MRI apparatus
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United States of America Patent
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Mar 17, 1998
Grant Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Mar 28, 1995
priority date (Note) -
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Abstract
The present invention relates to an MRI apparatus capable of preventing the quality of an image from being degraded under the influence of eddy currents and residual magnetization caused by a phase encode gradient. While an RF pulse P1 is sent, a phase encode gradient gy(i) is applied to a warp axis and a read gradient rr is applied to a read axis, an NMR signal is received, followed by application of a rewind gradient gyr(i)' to the warp axis. The rewind gradient gyr(i)' is defined as '(a basic component of opposite polarity equal in time integral value to the phase encode gradient gy(i))+(a warp-axis correction component for correcting the influence of eddy currents or residual magnetization caused by the phase encode gradient gy(i))'.
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