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System and method for reducing radio frequency peak voltage and power requirements in magnetic resonance imaging using time-shifted multiband radio frequency pulses
System and method for reducing radio frequency peak voltage and power requirements in magnetic resonance imaging using time-shifted multiband radio frequency pulses
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机译:使用时移多频带射频脉冲降低磁共振成像中射频峰值电压和功率要求的系统和方法
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摘要
A system and method for producing images depicting a plurality of slice locations in a subject using a magnetic resonance imaging (“MRI”} system is provided. In particular, the system and method utilize time-shifted multiband radio frequency (“RF”} pulses to lower peak voltage and peak power requirements when using conventional multiband RF pulses. A time-shifted multiband RF pulse includes at least two component RF pulses, which may be single-band or multiband pulses. The component RF pulses are designed such that they do not have temporal footprints that completely overlap; although, they may have temporal foot-prints that partially overlap or do not overlap at all. The MRI system is used to acquire magnetic resonance signals formed in response to a time-shifted multiband RF pulse and, from these acquired signals, images depicting each of the plurality of slice locations in the subject are reconstructed.
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