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Huang Z, Cao L. Quantitative phase imaging based on holography: trends and new perspectives. LIGHT, SCIENCE & APPLICATIONS 2024; 13:145. [PMID: 38937443 PMCID: PMC11211409 DOI: 10.1038/s41377-024-01453-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 06/29/2024]
Abstract
In 1948, Dennis Gabor proposed the concept of holography, providing a pioneering solution to a quantitative description of the optical wavefront. After 75 years of development, holographic imaging has become a powerful tool for optical wavefront measurement and quantitative phase imaging. The emergence of this technology has given fresh energy to physics, biology, and materials science. Digital holography (DH) possesses the quantitative advantages of wide-field, non-contact, precise, and dynamic measurement capability for complex-waves. DH has unique capabilities for the propagation of optical fields by measuring light scattering with phase information. It offers quantitative visualization of the refractive index and thickness distribution of weak absorption samples, which plays a vital role in the pathophysiology of various diseases and the characterization of various materials. It provides a possibility to bridge the gap between the imaging and scattering disciplines. The propagation of wavefront is described by the complex amplitude. The complex-value in the complex-domain is reconstructed from the intensity-value measurement by camera in the real-domain. Here, we regard the process of holographic recording and reconstruction as a transformation between complex-domain and real-domain, and discuss the mathematics and physical principles of reconstruction. We review the DH in underlying principles, technical approaches, and the breadth of applications. We conclude with emerging challenges and opportunities based on combining holographic imaging with other methodologies that expand the scope and utility of holographic imaging even further. The multidisciplinary nature brings technology and application experts together in label-free cell biology, analytical chemistry, clinical sciences, wavefront sensing, and semiconductor production.
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Affiliation(s)
- Zhengzhong Huang
- Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
| | - Liangcai Cao
- Department of Precision Instrument, Tsinghua University, Beijing, 100084, China.
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2
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Jeon H, Jung M, Lee G, Hahn J. Aberration Estimation for Synthetic Aperture Digital Holographic Microscope Using Deep Neural Network. SENSORS (BASEL, SWITZERLAND) 2023; 23:9278. [PMID: 38005665 PMCID: PMC10674498 DOI: 10.3390/s23229278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/08/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
Digital holographic microscopy (DHM) is a valuable technique for investigating the optical properties of samples through the measurement of intensity and phase of diffracted beams. However, DHMs are constrained by Lagrange invariance, compromising the spatial bandwidth product (SBP) which relates resolution and field of view. Synthetic aperture DHM (SA-DHM) was introduced to overcome this limitation, but it faces significant challenges such as aberrations in synthesizing the optical information corresponding to the steering angle of incident wave. This paper proposes a novel approach utilizing deep neural networks (DNNs) for compensating aberrations in SA-DHM, extending the compensation scope beyond the numerical aperture (NA) of the objective lens. The method involves training a DNN from diffraction patterns and Zernike coefficients through a circular aperture, enabling effective aberration compensation in the illumination beam. This method makes it possible to estimate aberration coefficients from the only part of the diffracted beam cutoff by the circular aperture mask. With the proposed technique, the simulation results present improved resolution and quality of sample images. The integration of deep neural networks with SA-DHM holds promise for advancing microscopy capabilities and overcoming existing limitations.
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Affiliation(s)
| | | | | | - Joonku Hahn
- School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea; (H.J.); (M.J.); (G.L.)
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3
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Puyo L, Pfäffle C, Spahr H, Franke J, Bublitz D, Hillmann D, Hüttmann G. Diffuse-illumination holographic optical coherence tomography. OPTICS EXPRESS 2023; 31:33500-33517. [PMID: 37859131 DOI: 10.1364/oe.498654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 09/11/2023] [Indexed: 10/21/2023]
Abstract
Holographic optical coherence tomography (OCT) is a powerful imaging technique, but its ability to reveal low-reflectivity features is limited. In this study, we performed holographic OCT by incoherently averaging volumes with changing diffuse illumination of numerical aperture (NA) equal to the detection NA. While the reduction of speckle from singly scattered light is only modest, we discovered that speckle from multiply scattered light can be arbitrarily reduced, resulting in substantial improvements in image quality. This technique also offers the advantage of suppressing noises arising from spatial coherence, and can be implemented with a partially spatially incoherent light source for further mitigation of multiple scattering. Finally, we show that although holographic reconstruction capabilities are increasingly lost with decreasing spatial coherence, they can be retained over an axial range sufficient to standard OCT applications.
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Mandal AC, Rathor M, Zalevsky Z, Singh RK. Randomness assisted in-line holography with deep learning. Sci Rep 2023; 13:10986. [PMID: 37419990 DOI: 10.1038/s41598-023-37810-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 06/28/2023] [Indexed: 07/09/2023] Open
Abstract
We propose and demonstrate a holographic imaging scheme exploiting random illuminations for recording hologram and then applying numerical reconstruction and twin image removal. We use an in-line holographic geometry to record the hologram in terms of the second-order correlation and apply the numerical approach to reconstruct the recorded hologram. This strategy helps to reconstruct high-quality quantitative images in comparison to the conventional holography where the hologram is recorded in the intensity rather than the second-order intensity correlation. The twin image issue of the in-line holographic scheme is resolved by an unsupervised deep learning based method using an auto-encoder scheme. Proposed learning technique leverages the main characteristic of autoencoders to perform blind single-shot hologram reconstruction, and this does not require a dataset of samples with available ground truth for training and can reconstruct the hologram solely from the captured sample. Experimental results are presented for two objects, and a comparison of the reconstruction quality is given between the conventional inline holography and the one obtained with the proposed technique.
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Affiliation(s)
- Aditya Chandra Mandal
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India
- Department of Mining Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India
| | - Mohit Rathor
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India
| | - Zeev Zalevsky
- Faculty of Engineering and Nano Technology Center, Bar-Ilan University, Ramat Gan, Israel
| | - Rakesh Kumar Singh
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India.
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Tayal S, Tiwari S, Mehta DS. Label-free high-resolution white light quantitative phase nanoscopy system. JOURNAL OF BIOPHOTONICS 2023; 16:e202200298. [PMID: 36602467 DOI: 10.1002/jbio.202200298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/17/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
We present a high-resolution white light quantitative phase nanoscopy (WLQPN) system that can be utilized to visualize nanoparticles and subcellular features of the biological specimens. The five-phase shifting technique, along with deconvolution, is adopted to obtain super-resolution in phase imaging. The phase shifting technique can provide full detector resolution, making it beneficial as compared to the well-known Fourier analysis method. The Fourier transform method requires minimum angle of sin - 1 3 f x λ , where f x is maximum achievable spatial frequency. It limits the highest achievable resolution to much below the actual diffraction limit of the system. Thus, to obtain a high-resolution phase map of the biological specimen, a two-step process is adopted. First, the phase map is recovered using the five-phase shifting algorithm, with full detector spatial resolution. Second, the complex field is obtained from the recovered phase map and further processed using the Richardson Lucy total variation deconvolution algorithm to obtain super-resolution phase images. The present technique was tested on 1951 USAF resolution chart, 200 nm polystyrene beads and Escherichia coli bacteria using a 50×, 0.55NA objective lens. The 200 nm polystyrene beads are visually resolvable and subcellular features of the E. coli bacteria are also observed, suggesting a significant improvement in the resolution.
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Affiliation(s)
- Shilpa Tayal
- Bio-photonics and Green Photonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
| | - Shubham Tiwari
- Bio-photonics and Green Photonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
| | - Dalip Singh Mehta
- Bio-photonics and Green Photonics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
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6
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Ahmad A, Jayakumar N, Ahluwalia BS. Demystifying speckle field interference microscopy. Sci Rep 2022; 12:10869. [PMID: 35760816 PMCID: PMC9237063 DOI: 10.1038/s41598-022-14739-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 06/13/2022] [Indexed: 11/09/2022] Open
Abstract
Dynamic speckle illumination (DSI) has recently attracted strong attention in the field of biomedical imaging as it pushes the limits of interference microscopy (IM) in terms of phase sensitivity, and spatial and temporal resolution compared to conventional light source illumination. To date, despite conspicuous advantages, it has not been extensively implemented in the field of phase imaging due to inadequate understanding of interference fringe formation, which is challenging to obtain in dynamic speckle illumination interference microscopy (DSI-IM). The present article provides the basic understanding of DSI through both simulation and experiments that is essential to build interference microscopy systems such as quantitative phase microscopy, digital holographic microscopy and optical coherence tomography. Using the developed understanding of DSI, we demonstrated its capabilities which enables the use of non-identical objective lenses in both arms of the interferometer and opens the flexibility to use user-defined microscope objective lens for scalable field of view and resolution phase imaging. It is contrary to the present understanding which forces us to use identical objective lenses in conventional IM system and limits the applicability of the system for fixed objective lens. In addition, it is also demonstrated that the interference fringes are not washed out over a large range of optical path difference (OPD) between the object and the reference arm providing competitive edge over low temporal coherence light source based IM system. The theory and explanation developed here would enable wider penetration of DSI-IM for applications in biology and material sciences.
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Affiliation(s)
- Azeem Ahmad
- Department of Physics and Technology, UiT The Arctic University of Norway, 9037, Tromsø, Norway.
| | - Nikhil Jayakumar
- Department of Physics and Technology, UiT The Arctic University of Norway, 9037, Tromsø, Norway
| | - Balpreet Singh Ahluwalia
- Department of Physics and Technology, UiT The Arctic University of Norway, 9037, Tromsø, Norway. .,Department of Clinical Science, Intervention and Technology Karolinska Institute, and Center for Fetal Medicine, Karolinska University Hospital, 17177, Stockholm, Sweden.
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7
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Mandal AC, Sarkar T, Zalevsky Z, Singh RK. Structured transmittance illumination coherence holography. Sci Rep 2022; 12:4564. [PMID: 35296757 PMCID: PMC8927146 DOI: 10.1038/s41598-022-08603-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 01/20/2022] [Indexed: 11/25/2022] Open
Abstract
The coherence holography offers an unconventional way to reconstruct the hologram where an incoherent light illumination is used for reconstruction purposes, and object encoded into the hologram is reconstructed as the distribution of the complex coherence function. Measurement of the coherence function usually requires an interferometric setup and array detectors. This paper presents an entirely new idea of reconstruction of the complex coherence function in the coherence holography without an interferometric setup. This is realized by structured pattern projections on the incoherent source structure and implementing measurement of the cross-covariance of the intensities by a single-pixel detector. This technique, named structured transmittance illumination coherence holography (STICH), helps to reconstruct the complex coherence from the intensity measurement in a single-pixel detector without an interferometric setup and also keeps advantages of the intensity correlations. A simple experimental setup is presented as a first step to realize the technique, and results based on the computer modeling of the experimental setup are presented to show validation of the idea.
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Affiliation(s)
- Aditya Chandra Mandal
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India.,Department of Mining Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India
| | - Tushar Sarkar
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India
| | - Zeev Zalevsky
- Faculty of Engineering and Nano Technology Center, Bar-Ilan University, Ramat-Gan, Israel
| | - Rakesh Kumar Singh
- Laboratory of Information Photonics and Optical Metrology, Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, 221005, India.
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8
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Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System. PHOTONICS 2021. [DOI: 10.3390/photonics8070276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The coherent noise always exists in digital holographic microscopy due to the laser source, degrading the image quality. A method of speckle suppression using the dynamic speckle illumination, produced by double-moving diffusers, is presented in digital holographic microscopy. The space–time correlation functions are theoretically analyzed from the statistics distribution in the doubly and singly scattered system, respectively. The configuration of double-moving diffusers is demonstrated to have better performance in speckle suppression compared with the single diffuser and moving-static double diffusers cases. The experiment results verify the feasibility of the approach. The presented approach only requires a single shot interferogram to realize the speckle reduction, accordingly it has the potential application in real-time measurement.
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9
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Physical pupil manipulation for speckle reduction in digital holographic microscopy. Heliyon 2021; 7:e06098. [PMID: 33553757 PMCID: PMC7851349 DOI: 10.1016/j.heliyon.2021.e06098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/07/2020] [Accepted: 01/22/2021] [Indexed: 12/03/2022] Open
Abstract
The reduction of speckle noise by physically changing the pupil of the imaging system, as first envisioned in optical holography, is experimentally applied to a digital holographic microscope (DHM). The imaging pupil of a DHM, operating in image plane telecentric-afocal architecture, is changed in a controlled way between successive recordings, allowing the shooting of multiple partially-decorrelated holograms. Averaging the numerically reconstructed holograms yields amplitude and/or phase images with reduced speckle noise. Experimental results of biological specimens and a phase-only resolution test show the feasibility to recover micron-sized features in images with reduced speckle noise.
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10
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Bazow B, Phan T, Nguyen T, Raub C, Nehmetallah G. Simulation of digital holographic recording and reconstruction using a generalized matrix method. APPLIED OPTICS 2021; 60:A21-A37. [PMID: 33690351 DOI: 10.1364/ao.404405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 09/15/2020] [Indexed: 05/22/2023]
Abstract
In recent years, research efforts in the field of digital holography have expanded significantly, due to the ability to obtain high-resolution intensity and phase images. The information contained in these images have become of great interest to the machine learning community, with applications spanning a wide portfolio of research areas, including bioengineering. In this work, we seek to demonstrate a high-fidelity simulation of holographic recording. By accurately and numerically simulating the propagation of a coherent light source through a series of optical elements and the object itself, we accurately predict the optical interference of the object and reference wave at the recording plane, including diffraction effects, aberrations, and speckle. We show that the optical transformation that predicts the complex field at the recording plane can be generalized for arbitrary holographic recording configurations using a matrix method. In addition, we provide a detailed description of digital phase reconstruction and aberration compensation for a variety of off-axis holographic configurations. Reconstruction errors are presented for the various holographic recording geometries and complex field objects. While the primary objective of this work is not to evaluate phase reconstruction approaches, the reconstruction of simulated holograms provides validation of the generalized simulation method. The long-term goal of this work is that the generalized holographic simulation motivates the use of phase reconstruction of the simulated holograms to populate databases for training machine-learning algorithms aimed at classifying relevant objects recorded through a variety of holographic setups.
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11
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Park C, Lee K, Baek Y, Park Y. Low-coherence optical diffraction tomography using a ferroelectric liquid crystal spatial light modulator. OPTICS EXPRESS 2020; 28:39649-39659. [PMID: 33379510 DOI: 10.1364/oe.405418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/12/2020] [Indexed: 06/12/2023]
Abstract
Optical diffraction tomography (ODT) is a three-dimensional (3D) label-free imaging technique. The 3D refractive index distribution of a sample can be reconstructed from multiple two-dimensional optical field images via ODT. Herein, we introduce a temporally low-coherence ODT technique using a ferroelectric liquid crystal spatial light modulator (FLC SLM). The fast binary-phase modulation provided by the FLC SLM ensures the high spatiotemporal resolution. To reduce coherent noise, a superluminescent light-emitting diode is used as an economic low-coherence light source. We demonstrate the performance of the proposed system using various samples, including colloidal microspheres and live epithelial cells.
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12
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Chang T, Ryu D, Jo Y, Choi G, Min HS, Park Y. Calibration-free quantitative phase imaging using data-driven aberration modeling. OPTICS EXPRESS 2020; 28:34835-34847. [PMID: 33182943 DOI: 10.1364/oe.412009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
We present a data-driven approach to compensate for optical aberrations in calibration-free quantitative phase imaging (QPI). Unlike existing methods that require additional measurements or a background region to correct aberrations, we exploit deep learning techniques to model the physics of aberration in an imaging system. We demonstrate the generation of a single-shot aberration-corrected field image by using a U-net-based deep neural network that learns a translation between an optical field with aberrations and an aberration-corrected field. The high fidelity and stability of our method is demonstrated on 2D and 3D QPI measurements of various confluent eukaryotic cells and microbeads, benchmarking against the conventional method using background subtractions.
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Fonseca E, Fiadeiro PT, Bernardo MV, Pinheiro A, Pereira M. Assessment of speckle denoising filters for digital holography using subjective and objective evaluation models. APPLIED OPTICS 2019; 58:G282-G292. [PMID: 31873511 DOI: 10.1364/ao.58.00g282] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
Digital holography is an emerging imaging technique for displaying and sensing three-dimensional objects. The perceived image quality of a hologram is frequently corrupted by speckle noise due to coherent illumination. Although several speckle noise reduction methods have been developed so far, there are scarce quality assessment studies to address their performance, and they typically focus solely on objective metrics. However, these metrics do not reflect the visual quality perceived by a human observer. In this work, the performances of four speckle reduction algorithms, namely, the nonlocal means-the Lee, the Frost, and the block-matching 3D filters, with varying parameterizations-were subjectively evaluated. The results were ranked with respect to the perceived image quality to obtain the mean opinion scores using pairwise comparison. The correlation between the subjective results and 20 different no-reference objective quality metrics was evaluated. The experiment indicates that block-matching 3D and Lee are the preferred filters, depending on hologram characteristics. The best-performing objective metrics were identified for each filter.
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Vinu RV, Chen Z, Pu J, Otani Y, Singh RK. Speckle-field digital polarization holographic microscopy. OPTICS LETTERS 2019; 44:5711-5714. [PMID: 31774760 DOI: 10.1364/ol.44.005711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
We present a new polarization holographic microscopy technique based on speckle-field illumination with enhanced spatial resolution and controlled coherent noise reduction. The proposed technique employs a spatial light modulator for the generation of a sequential speckle pattern for the illumination of the sample. The developed microscope is capable of simultaneous extraction of orthogonal polarization components of the field emanating from the sample. We demonstrate the potential features of the technique by presenting spatially resolved images of the known samples and the inhomogeneous anisotropic samples. The technique has substantial significance in biomedical imaging with digital auto-focusing and complex field imaging.
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15
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Agnero MA, Konan K, Tokou ZGCS, Kossonou YTA, Dion BS, Kaduki KA, Zoueu JT. Malaria-Infected Red Blood Cell Analysis through Optical and Biochemical Parameters Using the Transport of Intensity Equation and the Microscope's Optical Properties. SENSORS (BASEL, SWITZERLAND) 2019; 19:E3045. [PMID: 31295927 PMCID: PMC6678084 DOI: 10.3390/s19143045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/07/2019] [Accepted: 06/09/2019] [Indexed: 11/16/2022]
Abstract
The accuracy, reliability, speed and cost of the methods used for malaria diagnosis are key to the diseases' treatment and eventual eradication. However, improvement in any one of these requirements can lead to deterioration of the rest due to their interdependence. We propose an optical method that provides fast detection of malaria-infected red blood cells (RBCs) at a lower cost. The method is based on the combination of deconvolution, topography and three-dimensional (3D) refractive index reconstruction of the malaria-infected RBCs by use of the transport of intensity equation. Using our method, healthy RBCs were identified by their biconcave shape, quasi-uniform spatial distribution of their refractive indices and quasi-uniform concentration of hemoglobin. The values of these optical and biochemical parameters were found to be in agreement with the values reported in the literature. Results for the malaria-infected RBCs were significantly different from those of the healthy RBCs. The topography of the cells and their optical and biochemical parameters enabled identification of their stages of infection. This work introduces a significant method of analyzing malaria-infected RBCs at a lower cost and without the use of fluorescent labels for the parasites.
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Affiliation(s)
- Marcel Akpa Agnero
- Laboratoire de Physique de la Matière Condensée et Technologie, UFR SSMT, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d'Ivoire.
| | - Kouakou Konan
- Laboratoire d'Instrumentation d'Image et Spectroscopie, Institut National Polytechnique Félix Houphouët-Boigny (INPH-B), BP 1093 Yamoussoukro, Côte d'Ivoire
| | | | - Yao Taky Alvarez Kossonou
- Laboratoire d'Instrumentation d'Image et Spectroscopie, Institut National Polytechnique Félix Houphouët-Boigny (INPH-B), BP 1093 Yamoussoukro, Côte d'Ivoire
| | - Bienvenue Sylvère Dion
- Laboratoire d'Instrumentation d'Image et Spectroscopie, Institut National Polytechnique Félix Houphouët-Boigny (INPH-B), BP 1093 Yamoussoukro, Côte d'Ivoire
| | | | - Jérémie Thouakesséh Zoueu
- Laboratoire d'Instrumentation d'Image et Spectroscopie, Institut National Polytechnique Félix Houphouët-Boigny (INPH-B), BP 1093 Yamoussoukro, Côte d'Ivoire
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16
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LEE KYEOREH, SHIN SEUNGWOO, YAQOOB ZAHID, SO PETERTC, PARK YONGKEUN. Low-coherent optical diffraction tomography by angle-scanning illumination. JOURNAL OF BIOPHOTONICS 2019; 12:e201800289. [PMID: 30597743 PMCID: PMC6470054 DOI: 10.1002/jbio.201800289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 11/27/2018] [Accepted: 12/28/2018] [Indexed: 05/20/2023]
Abstract
Temporally low-coherent optical diffraction tomography (ODT) is proposed and demonstrated based on angle-scanning Mach-Zehnder interferometry. Using a digital micromirror device based on diffractive tilting, the full-field interference of incoherent light is successfully maintained during every angle-scanning sequences. Further, current ODT reconstruction principles for temporally incoherent illuminations are thoroughly reviewed and developed. Several limitations of incoherent illumination are also discussed, such as the nondispersive assumption, optical sectioning capacity and illumination angle limitation. Using the proposed setup and reconstruction algorithms, low-coherent ODT imaging of plastic microspheres, human red blood cells and rat pheochromocytoma cells is experimentally demonstrated.
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Affiliation(s)
- KYEOREH LEE
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KAIST Institute for Health Science and Technology, Daejeon 34141, Republic of Korea
| | - SEUNGWOO SHIN
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KAIST Institute for Health Science and Technology, Daejeon 34141, Republic of Korea
| | - ZAHID YAQOOB
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA
| | - PETER T. C. SO
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA
- Department of Mechanical Engineering, MIT, Cambridge, Massachusetts 02139, USA
- Department of Biological Engineering, MIT, Cambridge, Massachusetts 02139, USA
| | - YONGKEUN PARK
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KAIST Institute for Health Science and Technology, Daejeon 34141, Republic of Korea
- Tomocube Inc., Daejeon 34051, Republic of Korea
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Zhang H, Jiang S, Liao J, Deng J, Liu J, Zhang Y, Zheng G. Near-field Fourier ptychography: super-resolution phase retrieval via speckle illumination. OPTICS EXPRESS 2019; 27:7498-7512. [PMID: 30876313 PMCID: PMC6825623 DOI: 10.1364/oe.27.007498] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/08/2019] [Accepted: 02/09/2019] [Indexed: 05/21/2023]
Abstract
High spatial resolution is the goal of many imaging systems. While designing a high-resolution lens with diffraction-limited performance over a large field of view remains a difficult task, creating a complex speckle pattern with wavelength-limited spatial features is easily accomplished with a simple random diffuser. With this observation and the concept of near-field ptychography, we report a new imaging modality, termed near-field Fourier ptychography, to address high-resolution imaging challenges in both microscopic and macroscopic imaging settings. 'Near-field' refers to placing the object at a short defocus distance with a large Fresnel number. We project a speckle pattern with fine spatial features on the object instead of directly resolving the spatial features via a high-resolution lens. We then translate the object (or speckle) to different positions and acquire the corresponding images by using a low-resolution lens. A ptychographic phase retrieval process is used to recover the complex object, the unknown speckle pattern, and the coherent transfer function at the same time. In a microscopic imaging setup, we use a 0.12 numerical aperture (NA) lens to achieve an NA of 0.85 in the reconstruction process. In a macroscale photographic imaging setup, we achieve ~7-fold resolution gain by using a photographic lens. The collection optics do not determine the final achievable resolution; rather, the speckle pattern's feature size does. This is similar to our recent demonstration in fluorescence imaging settings (Guo et al., Biomed. Opt. Express, 9(1), 2018). The reported imaging modality can be employed in light, coherent X-ray, and transmission electron imaging systems to increase resolution and provide quantitative absorption and object phase contrast.
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Affiliation(s)
- He Zhang
- Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Ultra-Precision Optoelectronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150001, China
- These authors contributed equally to this work
| | - Shaowei Jiang
- Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- These authors contributed equally to this work
| | - Jun Liao
- Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Junjing Deng
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jian Liu
- Ultra-Precision Optoelectronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150001, China
| | - Yongbing Zhang
- Shenzhen Key Lab of Broadband Network and Multimedia, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Guoan Zheng
- Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Electrical and Computer Engineering, University of Connecticut, Storrs, CT 06269, USA
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18
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Choi G, Ryu D, Jo Y, Kim YS, Park W, Min HS, Park Y. Cycle-consistent deep learning approach to coherent noise reduction in optical diffraction tomography. OPTICS EXPRESS 2019; 27:4927-4943. [PMID: 30876102 DOI: 10.1364/oe.27.004927] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We present a deep neural network to reduce coherent noise in three-dimensional quantitative phase imaging. Inspired by the cycle generative adversarial network, the denoising network was trained to learn a transform between two image domains: clean and noisy refractive index tomograms. The unique feature of this network, distinct from previous machine learning approaches employed in the optical imaging problem, is that it uses unpaired images. The learned network quantitatively demonstrated its performance and generalization capability through denoising experiments of various samples. We concluded by applying our technique to reduce the temporally changing noise emerging from focal drift in time-lapse imaging of biological cells. This reduction cannot be performed using other optical methods for denoising.
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19
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Zhang P, Manna SK, Miller EB, Jian Y, Meleppat RK, Sarunic MV, Pugh EN, Zawadzki RJ. Aperture phase modulation with adaptive optics: a novel approach for speckle reduction and structure extraction in optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2019; 10:552-570. [PMID: 30800499 PMCID: PMC6377907 DOI: 10.1364/boe.10.000552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/19/2018] [Accepted: 12/19/2018] [Indexed: 05/03/2023]
Abstract
Speckle is an inevitable consequence of the use of coherent light in imaging and acts as noise that corrupts image formation in most applications. Optical coherence tomographic imaging, as a technique employing coherence time gating, suffers from speckle. We present here a novel method of suppressing speckle noise intrinsically compatible with adaptive optics (AO) for confocal coherent imaging: modulation of the phase in the system pupil aperture with a segmented deformable mirror (DM) to introduce minor perturbations in the point spread function. This approach creates uncorrelated speckle patterns in a series of images, enabling averaging to suppress speckle noise while maintaining structural detail. A method is presented that efficiently determines the optimal range of modulation of DM segments relative to their AO-optimized position so that speckle noise is reduced while image resolution and signal strength are preserved. The method is active and independent of sample properties. Its effectiveness and efficiency are quantified and demonstrated by both ex vivo non-biological and in vivo biological applications.
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Affiliation(s)
- Pengfei Zhang
- UC Davis Eye-Pod Small Animal Ocular Imaging Laboratory, Department of Cell Biology and Human Anatomy, University of California Davis, 4320 Tupper Hall, Davis, CA 95616, USA
| | - Suman K Manna
- UC Davis Eye-Pod Small Animal Ocular Imaging Laboratory, Department of Cell Biology and Human Anatomy, University of California Davis, 4320 Tupper Hall, Davis, CA 95616, USA
| | - Eric B Miller
- Center for Neuroscience, 1544 Newton Court, University of California Davis, Davis, CA 95618, USA
| | - Yifan Jian
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Ratheesh K Meleppat
- UC Davis Eye-Pod Small Animal Ocular Imaging Laboratory, Department of Cell Biology and Human Anatomy, University of California Davis, 4320 Tupper Hall, Davis, CA 95616, USA
| | - Marinko V Sarunic
- Simon Fraser University, School of Engineering Science, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Edward N Pugh
- UC Davis Eye-Pod Small Animal Ocular Imaging Laboratory, Department of Cell Biology and Human Anatomy, University of California Davis, 4320 Tupper Hall, Davis, CA 95616, USA
- UC Davis Eye Center, Dept. of Ophthalmology & Vision Science, University of California Davis, 4860 Y Street, Suite 2400, Sacramento, CA 95817, USA
| | - Robert J Zawadzki
- UC Davis Eye-Pod Small Animal Ocular Imaging Laboratory, Department of Cell Biology and Human Anatomy, University of California Davis, 4320 Tupper Hall, Davis, CA 95616, USA
- UC Davis Eye Center, Dept. of Ophthalmology & Vision Science, University of California Davis, 4860 Y Street, Suite 2400, Sacramento, CA 95817, USA
- Vision Science and Advanced Retinal Imaging Laboratory, Dept. of Ophthalmology & Vision Science, University of California Davis, 4860 Y Street, Suite 2400, Sacramento, CA 95817, USA
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20
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Recent Progress on Aberration Compensation and Coherent Noise Suppression in Digital Holography. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8030444] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Choi I, Lee K, Park Y. Compensation of aberration in quantitative phase imaging using lateral shifting and spiral phase integration. OPTICS EXPRESS 2017; 25:30771-30779. [PMID: 29221103 DOI: 10.1364/oe.25.030771] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/09/2017] [Indexed: 06/07/2023]
Abstract
We present a simple and effective method to eliminate system aberrations in quantitative phase imaging. Using spiral phase integration, complete information about system aberration is calculated from three laterally shifted phase images. The present method is especially useful when measuring confluent samples in which acquisition of background area is challenging. To demonstrate validity and applicability, we present measurements of various types of samples including microspheres, HeLa cells, and mouse brain tissue. Working conditions and limitations are systematically analyzed and discussed.
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22
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Zheng J, Gao P, Shao X, Nienhaus GU. Refractive index measurement of suspended cells using opposed-view digital holographic microscopy. APPLIED OPTICS 2017; 56:9000-9005. [PMID: 29131185 DOI: 10.1364/ao.56.009000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 10/13/2017] [Indexed: 06/07/2023]
Abstract
Opposed-view digital holographic microscopy (OV-DHM) with autofocusing and out-of-focus background suppression was demonstrated and applied to measure the refractive index (RI) of suspended HeLa cells. In OV-DHM, a specimen is illuminated from two sides in a 4π-like configuration. The generated two opposite-view object waves, which have orthogonal polarization orientations, interfere with a common reference wave, and the generated holograms are recorded by a CMOS camera. The image plane of the sample was determined by finding the minimal variation between the two object waves. The out-of-focus background was suppressed by averaging the two object waves. Simultaneous determination of both the cell thickness and the phase retardation was avoided by using a spheroidal model for the detached cell obtained from confocal microscopy. Thus, the RI of suspended HeLa cells was measured from phase images of OV-DHM, with the thickness of the cells estimated by using a constant axial-to-lateral ratio. This measurement strategy reveals the RI with an accuracy of ∼10% of the RI difference between cells and surrounding medium.
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23
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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: 3.6] [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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24
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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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25
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Finkeldey M, Göring L, Brenner C, Hofmann M, Gerhardt NC. Depth-filtering in common-path digital holographic microscopy. OPTICS EXPRESS 2017; 25:19398-19407. [PMID: 29041134 DOI: 10.1364/oe.25.019398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate a method to select different layers in a sample using a low coherent gating approach combined with a stable common-path quantitative phase imaging microscopy setup. The depth-filtering technique allows us to suppress the negative effects generated by multiple interference patterns of overlaying optical interfaces in the sample. It maintains the compact and stable common-path setup, while enabling images with a high phase sensitivity and acquisition speed. We use a holographic microscope in reflective geometry with a non-tunable low coherence light source. First results of this technique are shown by imaging the hardware layer of a standard micro-controller through its thinned substrate.
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26
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Removal of back-reflection noise at ultrathin imaging probes by the single-core illumination and wide-field detection. Sci Rep 2017; 7:6524. [PMID: 28747650 PMCID: PMC5529376 DOI: 10.1038/s41598-017-07024-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/20/2017] [Indexed: 01/10/2023] Open
Abstract
Thin waveguides such as graded-index lenses and fiber bundles are often used as imaging probes for high-resolution endomicroscopes. However, strong back-reflection from the end surfaces of the probes makes it difficult for them to resolve weak contrast objects, especially in the reflectance-mode imaging. Here we propose a method to spatially isolate illumination pathways from detection channels, and demonstrate wide-field reflectance imaging free from back-reflection noise. In the image fiber bundle, we send illumination light through individual core fibers and detect signals from target objects through the other fibers. The transmission matrix of the fiber bundle is measured and used to reconstruct a pixelation-free image. We demonstrated that the proposed imaging method improved 3.2 times on the signal to noise ratio produced by the conventional illumination-detection scheme.
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27
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Liba O, Lew MD, SoRelle ED, Dutta R, Sen D, Moshfeghi DM, Chu S, de la Zerda A. Speckle-modulating optical coherence tomography in living mice and humans. Nat Commun 2017. [PMID: 28632205 PMCID: PMC5481831 DOI: 10.1038/ncomms15845] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Optical coherence tomography (OCT) is a powerful biomedical imaging technology that relies on the coherent detection of backscattered light to image tissue morphology in vivo. As a consequence, OCT is susceptible to coherent noise (speckle noise), which imposes significant limitations on its diagnostic capabilities. Here we show speckle-modulating OCT (SM-OCT), a method based purely on light manipulation that virtually eliminates speckle noise originating from a sample. SM-OCT accomplishes this by creating and averaging an unlimited number of scans with uncorrelated speckle patterns without compromising spatial resolution. Using SM-OCT, we reveal small structures in the tissues of living animals, such as the inner stromal structure of a live mouse cornea, the fine structures inside the mouse pinna, and sweat ducts and Meissner’s corpuscle in the human fingertip skin—features that are otherwise obscured by speckle noise when using conventional OCT or OCT with current state of the art speckle reduction methods. Optical coherence tomography, a technique that can image inside tissue, is susceptible to speckle noise that limits its diagnostic potential. Here, Liba et al. show that speckle noise can be removed without effectively compromising resolution, revealing previously hidden small structures within tissue.
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Affiliation(s)
- Orly Liba
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA.,Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA.,Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,The Bio-X Program, Stanford, California 94305, USA
| | - Matthew D Lew
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA
| | - Elliott D SoRelle
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA.,Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,The Bio-X Program, Stanford, California 94305, USA.,Biophysics Program at Stanford, Stanford, California 94305, USA
| | - Rebecca Dutta
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA.,Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,The Bio-X Program, Stanford, California 94305, USA
| | - Debasish Sen
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA.,Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,The Bio-X Program, Stanford, California 94305, USA
| | - Darius M Moshfeghi
- Department of Ophthalmology, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California 94303, USA
| | - Steven Chu
- The Bio-X Program, Stanford, California 94305, USA.,Biophysics Program at Stanford, Stanford, California 94305, USA.,Departments of Physics and Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, USA
| | - Adam de la Zerda
- Department of Structural Biology, Stanford University, Stanford, California 94305, USA.,Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA.,Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,The Bio-X Program, Stanford, California 94305, USA.,Biophysics Program at Stanford, Stanford, California 94305, USA.,The Chan Zuckerberg Biohub, San Francisco, California 94158, USA
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28
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Farrokhi H, Boonruangkan J, Chun BJ, Rohith TM, Mishra A, Toh HT, Yoon HS, Kim YJ. Speckle reduction in quantitative phase imaging by generating spatially incoherent laser field at electroactive optical diffusers. OPTICS EXPRESS 2017; 25:10791-10800. [PMID: 28788768 DOI: 10.1364/oe.25.010791] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We studied quantitative phase imaging (QPI) using coherent laser illumination coupled with static and moving optical diffusers. The spatial coherence of a continuous-wave laser was controlled by tuning the particle size and the diffusion angle of optical diffusers for speckle-reduced 3D phase imaging of transparent objects. We used a common-path QPI configuration to investigate the coherent phase mapping of polystyrene micro-beads and breast cancer cells (MCF-7) under different degrees of coherent speckles. The proposed speckle reduction method could provide an avenue for enhancing lateral resolution and suppressing coherent artifacts of the phase images from QPI.
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29
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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: 0.9] [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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30
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Universal sensitivity of speckle intensity correlations to wavefront change in light diffusers. Sci Rep 2017; 7:44435. [PMID: 28322268 PMCID: PMC5359546 DOI: 10.1038/srep44435] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 02/07/2017] [Indexed: 11/08/2022] Open
Abstract
Here, we present a concept based on the realization that a complex medium can be used as a simple interferometer. Changes in the wavefront of an incident coherent beam can be retrieved by analyzing changes in speckle patterns when the beam passes through a light diffuser. We demonstrate that the spatial intensity correlations of the speckle patterns are independent of the light diffusers, and are solely determined by the phase changes of an incident beam. With numerical simulations using the random matrix theory, and an experimental pressure-driven wavefront-deforming setup using a microfluidic channel, we theoretically and experimentally confirm the universal sensitivity of speckle intensity correlations, which is attributed to the conservation of optical field correlation despite multiple light scattering. This work demonstrates that a light diffuser works as a simple interferometer, and presents opportunities to retrieve phase information of optical fields with a compact scattering layer in various applications in metrology, analytical chemistry, and biomedicine.
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31
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Sencan I, Huang BK, Bian Y, Mis E, Khokha MK, Cao H, Choma M. Ultrahigh-speed, phase-sensitive full-field interferometric confocal microscopy for quantitative microscale physiology. BIOMEDICAL OPTICS EXPRESS 2016; 7:4674-4684. [PMID: 27896006 PMCID: PMC5119606 DOI: 10.1364/boe.7.004674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 10/17/2016] [Accepted: 10/17/2016] [Indexed: 05/05/2023]
Abstract
We developed ultra-high-speed, phase-sensitive, full-field reflection interferometric confocal microscopy (FFICM) for the quantitative characterization of in vivo microscale biological motions and flows. We demonstrated 2D frame rates in excess of 1 kHz and pixel throughput rates up to 125 MHz. These fast FFICM frame rates were enabled by the use of a low spatial coherence, high-power laser source. Specifically, we used a dense vertical cavity surface emitting laser (VCSEL) array that synthesized low spatial coherence light through a large number of narrowband, mutually-incoherent emitters. Off-axis interferometry enabled single-shot acquisition of the complex-valued interferometric signal. We characterized the system performance (~2 μm lateral resolution, ~8 μm axial gating depth) with a well-known target. We also demonstrated the use of this highly parallelized confocal microscopy platform for visualization and quantification of cilia-driven surface flows and cilia beat frequency in an important animal model (Xenopus embryos) with >1 kHz frame rate. Such frame rates are needed to see large changes in local flow velocity over small distance (high shear flow), in this case, local flow around a single ciliated cell. More generally, our results are an important demonstration of low-spatial coherence, high-power lasers in high-performance, quantitative biomedical imaging.
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Affiliation(s)
- Ikbal Sencan
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT 06511, USA; Current affiliation: MGH/HST Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA;
| | - Brendan K Huang
- Biomedical Engineering, Yale University, New Haven, CT 06511, USA
| | - Yong Bian
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT 06511, USA; Current affiliation: Department of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary 243 Charles Street, Boston, MA 02114, USA
| | - Emily Mis
- Pediatrics, Yale University, New Haven, CT 06511, USA
| | | | - Hui Cao
- Applied Physics, Yale University, New Haven, CT 06511, USA
| | - Michael Choma
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT 06511, USA; Biomedical Engineering, Yale University, New Haven, CT 06511, USA; Pediatrics, Yale University, New Haven, CT 06511, USA; Applied Physics, Yale University, New Haven, CT 06511, USA;
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32
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Memory-effect based deconvolution microscopy for super-resolution imaging through scattering media. Sci Rep 2016; 6:33558. [PMID: 27633483 PMCID: PMC5025711 DOI: 10.1038/srep33558] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/30/2016] [Indexed: 11/08/2022] Open
Abstract
High-resolution imaging through turbid media is a fundamental challenge of optical sciences that has attracted a lot of attention in recent years for its wide range of potential applications. Here, we demonstrate that the resolution of imaging systems looking behind a highly scattering medium can be improved below the diffraction-limit. To achieve this, we demonstrate a novel microscopy technique enabled by the optical memory effect that uses a deconvolution image processing and thus it does not require iterative focusing, scanning or phase retrieval procedures. We show that this newly established ability of direct imaging through turbid media provides fundamental and practical advantages such as three-dimensional refocusing and unambiguous object reconstruction.
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33
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Ahmad A, Dubey V, Singh G, Singh V, Mehta DS. Quantitative phase imaging of biological cells using spatially low and temporally high coherent light source. OPTICS LETTERS 2016; 41:1554-7. [PMID: 27192285 DOI: 10.1364/ol.41.001554] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this Letter, we demonstrate quantitative phase imaging of biological samples, such as human red blood cells (RBCs) and onion cells using narrow temporal frequency and wide angular frequency spectrum light source. This type of light source was synthesized by the combined effect of spatial, angular, and temporal diversity of speckle reduction technique. The importance of using low spatial and high temporal coherence light source over the broad band and narrow band light source is that it does not require any dispersion compensation mechanism for biological samples. Further, it avoids the formation of speckle or spurious fringes which arises while using narrow band light source.
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34
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Kim K, Yoon J, Park Y. Large-scale optical diffraction tomography for inspection of optical plastic lenses. OPTICS LETTERS 2016; 41:934-7. [PMID: 26974084 DOI: 10.1364/ol.41.000934] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Herein is presented an optical diffraction tomography (ODT) technique for measuring 3-D refractive index (RI) maps of optical plastic lenses. A Mach-Zehnder interferometer was used to measure multiple complex optical fields of a plastic lens immersed in RI-matching oil at various rotational orientations. From this, ODT was used to reconstruct a 3-D RI distribution of the plastic lens with unprecedented RI sensitivity (Δn=4.21×10(-5) and high resolution (12.8 μm). As a demonstration, 3-D RI distributions of a 2 mm-diameter borosilicate sphere and a 5 mm-diameter plastic lens were reconstructed. Defects in the lens, generated by pulsed laser ablation, were also detected using the present method.
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Thornton KL, Findlay RC, Walrad PB, Wilson LG. Investigating the Swimming of Microbial Pathogens Using Digital Holography. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 915:17-32. [PMID: 27193535 DOI: 10.1007/978-3-319-32189-9_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
To understand much of the behaviour of microbial pathogens, it is necessary to image living cells, their interactions with each other and with host cells. Species such as Escherichia coli are difficult subjects to image: they are typically microscopic, colourless and transparent. Traditional cell visualisation techniques such as fluorescent tagging or phase-contrast microscopy give excellent information on cell behaviour in two dimensions, but no information about cells moving in three dimensions. We review the use of digital holographic microscopy for three-dimensional imaging at high speeds, and demonstrate its use for capturing the shape and swimming behaviour of three important model pathogens: E. coli, Plasmodium spp. and Leishmania spp.
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Affiliation(s)
- K L Thornton
- Department of Physics, University of York, Heslington, York, YO10 5DD, England
| | - R C Findlay
- Department of Physics, University of York, Heslington, York, YO10 5DD, England.,Centre for Immunology and Infection, Department of Biology, University of York, Heslington, York, YO10 5DD, England
| | - P B Walrad
- Centre for Immunology and Infection, Department of Biology, University of York, Heslington, York, YO10 5DD, England
| | - L G Wilson
- Department of Physics, University of York, Heslington, York, YO10 5DD, England.
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36
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Shin S, Kim K, Yoon J, Park Y. Active illumination using a digital micromirror device for quantitative phase imaging. OPTICS LETTERS 2015; 40:5407-10. [PMID: 26565886 DOI: 10.1364/ol.40.005407] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We present a powerful and cost-effective method for active illumination using a digital micromirror device (DMD) for quantitative phase-imaging techniques. Displaying binary illumination patterns on a DMD with appropriate spatial filtering, plane waves with various illumination angles are generated and impinged onto a sample. Complex optical fields of the sample obtained with various incident angles are then measured via Mach-Zehnder interferometry, from which a high-resolution 2D synthetic aperture phase image and a 3D refractive index tomogram of the sample are reconstructed. We demonstrate the fast and stable illumination-control capability of the proposed method by imaging colloidal spheres and biological cells. The capability of high-speed optical diffraction tomography is also demonstrated by measuring 3D Brownian motion of colloidal particles with the tomogram acquisition rate of 100 Hz.
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Lim J, Lee K, Jin KH, Shin S, Lee S, Park Y, Ye JC. Comparative study of iterative reconstruction algorithms for missing cone problems in optical diffraction tomography. OPTICS EXPRESS 2015; 23:16933-48. [PMID: 26191704 DOI: 10.1364/oe.23.016933] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In optical tomography, there exist certain spatial frequency components that cannot be measured due to the limited projection angles imposed by the numerical aperture of objective lenses. This limitation, often called as the missing cone problem, causes the under-estimation of refractive index (RI) values in tomograms and results in severe elongations of RI distributions along the optical axis. To address this missing cone problem, several iterative reconstruction algorithms have been introduced exploiting prior knowledge such as positivity in RI differences or edges of samples. In this paper, various existing iterative reconstruction algorithms are systematically compared for mitigating the missing cone problem in optical diffraction tomography. In particular, three representative regularization schemes, edge preserving, total variation regularization, and the Gerchberg-Papoulis algorithm, were numerically and experimentally evaluated using spherical beads as well as real biological samples; human red blood cells and hepatocyte cells. Our work will provide important guidelines for choosing the appropriate regularization in ODT.
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Kim M, Choi W, Choi Y, Yoon C, Choi W. Transmission matrix of a scattering medium and its applications in biophotonics. OPTICS EXPRESS 2015; 23:12648-68. [PMID: 26074520 DOI: 10.1364/oe.23.012648] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A conventional lens has well-defined transfer function with which we can form an image of a target object. On the contrary, scattering media such as biological tissues, multimode optical fibers and layers of disordered nanoparticles have highly complex transfer function, which makes them impractical for the general imaging purpose. In recent studies, we presented a method of experimentally recording the transmission matrix of such media, which is a measure of the transfer function. In this review paper, we introduce two major applications of the transmission matrix: enhancing light energy delivery and imaging through scattering media. For the former, we identified the eigenchannels of the transmission matrix with large eigenvalues and then coupled light to those channels in order to enhance light energy delivery through the media. For the latter, we solved matrix inversion problem to reconstruct an object image from the distorted image by the scattering media. We showed the enlargement of the numerical aperture of imaging systems with the use of scattering media and demonstrated endoscopic imaging through a single multimode optical fiber working in both reflectance and fluorescence modes. Our approach will pave the way of using scattering media as unique optical elements for various biophotonics applications.
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Tayebi B, Jafarfard MR, Sharif F, Song YS, Har D, Kim DY. Large step-phase measurement by a reduced-phase triple-illumination interferometer. OPTICS EXPRESS 2015; 23:11264-11271. [PMID: 25969222 DOI: 10.1364/oe.23.011264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a reduced-phase triple-illumination interferometer (RPTII) as a novel single-shot technique to increase the precision of dual-illumination optical phase unwrapping techniques. The technique employs two measurement ranges to record both low-precision unwrapped and high-precision wrapped phases. To unwrap the high-precision phase, a hierarchical optical phase unwrapping algorithm is used with the low-precision unwrapped phase. The feasibility of this technique is demonstrated by measuring a stepped object with a height 2100 times greater than the wavelength of the source. The phase is reconstructed without applying any numerical unwrapping algorithms, and its noise level is decreased by a factor of ten.
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40
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Funamizu H, Shimoma S, Yuasa T, Aizu Y. Effects of spatiotemporal averaging processes on the estimation of spectral reflectance in color digital holography using speckle illuminations. APPLIED OPTICS 2014; 53:7072-7080. [PMID: 25402796 DOI: 10.1364/ao.53.007072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 09/11/2014] [Indexed: 06/04/2023]
Abstract
We present the effects of spatiotemporal averaging processes on an estimation of spectral reflectance in color digital holography using speckle illuminations. In this technique, speckle fields emitted from a multimode fiber are used as both a reference wave and a wavefront illuminating an object. The interference patterns of two coherent waves for three wavelengths are recorded as digital holograms on a CCD camera. Speckle fields are changed by vibrating the multimode fiber using a vibrator, and a number of holograms are acquired to average reconstructed images. After performing an averaging process, which we refer to as a temporal averaging process in this study, using images reconstructed from multiple holograms, a spatial averaging process is applied using a smoothing window function. For the estimation of spectral reflectance in reconstructed images, we use the Wiener estimation method. The effects of the averaging processes on color reproducibility are evaluated by a chromaticity diagram, the root-mean-square error, and color differences.
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Choi Y, Hosseini P, Choi W, Dasari RR, So PTC, Yaqoob Z. Dynamic speckle illumination wide-field reflection phase microscopy. OPTICS LETTERS 2014; 39:6062-5. [PMID: 25361156 PMCID: PMC4280270 DOI: 10.1364/ol.39.006062] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We demonstrate a quantitative reflection-phase microscope based on time-varying speckle-field illumination. Due to the short spatial coherence length of the speckle field, the proposed imaging system features superior lateral resolution, 520 nm, as well as high-depth selectivity, 1.03 μm. Off-axis interferometric detection enables wide-field and single-shot imaging appropriate for high-speed measurements. In addition, the measured phase sensitivity of this method, which is the smallest measurable axial motion, is more than 40 times higher than that available using a transmission system. We demonstrate the utility of our method by successfully distinguishing the motion of the top surface from that of the bottom in red blood cells. The proposed method will be useful for studying membrane dynamics in complex eukaryotic cells.
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Affiliation(s)
- Youngwoon Choi
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Corresponding author:
| | - Poorya Hosseini
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Wonshik Choi
- Department of Physics, Korea University, Seoul 136-701, South Korea
| | - Ramachandra R. Dasari
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Peter T. C. So
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Mechanical and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Zahid Yaqoob
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Nguyen TH, Edwards C, Goddard LL, Popescu G. Quantitative phase imaging with partially coherent illumination. OPTICS LETTERS 2014; 39:5511-4. [PMID: 25360915 DOI: 10.1364/ol.39.005511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
In this Letter, we formulate a mathematical model for predicting experimental outcomes in quantitative phase imaging (QPI) when the illumination field is partially spatially coherent. We derive formulae that apply to QPI and discuss expected results for two classes of QPI experiments: common path and traditional interferometry, under varying degrees of spatial coherence. In particular, our results describe the physical relationship between the spatial coherence of the illuminating field and the halo effect, which is well known in phase-contrast microscopy. We performed experiments relevant to this common situation and found that our theory is in excellent agreement with the data. With this new understanding of the effects of spatial coherence, our formulae offer an avenue for removing halo artifacts from phase images.
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Jung J, Kim K, Yu H, Lee K, Lee S, Nahm S, Park H, Park Y. Biomedical applications of holographic microspectroscopy [invited]. APPLIED OPTICS 2014; 53:G111-22. [PMID: 25322118 DOI: 10.1364/ao.53.00g111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The identification and quantification of specific molecules are crucial for studying the pathophysiology of cells, tissues, and organs as well as diagnosis and treatment of diseases. Recent advances in holographic microspectroscopy, based on quantitative phase imaging or optical coherence tomography techniques, show promise for label-free noninvasive optical detection and quantification of specific molecules in living cells and tissues (e.g., hemoglobin protein). To provide important insight into the potential employment of holographic spectroscopy techniques in biological research and for related practical applications, we review the principles of holographic microspectroscopy techniques and highlight recent studies.
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Yu H, Jang J, Lim J, Park JH, Jang W, Kim JY, Park Y. Depth-enhanced 2-D optical coherence tomography using complex wavefront shaping. OPTICS EXPRESS 2014; 22:7514-23. [PMID: 24718125 DOI: 10.1364/oe.22.007514] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report the enhancement in the obtained signal and penetration depth of 2-D depth-resolved images that were taken by shaping the incident wavefront in optical coherence tomography (OCT). Limitations in the penetration depth and signal to noise ratio (SNR) in OCT are mainly due to multiple scattering, which have been effectively suppressed by controlling the incident wavefront using a digital mirror device (DMD) in combination with spectral-domain OCT. The successful enhancements in the penetration depth and SNR are demonstrated in a wide-range of tissue phantoms, reaching depth enhancement of up to 92%. The hidden structures inside a tissue phantom that could not be seen in conventional OCT are clearly revealed through our proposed system. Its 2-D imaging capability, assisted by further optimization of the system for real-time acquisition speed will boost wide-spread use of OCT for in-vivo tissue diagnosis.
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Chowdhury S, Izatt JA. Structured illumination diffraction phase microscopy for broadband, subdiffraction resolution, quantitative phase imaging. OPTICS LETTERS 2014; 39:1015-8. [PMID: 24562266 PMCID: PMC4704703 DOI: 10.1364/ol.39.001015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Structured illumination microscopy (SIM) is an established technique that allows subdiffraction resolution imaging by heterodyning high sample frequencies into the system's passband via structured illumination. However, until now, SIM has been typically used to achieve subdiffraction resolution for intensity-based imaging. Here, we present a novel optical setup that uses structured illumination with a broadband light source to obtain noise-reduced, subdiffraction resolution, quantitative phase imaging (QPM) of cells. We compare this with a previous work for subdiffraction QPM imaging via SIM that used a laser source, and was thus still corrupted by coherent noise.
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Affiliation(s)
- Shwetadwip Chowdhury
- Department of Biomedical Engineering, Fitzpatrick Institute for Photonics, Duke University 136 Hudson Hall, Durham NC 27708, USA
| | - Joseph A. Izatt
- Department of Biomedical Engineering, Fitzpatrick Institute for Photonics, Duke University 136 Hudson Hall, Durham NC 27708, USA
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Kim K, Yoon H, Diez-Silva M, Dao M, Dasari RR, Park Y. High-resolution three-dimensional imaging of red blood cells parasitized by Plasmodium falciparum and in situ hemozoin crystals using optical diffraction tomography. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:011005. [PMID: 23797986 PMCID: PMC4019420 DOI: 10.1117/1.jbo.19.1.011005] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 05/06/2013] [Accepted: 05/29/2013] [Indexed: 05/18/2023]
Abstract
We present high-resolution optical tomographic images of human red blood cells (RBC) parasitized by malaria-inducing Plasmodium falciparum (Pf)-RBCs. Three-dimensional (3-D) refractive index (RI) tomograms are reconstructed by recourse to a diffraction algorithm from multiple two-dimensional holograms with various angles of illumination. These 3-D RI tomograms of Pf-RBCs show cellular and subcellular structures of host RBCs and invaded parasites in fine detail. Full asexual intraerythrocytic stages of parasite maturation (ring to trophozoite to schizont stages) are then systematically investigated using optical diffraction tomography algorithms. These analyses provide quantitative information on the structural and chemical characteristics of individual host Pf-RBCs, parasitophorous vacuole, and cytoplasm. The in situ structural evolution and chemical characteristics of subcellular hemozoin crystals are also elucidated.
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Affiliation(s)
- Kyoohyun Kim
- Korea Advanced Institute of Science and Technology, Department of Physics, Daejeon 305-701, Republic of Korea
| | - HyeOk Yoon
- Korea Advanced Institute of Science and Technology, Department of Physics, Daejeon 305-701, Republic of Korea
| | - Monica Diez-Silva
- Massachusetts Institute of Technology, Department of Material Science and Engineering, Cambridge, Massachusetts 02142
| | - Ming Dao
- Massachusetts Institute of Technology, Department of Material Science and Engineering, Cambridge, Massachusetts 02142
| | - Ramachandra R. Dasari
- Massachusetts Institute of Technology, George R. Harrison Spectroscopy Laboratory, Cambridge, Massachusetts 02194
| | - YongKeun Park
- Korea Advanced Institute of Science and Technology, Department of Physics, Daejeon 305-701, Republic of Korea
- Address all correspondence to: YongKeun Park, Korea Advanced Institute of Science and Technology, Department of Physics, 291 Daehak-Ro Yusung-Gu, Daejeon 305-701, Republic of Korea. Tel: (82) 42-350-2514; Fax: (82) 42-350-7160; E-mail:
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Li Y, Petrovic L, La J, Celli JP, Yelleswarapu CS. Digital holographic microscopy for longitudinal volumetric imaging of growth and treatment response in three-dimensional tumor models. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:116001. [PMID: 25364948 PMCID: PMC4462867 DOI: 10.1117/1.jbo.19.11.116001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Accepted: 09/24/2014] [Indexed: 05/03/2023]
Abstract
We report the use of digital holographic microscopy (DHM) as a viable microscopy approach for quantitative, nondestructive longitudinal imaging of in vitro three-dimensional (3-D) tumor models. Following established methods, we prepared 3-D cultures of pancreatic cancer cells in overlay geometry on extracellular matrix beds and obtained digital holograms at multiple time points throughout the duration of growth. The holograms were digitally processed and the unwrapped phase images were obtained to quantify the nodule thickness over time under normal growth and in cultures subject to chemotherapy treatment. In this manner, total nodule volumes are rapidly estimated and demonstrated here to show contrasting time-dependent changes during growth and in response to treatment. This work suggests the utility of DHM to quantify changes in 3-D structure over time and suggests the further development of this approach for time-lapse monitoring of 3-D morphological changes during growth and in response to treatment that would otherwise be impractical to visualize.
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Affiliation(s)
- Yuyu Li
- University of Massachusetts Boston, Department of Physics, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
| | - Ljubica Petrovic
- University of Massachusetts Boston, Department of Physics, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
| | - Jeffrey La
- University of Massachusetts Boston, Department of Physics, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
| | - Jonathan P. Celli
- University of Massachusetts Boston, Department of Physics, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
- Address all correspondence to: Jonathan P. Celli, E-mail: ; Chandra S. Yelleswarapu, E-mail:
| | - Chandra S. Yelleswarapu
- University of Massachusetts Boston, Department of Physics, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
- Address all correspondence to: Jonathan P. Celli, E-mail: ; Chandra S. Yelleswarapu, E-mail:
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Kim K, Kim KS, Park H, Ye JC, Park Y. Real-time visualization of 3-D dynamic microscopic objects using optical diffraction tomography. OPTICS EXPRESS 2013; 21:32269-78. [PMID: 24514820 DOI: 10.1364/oe.21.032269] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
3-D refractive index (RI) distribution is an intrinsic bio-marker for the chemical and structural information about biological cells. Here we develop an optical diffraction tomography technique for the real-time reconstruction of 3-D RI distribution, employing sparse angle illumination and a graphic processing unit (GPU) implementation. The execution time for the tomographic reconstruction is 0.21 s for 96(3) voxels, which is 17 times faster than that of a conventional approach. We demonstrated the real-time visualization capability with imaging the dynamics of Brownian motion of an anisotropic colloidal dimer and the dynamic shape change in a red blood cell upon shear flow.
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49
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Shipp DW, Qian R, Berger AJ. Angular-domain scattering interferometry. OPTICS LETTERS 2013; 38:4750-4753. [PMID: 24322123 DOI: 10.1364/ol.38.004750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present an angular-scattering optical method that is capable of measuring the mean size of scatterers in static ensembles within a field of view less than 20 μm in diameter. Using interferometry, the method overcomes the inability of intensity-based models to tolerate the large speckle grains associated with such small illumination areas. By first estimating each scatterer's location, the method can model between-scatterer interference as well as traditional single-particle Mie scattering. Direct angular-domain measurements provide finer angular resolution than digitally transformed image-plane recordings. This increases sensitivity to size-dependent scattering features, enabling more robust size estimates. The sensitivity of these angular-scattering measurements to various sizes of polystyrene beads is demonstrated. Interferometry also allows recovery of the full complex scattered field, including a size-dependent phase profile in the angular-scattering pattern.
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Wang Y, Meng P, Wang D, Rong L, Panezai S. Speckle noise suppression in digital holography by angular diversity with phase-only spatial light modulator. OPTICS EXPRESS 2013; 21:19568-19578. [PMID: 24105504 DOI: 10.1364/oe.21.019568] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A speckle noise suppression method in digital holography is proposed by the angular diversity with a phase-only spatial light modulator (SLM). The minimal angular difference of illumination beams is quantitatively analyzed to ensure the noncorrelation of any two speckle patterns, and then the phase-only SLM is employed to generate a series of tilted illumination beams. Comparing with the typical methods, the tilted illumination beams are controlled dynamically and accurately, which makes it possible to record a large number of holograms. Finally, using an image-plane digital holographic system, 117 holograms are recorded respectively, and the synthesized reconstructed images are obtained with the greatly suppressed speckle noise which is in good agreement with the theoretical results. The experimental results demonstrate the effectiveness, repeatability, and practicability of the proposed approach.
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