Selective excitation method and apparatus utilizing non-linear error in a gradient for magnetic resonance imaging
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United States of America Patent
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Mar 19, 2002
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app pub date -
Apr 21, 2000
filing date -
Jun 24, 1999
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Abstract
In order to provide a selective excitation method and apparatus that is not affected by the non-linearity of a gradient magnetic field, and a magnetic resonance imaging method and apparatus employing such a selective excitation apparatus, a frequency f is employed as an RF excitation frequency, corresponding to a slice position Z.sub.c redefined differently from a specified slice position Z.sub.a according to a non-linearity error in a gradient magnetic field Gz. Alternatively, the gradient is adjusted so that the frequency of spins at a specified slice position Z.sub.a equals to a frequency f of the RF excitation signal.
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