MRI apparatus which has reduced ghost artifacts due to Maxwell term phase error
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United States of America Patent
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Jan 28, 2003
Grant Date -
N/A
app pub date -
Aug 16, 2000
filing date -
Sep 28, 1999
priority date (Note) -
Expired
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Abstract
In order to reduce ghost artifacts due to a Maxwell term phase error caused by a data acquisition read gradient, an n-th Maxwell term collection pulse MTCP.sub.n is appended before an inversion RF pulse RF180 for an n-th shot in an I-echo N-shot EPI pulse sequence. The n-th Maxwell term collection pulse MTCP.sub.n has a waveform whose time integral value is zero, and gives a bias phase error such that a Maxwell term phase error which is caused by a data acquisition read gradient and contained in data filling out a k-space smoothly varies from a 1.sup.st row to an N.multidot.I-th row in the direction of a phase encoding axis.
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