Magnetic resonance imaging Fourier transform

FCS FT fMRI FTIR Fluorescence Correlation Spectroscopy Fourier Transform Functional Magnetic Resonance Imaging Fourier Transform Infrared Spectroscopy... 

MALDI-Fourier transform ion cyclotron resonance mass spectrometry MALDI-Q-ion mobility-TOFMS MALDI-Quadrupole-ion-trap-TOF mass spectrometry MALDI-TOF-imaging mass spectrometry MALDI Time-of-flight mass spectrometry Magnetic resonance imaging Matrix solution fixation Moxifloxacin... 

For 2D systems with circular symmetry, the relevant information is in the radial direction. Therefore, instead of calculating its 2D Fourier transform by (4.1.10), evaluation of a radial ID Fourier transformation is sufficient. In magnetic resonance imaging [Majl]... 

FTIR = Fourier transform infrared spectroscopy MRI = magnetic resonance imaging NMR = nuclear magnetic resonance THF = tetrahydrofuran XRD = X-ray diffraction. 

ESR = Electron Spin Resonance FT-ICR = Fourier Transform Ion Cyclotron Resonance LUMO = lowest unoccupied molecular orbital MRI = Magnetic Resonance Imaging XRD = X-ray Diffraction MEM = Maximum Entropy Method. 

Ti) and spin-spin (T2) relaxation time constants. Fourier transformation of the time domain data produces a frequency spectrum where the amplitude at each frequency is a measure of the number of nuclei in the corresponding region in space. In magnetic resonance imaging a multivariate slice for one pulse sequence is used if spatial resolution is most important. A full NMR spectrum can be produced for a single point inside the material if the spectral aspect is most important. 

Fig. 6 Schematic of a FTICR MS instrument. This type of MS consists of an ion cyclotron resonance (ICR) analyzer cell that is situated in the homogeneous region of a large magnet. The ions introduced into the ICR analyzer are constrained (trapped) by the magnetic field to move in circular orbits with a specific frequency that corresponds to a specific mass-to-charge ratio (m/z). Mass analysis occurs when radiofrequency (rf) potential is applied (pulsed) to the ICR analyzer so that all ions are accelerated to a larger orbit radius. After the pulse is turned off, the transient image current is acquired and a Fourier transform separates the individual cyclotron frequencies. Repeating this pulsing process to accumulate several transients is used to improve the signal-to-noise ratio. (Courtesy of Bruker Daltonics, Billerica, MA.)...

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