Grundlagen der Magnetresonanz-Tomographie

Precession on
a gyroscope. Note that the angular momentum vector is pointing starting at the top point towards the fixed point (also applies to the gimbal).
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Differential
diagnosis of uncommon prostate diseases: combining mpMRI and clinical information. BPH in a 66-year-old man with an elevated serum PSA level fluctuating from 4 to 10 ng/mL. a–g Axial T2-weighted images captured in Jan 2010 (size of 1.3 cm), May 2012, Mar 2013, Dec 2013, Feb 2015, May 2015, and Jul 2019 (size of 2.6 cm) show a gradually increasing nodule with heterogeneous hyperintensity and a well-defined capsule in the left peripheral zone (arrow), the size of which increases with the progress of BPH in the TZ (☆)
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Nuclear magnetic resonance (NMR) is a powerful technique which allows the study of the magnetic properties of an atom's nucleus . It involves placing nuclei within an external magnetic field enabling thus them to undergo precession . The 'resonance' part of the names implies the fact that a second (usually perpendicular) radiofrequency pulse tuned to the precessional frequency of target nuclei allows them to absorb and then emit electromagnetic energy .

Nuclear magnetic resonance is exploited in a number disciplines and fields, including magnetic resonance imaging, molecular physics and chemistry.  An offshoot of this technique, nuclear magnetic resonance spectroscopy allows precise analysis of molecular constitution of a chemical microenvironment .

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Assoziationen und Differentialdiagnosen zu Grundlagen der Magnetresonanz-Tomographie:
precession
 
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magic angle
effect
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Gibbs-Artefakte
 
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diffusionsgewichtete
Bildgebung
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Einfaltungsartefakte
 
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Suszeptibilitätsartefakt
 
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