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pulse programmer of MRI
Essay specific features
Written by:
Mary P
Date added:
April 3, 2011
Level:
University
Grade:
A
No of pages / words:
22 / 6158
Was viewed:
8691 times
Rating of current essay:
Essay content:
Unlike CT it uses no ionizing radiation, but uses a powerful magnetic field to align the magnetization of hydrogen atoms in the body. Radio waves are used to systematically alter the alignment of this magnetization, causing the hydrogen atoms to produce a rotating magnetic field detectable by the scanner...
displayed 300 characters
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This signal can be manipulated by additional magnetic fields to build up enough information to reconstruct an image of the body.
Magnetic resonance spectroscopy is used to measure the levels of different metabolites in body tissues. The MR signal produces a spectrum of resonances that correspond to different molecular arrangements of the isotope being "excited"...
displayed 300 characters
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