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Kong X, Xiao K, Zhou X, Wang Z. Single-exposure quantitative differential interference contrast microscopy using bandlimited image and its Fourier transform constraints. OPTICS EXPRESS 2024; 32:13277-13292. [PMID: 38859302 DOI: 10.1364/oe.519412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/11/2024] [Indexed: 06/12/2024]
Abstract
Phase microscopy that records the bandlimited image and its Fourier image simultaneously (BIFT) is a phase retrieval method with unique and rapid convergence. In this paper, we present a single-exposure quantitative differential interference contrast (DIC) microscopy based on BIFT method. The contrasts of the recorded DIC image and its Fourier image, analyzed by simulation and experiment, can be largely improved by the initial phase difference between two sheared lights (bias), however their trends with biases are opposite. By adding the optimized bias with the compromise of the contrasts in image and Fourier space, the phase sensitivity can be improved than BIFT method only. We have experimentally demonstrated that a sample of 25 nm height can be successfully recovered from a single exposure. The presented single-exposure quantitative DIC microscopy provides a promising technique for real-time phase imaging.
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Kong X, Xiao K, Wang K, Li W, Sun J, Wang Z. Phase microscopy using band-limited image and its Fourier transform constraints. OPTICS LETTERS 2023; 48:3251-3254. [PMID: 37319074 DOI: 10.1364/ol.487626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/12/2023] [Indexed: 06/17/2023]
Abstract
In this Letter, we present a new, to the best of our knowledge, form of single-exposure quantitative phase microscopy based on the phase retrieval method by recording the band-limited image and its Fourier image simultaneously. Applying the intrinsic physical constraints of microscopy systems in the phase retrieval algorithm, we remove the inherent ambiguities of the reconstruction and achieve a rapid iterative convergence. In particular, this system does not require tight support of the object and the oversampling needed in coherent diffraction imaging. We have demonstrated that, in both simulations and experiments, the phase can be rapidly retrieved from a single-exposure measurement using our algorithm. The presented phase microscopy provides a promising technique for real-time quantitative biological imaging.
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Fevola G, Bergbäck Knudsen E, Ramos T, Carbone D, Wenzel Andreasen J. A Monte Carlo ray-tracing simulation of coherent X-ray diffractive imaging. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:134-145. [PMID: 31868746 DOI: 10.1107/s1600577519014425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/22/2019] [Indexed: 05/28/2023]
Abstract
Coherent diffractive imaging (CDI) experiments are adequately simulated assuming the thin sample approximation and using a Fresnel or Fraunhofer wavefront propagator to obtain the diffraction pattern. Although this method is used in wave-based or hybrid X-ray simulators, here the applicability and effectiveness of an alternative approach that is based solely on ray tracing of Huygens wavelets are investigated. It is shown that diffraction fringes of a grating-like source are accurately predicted and that diffraction patterns of a ptychography dataset from an experiment with realistic parameters can be sampled well enough to be retrieved by a standard phase-retrieval algorithm. Potentials and limits of this approach are highlighted. It is suggested that it could be applied to study imperfect or non-standard CDI configurations lacking a satisfactory theoretical formulation. The considerable computational effort required by this method is justified by the great flexibility provided for easy simulation of a large-parameter space.
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Affiliation(s)
- Giovanni Fevola
- Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000, Denmark
| | - Erik Bergbäck Knudsen
- Department of Physics, Technical University of Denmark, Fysikvej 311, Kgs Lyngby 2800, Denmark
| | - Tiago Ramos
- Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000, Denmark
| | - Dina Carbone
- MAX IV Laboratory, Lund University, 22484 Lund, Sweden
| | - Jens Wenzel Andreasen
- Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000, Denmark
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Abstract
Coherent diffractive imaging (CDI) has been widely applied in the physical and biological sciences using synchrotron radiation, X-ray free-electron laser, high harmonic generation, electrons, and optical lasers. One of CDI’s important applications is to probe dynamic phenomena with high spatiotemporal resolution. Here, we report the development of a general in situ CDI method for real-time imaging of dynamic processes in solution. By introducing a time-invariant overlapping region as real-space constraint, we simultaneously reconstructed a time series of complex exit wave of dynamic processes with robust and fast convergence. We validated this method using optical laser experiments and numerical simulations with coherent X-rays. Our numerical simulations further indicated that in situ CDI can potentially reduce radiation dose by more than an order of magnitude relative to conventional CDI. With further development, we envision in situ CDI could be applied to probe a range of dynamic phenomena in the future. Coherent diffractive imaging (CDI) allows for high resolution imaging without lenses. Here, Lo et al. develop in situ CDI with real-time imaging and a corresponding low-dose requirement, with expected applications in the physical and life sciences.
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Kim Y, Kim C, Kwon OY, Nam D, Kim SS, Park JH, Kim S, Gallagher-Jones M, Kohmura Y, Ishikawa T, Song C, Tae G, Noh DY. Visualization of a Mammalian Mitochondrion by Coherent X-ray Diffractive Imaging. Sci Rep 2017; 7:1850. [PMID: 28500280 PMCID: PMC5431869 DOI: 10.1038/s41598-017-01833-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/05/2017] [Indexed: 12/04/2022] Open
Abstract
We report a three dimensional (3D) quantitative visualization of a mammalian mitochondrion by coherent x-ray diffractive imaging (CXDI) using synchrotron radiation. The internal structures of a mitochondrion from a mouse embryonic fibroblast cell line (NIH3T3) were visualized by tomographic imaging at approximately 60 nm resolution without the need for sectioning or staining. The overall structure consisted of a high electron density region, composed of the outer and inner membranes and the cristae cluster, which enclosed the lower density mitochondrial matrix. The average mass density of the mitochondrion was about 1.36 g/cm3. Sectioned images of the cristae reveal that they have neither a baffle nor septa shape but were instead irregular. In addition, a high resolution, about 14 nm, 2D projection image was captured of a similar mitochondrion with the aid of strongly scattering Au reference objects. Obtaining 3D images at this improved resolution will allow CXDI to be an effective and nondestructive method for investigating the innate structure of mitochondria and other important life supporting organelles.
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Affiliation(s)
- Yoonhee Kim
- Department of Physics and Photon Science & School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
| | - Chan Kim
- Department of Physics and Photon Science & School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea.,European XFEL, Schenefeld, 22869, Germany
| | - Ou Young Kwon
- Department of Physics and Photon Science & School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
| | - Daewoong Nam
- Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Sang Soo Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Jae Hyun Park
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Sunam Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Marcus Gallagher-Jones
- RIKEN SPring-8 Center, Kouto 1-1-1, Hyogo, 679-5148, Japan.,Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles, California, 90095, USA
| | | | | | - Changyong Song
- Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea.,RIKEN SPring-8 Center, Kouto 1-1-1, Hyogo, 679-5148, Japan
| | - Giyoong Tae
- Department of Physics and Photon Science & School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
| | - Do Young Noh
- Department of Physics and Photon Science & School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea.
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