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Result : Searchterm 'NMR' found in 3 terms [] and 39 definitions []
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Localized Magnetic Resonance
 
(LMR) A particular technique for obtaining NMR spectra, for example, of phosphorus, from a limited region by creating a sensitive volume with inhomogeneous applied gradient magnetic fields, which may be enhanced with the use of surface coils.
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Lorentzian Line
 
Usual shape of the lines in a NMR spectrum, characterized by a central peak with long tails; proportional to 1/[(1/T2)2 + (f - fo)2], where f is frequency and fo is the frequency of the peak (i.e., central resonance frequency). A Lorentzian function is the Fourier transformation of a decaying exponential.
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Magic Angle Effect (Artifact)InfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
Quick Overview
Artifact Information
NAME
Magic angle
DESCRIPTION
Increase of the T2 time, bright signal in tendons
REASON
Angle about 55° to the main magnetic field
HELP
Angle not about 55°
The magic angle is a precisely defined angle, the value is approximately 54.7°. Hence, two nuclei with a dipolar coupling vector at an angle of approximately 54.7° to a strong external magnetic field have zero dipolar coupling.
Magic angle spinning is a technique in solid-state NMR spectroscopy, which employs this principle to remove or reduce dipolar couplings, thereby increasing spectral resolution. In MRI, the magic angle effect visualizes as bright spots through an increased T2 time on short echo time (TE) images, for e.g. collagen fibers of tendons and ligaments, which are oriented at the magic angle of approximately 54.7° to the magnetic field.
mri safety guidance
Image Guidance
Take care that tendons and ligaments are not oriented at about a 54.7° angle to the main magnetic field.
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Further Reading:
  Basics:
Magic angle
   by en.wikipedia.org    
Magic Angle Effects
   by www.mritutor.org    
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Magnetic Resonance Tomography
 
(MRT) An alternative name of Magnetic Resonance Imaging (MRI).

List of alternative names:
Magnetic Resonance Imaging ( MRI )
Magnetic Resonance Tomography ( MRT )
Spin Mapping
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Further Reading:
  Basics:
Magnetic Resonance Imaging, History & Introduction
2000   by www.cis.rit.edu    
Tomographic Image Reconstruction
   by www.aapm.org    
  News & More:
3D Software to Model the Whole Human Body
Thursday, 12 November 2009   by news.softpedia.com    
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Multiple Sensitive Point
 
Sequential line imaging technique utilizing two orthogonal oscillating magnetic field gradients, a SFP pulse sequence, and signal averaging to isolate the NMR spectrometer sensitivity to a desired line in the body.
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