Magnetic field inhomogeneity measurement method and apparatus, phase correction method and apparatus, and magnetic resonance imaging apparatus
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United States of America Patent
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Feb 4, 2003
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N/A
app pub date -
May 22, 2000
filing date -
Jun 24, 1999
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Expired
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Abstract
In order to perform imaging with water and fat separated in an efficient manner, a tomographic image is obtained having a phase difference of .pi./2 between water and fat using magnetic resonance (700), the phase of the tomographic image is multiplied by n (706), the phase after being corrected for wraparound is multiplied by 1/n (714, 716), and a phase image representing magnetic field inhomogeneity is generated. The tomographic image is corrected for phase using the phase image (718), and is separated into a water image and a fat image (726).
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