Invention Application
US20120013337A1 SAR HOTSPOT REDUCTION BY TEMPORAL AVERAGING IN PARALLEL TRANSMISSION MRI 有权
通过平行传输中的时间平均来减少SAR值

SAR HOTSPOT REDUCTION BY TEMPORAL AVERAGING IN PARALLEL TRANSMISSION MRI
Abstract:
A magnetic resonance sequence includes a repetitively applied radiofrequency B1 pulse capable of causing a specific absorption rate (SAR) hot spot. The composition of the repetitive B1 pulse is varied to generate versions of the repetitive B1 pulse such that the SAR hot spot changes locations with subsequent applications of the repetitive B1 pulse. To generate versions of the B1 pulse, a pilot scan is performed to generate a patient model. A simulation of the SAR response to each of the versions of the repetitive B1 pulse is performed to determine the location of SAR hot spot(s). A plurality of versions of the repetitive B1 pulse is selected to be used in the magnetic resonance sequence.
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