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Phase-contrast X-ray imaging

Index Phase-contrast X-ray imaging

Phase-contrast X-ray imaging (PCI) or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images. [1]

93 relations: Absorbed dose, Aspect ratio, Atom interferometer, Atomic number, Attenuation, Ångström, Barn (unit), Biological small-angle scattering, Bone disease, Bragg's law, Classical electron radius, Cross section (physics), CSIRO, CT scan, Derivative, Diffraction grating, Dispersion (optics), Dynamical theory of diffraction, Edge enhancement, Electroplating, Etching (microfabrication), European Synchrotron Radiation Facility, Fossil, Fourier series, Franz Pfeiffer (physicist), Fresnel diffraction, Frits Zernike, Full width at half maximum, Geometrical optics, Gradient, Grazing incidence diffraction, Group velocity, Henry Fox Talbot, Holography, Instantaneous phase, Interferometry, John Clauser, Karlsruhe Institute of Technology, Kirchhoff's diffraction formula, Laplace operator, LIGA, Light, Linearization, Mammography, Micrometre, Modular arithmetic, Moiré pattern, Molding (process), Near-field optics, Nobel Prize, ..., Nobel Prize in Physics, Optical microscope, Osteoarthritis, Osteoporosis, Paleontology, Paul Scherrer Institute, Phase (waves), Phase retrieval, Phase velocity, Phase-contrast imaging, Phase-contrast microscopy, Photolithography, Plane wave, Polarization (waves), Principle of relativity, Projectional radiography, Radian, Radiography, Radon transform, Ray (optics), Sample (material), Shack–Hartmann wavefront sensor, Single crystal, Snell's law, Soft tissue, Speed of light, Storage ring, Synchrotron, Synchrotron radiation, Talbot effect, Tomographic reconstruction, Tomography, Wafer (electronics), Wave interference, Wave vector, Wavelength, Wavenumber, Wilhelm Röntgen, X-ray, X-ray detector, X-ray lithography, X-ray tube, 3D projection. Expand index (43 more) »

Absorbed dose

Absorbed dose is a measure of the energy deposited in a medium by ionizing radiation.

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Aspect ratio

The aspect ratio of a geometric shape is the ratio of its sizes in different dimensions.

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Atom interferometer

An atom interferometer is an interferometer which uses the wave character of atoms.

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Atomic number

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.

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Attenuation

In physics, attenuation or, in some contexts, extinction is the gradual loss of flux intensity through a medium.

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Ångström

The ångström or angstrom is a unit of length equal to (one ten-billionth of a metre) or 0.1 nanometre.

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Barn (unit)

A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2).

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Biological small-angle scattering

Biological small-angle scattering is a small-angle scattering method for structure analysis of biological materials.

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Bone disease

Bone disease refers to the medical conditions which affect the bone.

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Bragg's law

In physics, Bragg's law, or Wulff–Bragg's condition, a special case of Laue diffraction, gives the angles for coherent and incoherent scattering from a crystal lattice.

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Classical electron radius

The classical electron radius is a combination of fundamental physical quantities that define a length scale for problems involving electrons interacting with electromagnetic radiation.

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Cross section (physics)

When two particles interact, their mutual cross section is the area transverse to their relative motion within which they must meet in order to scatter from each other.

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CSIRO

The Commonwealth Scientific and Industrial Research Organisation (CSIRO) is an independent Australian federal government agency responsible for scientific research.

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CT scan

A CT scan, also known as computed tomography scan, makes use of computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting.

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Derivative

The derivative of a function of a real variable measures the sensitivity to change of the function value (output value) with respect to a change in its argument (input value).

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Diffraction grating

In optics, a diffraction grating is an optical component with a periodic structure that splits and diffracts light into several beams travelling in different directions.

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Dispersion (optics)

In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency.

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Dynamical theory of diffraction

The dynamical theory of diffraction describes the interaction of waves with a regular lattice.

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Edge enhancement

Edge enhancement is an image processing filter that enhances the edge contrast of an image or video in an attempt to improve its acutance (apparent sharpness).

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Electroplating

Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode.

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Etching (microfabrication)

Etching is used in microfabrication to chemically remove layers from the surface of a wafer during manufacturing.

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European Synchrotron Radiation Facility

The European Synchrotron Radiation Facility (ESRF) is a joint research facility situated in Grenoble, France, and supported by 22 countries (13 member countries: France, Germany, Italy, UK, Spain, Switzerland, Belgium, The Netherlands, Denmark, Finland, Norway, Sweden, Russia and 9 associate countries: Austria, Portugal, Israel, Poland, Czech Republic, Hungary, Slovakia, India and South Africa).

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Fossil

A fossil (from Classical Latin fossilis; literally, "obtained by digging") is any preserved remains, impression, or trace of any once-living thing from a past geological age.

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Fourier series

In mathematics, a Fourier series is a way to represent a function as the sum of simple sine waves.

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Franz Pfeiffer (physicist)

Franz Pfeiffer (born 25 November 1972 in Kösching, Germany) is a German physicist known for his contributions to the development of Phase-contrast X-ray imaging and its applications in biomedical research.

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Fresnel diffraction

In optics, the Fresnel diffraction equation for near-field diffraction is an approximation of the Kirchhoff–Fresnel diffraction that can be applied to the propagation of waves in the near field.

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Frits Zernike

Frits Zernike (16 July 1888 – 10 March 1966) was a Dutch physicist and winner of the Nobel Prize for physics in 1953 for his invention of the phase-contrast microscope.

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Full width at half maximum

Full width at half maximum (FWHM) is an expression of the extent of function given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value.

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Geometrical optics

Geometrical optics, or ray optics, describes light propagation in terms of rays.

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Gradient

In mathematics, the gradient is a multi-variable generalization of the derivative.

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Grazing incidence diffraction

Grazing incidence X-ray and neutron diffraction (GID, GIXD, GIND), typically from a crystalline structure uses small incident angles for the incoming X-ray or neutron beam, so that diffraction can be made surface sensitive.

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Group velocity

The group velocity of a wave is the velocity with which the overall shape of the wave's amplitudes—known as the modulation or envelope of the wave—propagates through space.

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Henry Fox Talbot

William Henry Fox Talbot FRS (11 February 180017 September 1877) was a British scientist, inventor and photography pioneer who invented the salted paper and calotype processes, precursors to photographic processes of the later 19th and 20th centuries.

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Holography

Holography is the science and practice of making holograms.

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Instantaneous phase

Instantaneous phase and instantaneous frequency are important concepts in signal processing that occur in the context of the representation and analysis of time-varying functions.

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Interferometry

Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.

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John Clauser

John Francis Clauser (born December 1, 1942 in Pasadena, California) is an American theoretical and experimental physicist known for contributions to the foundations of quantum mechanics, in particular the Clauser-Horne-Shimony-Holt inequality.

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Karlsruhe Institute of Technology

The Karlsruhe Institute of Technology (KIT) (Karlsruher Institut für Technologie) is a public research university and one of the largest research and educational institutions in Germany.

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Kirchhoff's diffraction formula

Kirchhoff's diffraction formula (also Fresnel–Kirchhoff diffraction formula) can be used to model the propagation of light in a wide range of configurations, either analytically or using numerical modelling.

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Laplace operator

In mathematics, the Laplace operator or Laplacian is a differential operator given by the divergence of the gradient of a function on Euclidean space.

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LIGA

LIGA is a German acronym for Lithographie, Galvanoformung, Abformung (Lithography, Electroplating, and Molding) that describes a fabrication technology used to create high-aspect-ratio microstructures.

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Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.

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Linearization

In mathematics, linearization is finding the linear approximation to a function at a given point.

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Mammography

Mammography (also called mastography) is the process of using low-energy X-rays (usually around 30 kVp) to examine the human breast for diagnosis and screening.

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Micrometre

The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling (SI standard prefix "micro-".

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Modular arithmetic

In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" upon reaching a certain value—the modulus (plural moduli).

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Moiré pattern

In mathematics, physics, and art, a moiré pattern or moiré fringes are large-scale interference patterns that can be produced when an opaque ruled pattern with transparent gaps is overlaid on another similar pattern.

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Molding (process)

Molding or moulding (see spelling differences) is the process of manufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix.

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Near-field optics

Near-field optics is that branch of optics that considers configurations that depend on the passage of light to, from, through, or near an element with subwavelength features, and the coupling of that light to a second element located a subwavelength distance from the first.

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Nobel Prize

The Nobel Prize (Swedish definite form, singular: Nobelpriset; Nobelprisen) is a set of six annual international awards bestowed in several categories by Swedish and Norwegian institutions in recognition of academic, cultural, or scientific advances.

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Nobel Prize in Physics

The Nobel Prize in Physics (Nobelpriset i fysik) is a yearly award given by the Royal Swedish Academy of Sciences for those who conferred the most outstanding contributions for mankind in the field of physics.

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Optical microscope

The optical microscope, often referred to as the light microscope, is a type of microscope that uses visible light and a system of lenses to magnify images of small subjects.

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Osteoarthritis

Osteoarthritis (OA) is a type of joint disease that results from breakdown of joint cartilage and underlying bone.

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Osteoporosis

Osteoporosis is a disease where increased bone weakness increases the risk of a broken bone.

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Paleontology

Paleontology or palaeontology is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene Epoch (roughly 11,700 years before present).

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Paul Scherrer Institute

The Paul Scherrer Institute (PSI) is a multi-disciplinary research institute which belongs to the Swiss Federal Institutes of Technology Domain covering also ETH Zurich and EPFL.

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Phase (waves)

Phase is the position of a point in time (an instant) on a waveform cycle.

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Phase retrieval

Phase retrieval is the process of algorithmically finding solutions to the phase problem.

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Phase velocity

The phase velocity of a wave is the rate at which the phase of the wave propagates in space.

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Phase-contrast imaging

Phase-contrast imaging is a method of imaging that has a range of different applications.

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Phase-contrast microscopy

Phase-contrast microscopy is an optical microscopy technique that converts phase shifts in light passing through a transparent specimen to brightness changes in the image.

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Photolithography

Photolithography, also termed optical lithography or UV lithography, is a process used in microfabrication to pattern parts of a thin film or the bulk of a substrate.

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Plane wave

In the physics of wave propagation, a plane wave (also spelled planewave) is a wave whose wavefronts (surfaces of constant phase) are infinite parallel planes.

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Polarization (waves)

Polarization (also polarisation) is a property applying to transverse waves that specifies the geometrical orientation of the oscillations.

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Principle of relativity

In physics, the principle of relativity is the requirement that the equations describing the laws of physics have the same form in all admissible frames of reference.

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Projectional radiography

Projectional radiography is a form of radiography and medical imaging that produces two-dimensional images by x-ray radiation.

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Radian

The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.

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Radiography

Radiography is an imaging technique using X-rays to view the internal form of an object.

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Radon transform

In mathematics, the Radon transform is the integral transform which takes a function f defined on the plane to a function Rf defined on the (two-dimensional) space of lines in the plane, whose value at a particular line is equal to the line integral of the function over that line.

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Ray (optics)

In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.

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Sample (material)

In general, a sample is a limited quantity of something which is intended to be similar to and represent a larger amount of that thing(s).

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Shack–Hartmann wavefront sensor

A Shack–Hartmann (or Hartmann–Shack) wavefront sensor (SHWFS) is an optical instrument used for characterizing an imaging system.

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Single crystal

A single crystal or monocrystalline solid is a material in which the crystal lattice of the entire sample is continuous and unbroken to the edges of the sample, with no grain boundaries.

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Snell's law

Snell's law (also known as Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.

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Soft tissue

In anatomy, soft tissue includes the tissues that connect, support, or surround other structures and organs of the body, not being hard tissue such as bone.

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Speed of light

The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.

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Storage ring

A storage ring is a type of circular particle accelerator in which a continuous or pulsed particle beam may be kept circulating typically for many hours.

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Synchrotron

A synchrotron is a particular type of cyclic particle accelerator, descended from the cyclotron, in which the accelerating particle beam travels around a fixed closed-loop path.

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Synchrotron radiation

Synchrotron radiation (also known as magnetobremsstrahlung radiation) is the electromagnetic radiation emitted when charged particles are accelerated radially, i.e., when they are subject to an acceleration perpendicular to their velocity.

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Talbot effect

The Talbot effect is a near-field diffraction effect first observed in 1836 by Henry Fox Talbot.

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Tomographic reconstruction

Tomographic reconstruction is a type of multidimensional inverse problem where the challenge is to yield an estimate of a specific system from a finite number of projections.

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Tomography

Tomography is imaging by sections or sectioning, through the use of any kind of penetrating wave.

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Wafer (electronics)

A wafer, also called a slice or substrate, is a thin slice of semiconductor material, such as a crystalline silicon, used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells.

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Wave interference

In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

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Wave vector

In physics, a wave vector (also spelled wavevector) is a vector which helps describe a wave.

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Wavelength

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

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Wavenumber

In the physical sciences, the wavenumber (also wave number or repetency) is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance.

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Wilhelm Röntgen

Wilhelm Conrad Röntgen (27 March 1845 – 10 February 1923) was a German mechanical engineer and physicist, who, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays, an achievement that earned him the first Nobel Prize in Physics in 1901.

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X-ray

X-rays make up X-radiation, a form of electromagnetic radiation.

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X-ray detector

X-ray detectors are devices used to measure the flux, spatial distribution, spectrum, and/or other properties of X-rays.

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X-ray lithography

X-ray lithography, is a process used in electronic industry to selectively remove parts of a thin film.

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X-ray tube

An X-ray tube is a vacuum tube that converts electrical input power into X-rays.

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3D projection

3D projection is any method of mapping three-dimensional points to a two-dimensional plane.

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Redirects here:

Phase-contrast x-ray imaging, X-ray Phase Contrast Tomography, X-ray phase-contrast imaging.

References

[1] https://en.wikipedia.org/wiki/Phase-contrast_X-ray_imaging

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