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CHARACTERIZATION OF TIME DELAYS OF RECEIVER DEMODULATION FOR CORRECTING OFF-AXIS MR IMAGING DEGRADATION

机译:纠正轴外MR成像退化的接收器解调的时间延迟特性

摘要

A calibration procedure is performed prior to an off-axis MR scan to measure the MRI system timing errors in applying a frequency modulation waveform to the system receiver. Phase errors which otherwise occur when performing non-Cartesian scans are either prospectively reduced by offsetting the timing error or retrospectively offset by applying phase corrections to the acquired image data.
机译:在离轴MR扫描之前执行校准程序,以在将频率调制波形应用于系统接收器时测量MRI系统定时误差。通过偏移定时误差可以预期地减少在执行非笛卡尔扫描时原本会发生的相位误差,或者通过对获取的图像数据进行相位校正来追溯地偏移。

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