Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

5.6K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
5.6K
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

7.1K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
7.1K
Aliasing01:18

Aliasing

163
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
163
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

727
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
727
Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

348
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
348
Convergence of Fourier Series01:21

Convergence of Fourier Series

173
The Fourier series is a powerful mathematical tool for representing periodic signals as an infinite sum of complex exponentials. In practice, this infinite series is truncated to a finite number of terms, yielding a partial sum. This truncation makes the approximation of the signal feasible but introduces certain challenges, particularly near discontinuities, known as the Gibbs phenomenon.
The Gibbs phenomenon refers to the persistent oscillations and overshoots that occur near discontinuities...
173

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Two-dimensional fluorescence in-gel electrophoresis of coronary restenosis tissues in minipigs: increased adipocyte fatty acid binding protein induces reactive oxygen species-mediated growth and migration in smooth muscle cells.

Arteriosclerosis, thrombosis, and vascular biology·2013
Same author

Purification and characterization of mutant miniPlasmin for thrombolytic therapy.

Thrombosis journal·2013
Same author

[Mechanisms of resistance to EML4-ALK inhibitors in non-small cell lung cancer].

Zhongguo fei ai za zhi = Chinese journal of lung cancer·2013
Same author

NK4 gene therapy inhibits HGF/Met-induced growth of human cholangiocarcinoma cells.

Digestive diseases and sciences·2013
Same author

[Low-grade extraskeletal osteosarcoma of mediastinum: report of a case].

Zhonghua bing li xue za zhi = Chinese journal of pathology·2013
Same author

MedTxting: learning based and knowledge rich SMS-style medical text contraction.

AMIA ... Annual Symposium proceedings. AMIA Symposium·2013

Related Experiment Video

Updated: Jul 22, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.5K

Fourier-transform ghost imaging with super-Rayleigh speckles.

Qian Chen, Zhijie Tan, Hong Yu

    Optics Express
    |July 21, 2023
    PubMed
    Summary

    This study introduces super-Rayleigh speckles for Fourier-transform ghost imaging, enhancing image quality in low photon flux conditions. This breakthrough improves high-resolution imaging, particularly for photon-limited laboratory x-ray systems.

    More Related Videos

    Spectral Reflectometric Microscopy on Myelinated Axons In Situ
    09:13

    Spectral Reflectometric Microscopy on Myelinated Axons In Situ

    Published on: July 2, 2018

    7.4K
    A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors
    11:15

    A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

    Published on: May 30, 2016

    25.3K

    Related Experiment Videos

    Last Updated: Jul 22, 2025

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
    06:25

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

    Published on: February 12, 2014

    8.5K
    Spectral Reflectometric Microscopy on Myelinated Axons In Situ
    09:13

    Spectral Reflectometric Microscopy on Myelinated Axons In Situ

    Published on: July 2, 2018

    7.4K
    A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors
    11:15

    A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

    Published on: May 30, 2016

    25.3K

    Area of Science:

    • Optics and Photonics
    • Image Reconstruction
    • X-ray Imaging

    Background:

    • Ghost imaging leverages high-order optical field correlations, extending to X-ray applications.
    • Low photon flux severely degrades image quality in X-ray ghost imaging.

    Purpose of the Study:

    • To develop a novel ghost imaging approach for high-quality imaging at low photon flux.
    • To enhance Fourier-transform ghost imaging using super-Rayleigh speckles.

    Main Methods:

    • Designed super-Rayleigh speckles by optimizing binary modulating screens using a direct binary search algorithm.
    • Implemented Fourier-transform ghost imaging with the designed speckles.

    Main Results:

    • Achieved significantly enhanced speckle contrast.
    • Obtained high-visibility Fourier-transform diffraction patterns.
    • Successfully reconstructed spatial domain images at photon levels as low as 0.1 photons/pixel.

    Conclusions:

    • The proposed method enables high-quality ghost imaging under photon-limited conditions.
    • This technique is crucial for high-resolution imaging in scenarios with limited photon flux, such as laboratory X-ray systems.