. Boboli St., 02-525, Warsaw, Poland
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9
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Rastogi V, Agarwal S, Dubey SK, Khan GS, Shakher C. Design and development of volume phase holographic grating based digital holographic interferometer for label-free quantitative cell imaging. APPLIED OPTICS 2020; 59:3773-3783. [PMID: 32400505 DOI: 10.1364/ao.387620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/15/2020] [Indexed: 06/11/2023]
Abstract
In this paper, a volume phase holographic optical element based digital holographic interferometer is designed and used for quantitative phase imaging of biological cells [white blood cells, red blood cells, platelets, and Staphylococcus aureus (S. aureus) bacteria cells]. The experimental results reveal that sharp images of the S. aureus bacteria cells of the order of ${\sim}{1}\;{\unicode{x00B5}{\rm m}}$∼1µm can be clearly seen. The volume phase holographic grating will remove the stray light from the system reaching toward the grating and will minimize the coherent noise (speckle noise). This will improve the sharpness in the image reconstructed from the recorded digital hologram.
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10
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Duan X, Liu J, Li X, Xue G, Zhao T, Duan J. Novel computer-generated hologram encoding method based on partially temporal coherent light. OPTICS EXPRESS 2019; 27:6851-6862. [PMID: 30876262 DOI: 10.1364/oe.27.006851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Partially temporal coherent light (PTCL) has been applied to holographic reconstruction to reduce speckle noise in display systems, while the encoding methods of computer-generated hologram (CGH), based on PTCL, have not been reported. We propose a novel method to encoding CGH, in which a PTCL with a broadband continuous spectrum is used to illuminate the object image. The continuous spectrum is discretized into different wavelengths and a weight value associated with PTCL power spectrum is assigned to each wavelength. The diffractive transmission is based on Fresnel diffraction theory. The phase distribution of the encoded CGH is obtained using the sum of multiplying the different CGH phase distributions of corresponding discrete wavelengths by the corresponding weight values. The modulation results without iteration are performed to verify the feasibility of the proposed method and the iterative algorithm is introduced to improve the quality of the modulation. The reconstructed images from the proposed encoding method exhibit high quality as compared with that obtained from the encoding method based on ideal temporal coherent light. Numerical simulations and optical experiments are good consistent with each other. The proposed method can provide a reference for various wave-front modulations.
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11
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Ugele M, Weniger M, Stanzel M, Bassler M, Krause SW, Friedrich O, Hayden O, Richter L. Label-Free High-Throughput Leukemia Detection by Holographic Microscopy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800761. [PMID: 30581697 PMCID: PMC6299719 DOI: 10.1002/advs.201800761] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/18/2018] [Indexed: 05/12/2023]
Abstract
Complete blood count and differentiation of leukocytes (DIFF) belong to the most frequently performed laboratory diagnostic tests. Here, a flow cytometry-based method for label-free DIFF of untouched leukocytes by digital holographic microscopy on the rich phase contrast of peripheral leukocyte images, using highly controlled 2D hydrodynamic focusing conditions is reported. Principal component analysis of morphological characteristics of the reconstructed images allows classification of nine leukocyte types, in addition to different types of leukemia and demonstrates disappearance of acute myeloid leukemia cells in remission. To exclude confounding effects, the classification strategy is tested by the analysis of 20 blinded clinical samples. Here, 70% of the specimens are correctly classified with further 20% classifications close to a correct diagnosis. Taken together, the findings indicate a broad clinical applicability of the cytometry method for automated and reagent-free diagnosis of hematological disorders.
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Affiliation(s)
- Matthias Ugele
- In‐Vitro DX and BioscienceDepartment of Strategy and InnovationSiemens Healthcare GmbHGünther‐Scharowsky‐Str. 191058ErlangenGermany
- Department of Chemical and Biological EngineeringInstitute of Medical BiotechnologyFriedrich‐Alexander‐University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Markus Weniger
- In‐Vitro DX and BioscienceDepartment of Strategy and InnovationSiemens Healthcare GmbHGünther‐Scharowsky‐Str. 191058ErlangenGermany
| | - Manfred Stanzel
- In‐Vitro DX and BioscienceDepartment of Strategy and InnovationSiemens Healthcare GmbHGünther‐Scharowsky‐Str. 191058ErlangenGermany
| | - Michael Bassler
- Analysesysteme und SensorikFraunhofer IMMCarl‐Zeiss‐Str. 18‐2055129MainzGermany
| | - Stefan W. Krause
- Medizinische Klinik 5Hämatologie and Internistische OnkologieUlmenweg 1891054ErlangenGermany
| | - Oliver Friedrich
- Department of Chemical and Biological EngineeringInstitute of Medical BiotechnologyFriedrich‐Alexander‐University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Oliver Hayden
- In‐Vitro DX and BioscienceDepartment of Strategy and InnovationSiemens Healthcare GmbHGünther‐Scharowsky‐Str. 191058ErlangenGermany
- Heinz‐Nixdorf‐Chair of Biomedical ElectronicsDepartment of Electrical and Computer EngineeringTranslaTUMCampus Klinikum rechts der IsarTechnical University of MunichIsmaningerstr. 2281675MunichGermany
| | - Lukas Richter
- In‐Vitro DX and BioscienceDepartment of Strategy and InnovationSiemens Healthcare GmbHGünther‐Scharowsky‐Str. 191058ErlangenGermany
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12
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Wu Y, Cheng H, Wen Y, Chen X, Wang Y. Coherent noise reduction of phase images in digital holographic microscopy based on the adaptive anisotropic diffusion. APPLIED OPTICS 2018; 57:5364-5370. [PMID: 30117828 DOI: 10.1364/ao.57.005364] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
The suppression of coherent noise can produce higher-quality reconstructed images in digital holographic microscopy. A robust and effective phase coherent noise denoising algorithm is proposed in this paper that combines the anisotropic diffusion equation and the phase quality map. In order to accurately identify the noise and signal pixels, we introduce the phase quality map and edge detection to quantify the quality of the pixel information. In addition, a synthetic diffusion function is established to control the speed of the anisotropic diffusion process based on the quality coefficient. Several experiments have been carried out to validate the effectiveness of the proposed algorithm for coherent noise reduction. The results demonstrate that the proposed algorithm can reduce coherent noise and preserve edge details well.
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13
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Ugele M, Weniger M, Leidenberger M, Huang Y, Bassler M, Friedrich O, Kappes B, Hayden O, Richter L. Label-free, high-throughput detection of P. falciparum infection in sphered erythrocytes with digital holographic microscopy. LAB ON A CHIP 2018; 18:1704-1712. [PMID: 29796511 DOI: 10.1039/c8lc00350e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Effective malaria treatment requires rapid and accurate diagnosis of infecting species and actual parasitemia. Despite the recent success of rapid tests, the analysis of thick and thin blood smears remains the gold standard for routine malaria diagnosis in endemic areas. For non-endemic regions, sample preparation and analysis of blood smears are an issue due to low microscopy expertise and few cases of imported malaria. Automation of microscopy results could be beneficial to quickly confirm suspected infections in such conditions. Here, we present a label-free, high-throughput method for early malaria detection with the potential to reduce inter-observer variation by reducing sample preparation and analysis effort. We used differential digital holographic microscopy in combination with two-dimensional hydrodynamic focusing for the label-free detection of P. falciparum infection in sphered erythrocytes, with a parasitemia detection limit of 0.01%. Moreover, the achieved differentiation of P. falciparum ring-, trophozoite- and schizont life cycle stages in synchronized cultures demonstrates the potential for future discrimination of even malaria species.
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Affiliation(s)
- Matthias Ugele
- In-Vitro DX & Bioscience, Department of Strategy and Innovation, Siemens Healthcare GmbH, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany.
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14
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Lee JY, Jeon S, Lim JS, Jang SH, Park NC, Kim YJ. Dual-wavelength digital holography with a low-coherence light source based on a quantum dot film. OPTICS LETTERS 2017; 42:5082-5085. [PMID: 29240142 DOI: 10.1364/ol.42.005082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 10/30/2017] [Indexed: 06/07/2023]
Abstract
This Letter proposes a dual-wavelength, low-coherence digital holography system with a single light source, which utilizes a quantum dot (QD) film as a wavelength converter. By changing the size of the QDs, the proposed method easily yields higher and more uniform illumination of any target wavelength, compared with bandpass-filtered light-emitting diodes. Fabrication parameters of the QD film for better conversion efficiency are discussed. Using this light source with the dual-wavelength reconstruction method extends the efficiency and range of nanoscale three-dimensional height measurements.
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15
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Farrokhi H, Rohith TM, Boonruangkan J, Han S, Kim H, Kim SW, Kim YJ. High-brightness laser imaging with tunable speckle reduction enabled by electroactive micro-optic diffusers. Sci Rep 2017; 7:15318. [PMID: 29127389 PMCID: PMC5681511 DOI: 10.1038/s41598-017-15553-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 10/30/2017] [Indexed: 11/30/2022] Open
Abstract
High coherence of lasers is desirable in high-speed, high-resolution, and wide-field imaging. However, it also causes unavoidable background speckle noise thus degrades the image quality in traditional microscopy and more significantly in interferometric quantitative phase imaging (QPI). QPI utilizes optical interference for high-precision measurement of the optical properties where the speckle can severely distort the information. To overcome this, we demonstrated a light source system having a wide tunability in the spatial coherence over 43% by controlling the illumination angle, scatterer's size, and the rotational speed of an electroactive-polymer rotational micro-optic diffuser. Spatially random phase modulation was implemented for the lower speckle imaging with over a 50% speckle reduction without a significant degradation in the temporal coherence. Our coherence control technique will provide a unique solution for a low-speckle, full-field, and coherent imaging in optically scattering media in the fields of healthcare sciences, material sciences and high-precision engineering.
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Affiliation(s)
- Hamid Farrokhi
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, 02114, USA
| | - Thazhe Madam Rohith
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jeeranan Boonruangkan
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Seunghwoi Han
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Hyunwoong Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Seung-Woo Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Young-Jin Kim
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
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16
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Li J, Chen Q, Zhang J, Zhang Y, Lu L, Zuo C. Efficient quantitative phase microscopy using programmable annular LED illumination. BIOMEDICAL OPTICS EXPRESS 2017; 8:4687-4705. [PMID: 29082095 PMCID: PMC5654810 DOI: 10.1364/boe.8.004687] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/12/2017] [Accepted: 09/19/2017] [Indexed: 05/20/2023]
Abstract
In this work, we present an efficient quantitative phase imaging (QPI) approach using programmable annular LED illumination. As a new type of coded light source, the LED array provides flexible illumination control for noninterferometric QPI based on a traditional microscopic configurations. The proposed method modulates the transfer function of system by changing the LED illumination pattern, which provides noise-robust response of transfer function and achieves twice resolution limit of objective NA. The quantitative phase can be recovered from slightly defocused intensity images through inversion of transfer function. Moreover, the weak object transfer function (WOTF) of axis-symmetric oblique source is derived, and the noise-free and noisy simulation results validate the predicted theory. Finally, we experimentally confirm accurate and repeatable performance of our method by imaging calibrated phase samples and cellular specimens with different NA objectives.
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Affiliation(s)
- Jiaji Li
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
- Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
| | - Qian Chen
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
| | - Jialin Zhang
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
- Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
| | - Yan Zhang
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
- Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
| | - Linpeng Lu
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
- Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
| | - Chao Zuo
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, No. 200 Xiaolingwei Street, Nanjing, Jiangsu Province 210094,
China
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
- Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing, Jiangsu Province 210094,
China
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17
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Pan F, Yang L, Xiao W. Coherent noise reduction in digital holographic microscopy by averaging multiple holograms recorded with a multimode laser. OPTICS EXPRESS 2017; 25:21815-21825. [PMID: 29041474 DOI: 10.1364/oe.25.021815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
In digital holographic microscopy (DHM), it is undesirable to observe coherent noise in the reconstructed images. The sources of the noise are mainly the parasitic interference fringes caused by multiple reflections and the speckle pattern caused by the optical scattering on the object surface. Here we propose a noise reduction approach in DHM by averaging multiple holograms recorded with a multimode laser. Based on the periodicity of the temporal coherence of a multimode semiconductor laser, we acquire a series of holograms by changing the optical path length difference between the reference beam and object beam. Because of the use of low coherence light, we can remove the parasitic interference fringes caused by multiple reflections in the holograms. In addition, the coherent noise patterns change in this process due to the different optical paths. Therefore, the coherent noise can be reduced by averaging the multiple reconstructions with uncorrelated noise patterns. Several experiments have been carried out to validate the effectiveness of the proposed approach for coherent noise reduction in DHM. It is shown a remarkable improvement both in amplitude imaging quality and phase measurement accuracy.
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18
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Park G, Han D, Kim G, Shin S, Kim K, Park JK, Park Y. Visualization and label-free quantification of microfluidic mixing using quantitative phase imaging. APPLIED OPTICS 2017; 56:6341-6347. [PMID: 29047833 DOI: 10.1364/ao.56.006341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Microfluidic mixing plays a key role in various fields, including biomedicine and chemical engineering. To date, although various approaches for imaging microfluidic mixing have been proposed, they provide only quantitative imaging capability and require exogenous labeling agents. Quantitative phase imaging techniques, however, circumvent these problems and offer label-free quantitative information about concentration maps of microfluidic mixing. We present the quantitative phase imaging of microfluidic mixing in various types of polydimethylsiloxane microfluidic channels with different geometries; the feasibility of the present method was validated by comparing it with the results obtained by theoretical calculation based on Fick's law.
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Shin S, Kim K, Lee K, Lee S, Park Y. Effects of spatiotemporal coherence on interferometric microscopy. OPTICS EXPRESS 2017; 25:8085-8097. [PMID: 28380929 DOI: 10.1364/oe.25.008085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Illumination coherence plays a major role in various imaging systems, from microscopy, metrology, digital holography, optical coherence tomography, to ultrasound imaging. Here, we present a systematic study on the effects of degrees of spatiotemporal coherence of an illumination (DSTCI) on imaging quality of interferometric microscopy. An optical field with arbitrary DSTCI was decomposed into wavelets with constituent spatiotemporal frequencies, and the effects on image quality were quantitatively investigated. The results show the synergistic effects on reduction of speckle noise when DSTCI is decreased. This study presents a method to systematically control DSTCI, and the result provides an essential reference on the effects of DSTCI on the imaging quality. We believe that the presented methods and results can be implemented in various imaging systems for characterizing and improving the imaging quality.
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Nguyen TH, Edwards C, Goddard LL, Popescu G. Quantitative phase imaging of weakly scattering objects using partially coherent illumination. OPTICS EXPRESS 2016; 24:11683-93. [PMID: 27410094 DOI: 10.1364/oe.24.011683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In this paper, we extend our recent work on partially coherent quantitative phase imaging (pcQPI) from two-dimensional (2D) to three-dimensional (3D) imaging of weakly scattering samples. Due to the mathematical complexity, most theoretical modeling of quantitative phase image formation under partial coherence has focused on thin, well-focused samples. It is unclear how these abberations are affected by defocusing. Also, as 3D QPI techniques continue to develop, a better model needs to be developed to understand and quantify these aberrations when imaging thicker samples. Here, using the first order Born's approximation, we derived a mathematical framework that provides an intuitive model of image formation under varying degrees of coherence. Our description provides a clear connection between the halo effect and phase underestimation, defocusing and the 3D structure of the sample under investigation. Our results agree very well with the experiments and show that the microscope objective defines the sectioning ability of the imaging system while the condenser lens is responsible for the halo effect.
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