Fourier transform


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Related to Fourier transform: Fourier series, Laplace transform, Fast Fourier transform, Discrete Fourier transform

Fou·ri·er a·nal·y·sis

(fūr-ē-ā'),
a mathematical approximation of a function as the sum of periodic functions (sine and/or cosine waves) of different frequencies; a method of converting a function of time or space into a function of frequency; used in reconstruction of images in computed tomography and magnetic resonance imaging in radiology and in analysis of any kind of signal for its frequency content.

Fourier transform (FT)

[fo̅o̅ryā′]
Etymology: Jean B.J. Fourier, French mathematician, 1768-1830; L, transformare, to change form
a mathematical procedure that separates out the frequency components of a signal from its amplitudes as a function of time, or vice versa.

Fourier transform

A computational procedure used by MRI scanners to analyse and separate amplitude and phases of individual frequency components of the complex time varying signal, which allows spatial information to be reconstructed from the raw data.

Fou·ri·er trans·form

(fūr-ē-ā' trans'fōrm)
A mathematical technique of dividing a time-varying function or signal into components at different frequencies, giving the phase and amplitude of each; used in computed tomography and magnetic resonance image reconstruction transformation.

Fourier,

J.B.J., French mathematician and administrator, 1768-1830.
Fourier analysis - used in reconstruction of images in computed tomography and magnetic resonance imaging in radiology and in analysis of any kind of signal for its frequency content. Synonym(s): Fourier law; Fourier transform
Fourier law - Synonym(s): Fourier analysis
Fourier transform - Synonym(s): Fourier analysis
References in periodicals archive ?
A discrete-time approximation to the Fourier transform called DFT forms a foundation for fundamental techniques and applications of digital signal processing (DSP).
Storage and loss moduli are related to Fourier transforms of non-dimensional shear and bulk relaxation functions g(t) and k(t) though:
To carry out its mission, JRC-IRMM requires the procurement and installation of a Fourier transform infrared imaging microscope (FT-IR imaging microscope).
Tender for the supply, delivery, installation and commissioning of Fourier Transform Infra - Red (FTIR) spectroscopy equipment, for the setting up of a Solar Laboratory at the University of Malta.
In 1991, he moved to the University of Waterloo as Professor of Chemistry and of Physics and now holds an Industrial Research Chair in Fourier Transform Spectroscopy.
The company deals in production of pyroelectric detectors based on lithium tantalate (LiTaO3) for industrial gas analysis, medical technology and flame recognition, and on deuterated L-alanine-doped triglycine sulfate (DLaTGS) for Fourier transform infrared (FTIR) spectrometers and terahertz applications.
It may be said that signal processing is the coin of the electronic realm, and here contributors examine topics as hyperbolic geometry, Nehari's theorem, electronic circuits and analog signal processing, engineering applications of the Motion-Group Fourier transform, fast x-ray and beamlet transforms for 3D data, Fourier analysis and phylogenetic trees, diverse tomography, matrix-valued spherical functions, image resolution for MRI, image compression, integrating sensing and processing for statistical pattern recognition, sampling of functions and sections for compact groups, the Cooley-Tukey FFT and group theory, signal processing in optic fibers, and the generalized spike process.
Chapter 14: Fourier Transform Infrared Spectroscopy in Analysis of Chemicals Related to the Chemical Weapons Convention (Martin T.
After describing basic concepts such as Radon transforms, the gamma-function, the Fourier transform of distributions, fractional derivatives, and positive definite distributions, Koldobsky describes volume and the Fourier transform, intersection bodies, the Buseman-Petty problem, intersection bodies and Lp-spaces (including Schoenberg's problems on positive definitive functions), Ball's theorem and projections and the Fourier transform.
Tenders are invited for Fourier Transform Terahertz Spectrometer for Low Temperature and High Magnetic Field Enviroment,
Contract notice: Delivery spectrometer fourier transform infrared spectra and library (ft-ir) for the center biological and chemical sciences, university of warsaw - ochota campus (cent iii).
He includes special topics and applications such as the discrete Fourier transform, Fraunhofer diffraction and Fourier optics.

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