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METHOD FOR ASCERTAINING A GRADIENT CORRECTION VALUE, AND MAGNETIC RESONANCE SYSTEM OPERABLE WITH THE CORRECTED GRADIENT VOLUME
METHOD FOR ASCERTAINING A GRADIENT CORRECTION VALUE, AND MAGNETIC RESONANCE SYSTEM OPERABLE WITH THE CORRECTED GRADIENT VOLUME
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机译：确定梯度校正值的方法以及可校正梯度体积的磁共振系统
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摘要
In a method for ascertaining a gradient correction value for magnetic resonance (MR) examinations with an MR apparatus, a measurement slice is selected, with the center of the measurement slice being located outside of the isocenter of the MR scanner of the MR apparatus. A radio-frequency pulse is applied simultaneously with a slice gradient. The radio-frequency pulse is switched off and a reslice gradient is applied. A measurement signal is acquired. A phase shift is determined from the measurement signal, and a gradient correction time or a gradient correction amplitude is calculated using the phase shift.
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