公开(公告)号：US08717021B2

公开(公告)日：2014-05-06

申请号：US12677097

申请日：2008-09-08

申请人： Paul A. Bottomley ,  John P. Stralka

发明人： Paul A. Bottomley ,  John P. Stralka

IPC分类号： G01V3/00

CPC分类号： G01R33/288 ,  G01R33/58

摘要： Featured is a dosimeter device that measures SAR deposited by RF power deposition during MRI of a specimen. Such a dosimeter device includes a transducer that is configured to present a load to the MRI scanner in which the transducer is located and to provide an output representative of signals induced in the transducer. The transducer also is configured so that the presented load is substantially equivalent to another load which would be presented by the specimen during MRI of the specimen. Such a transducer also is configured so as to generate an MRI signal that is sufficient to allow the MRI scanner to adjust the RF power to a value substantially equal to that of the specimen. Also featured are methods for measuring SAR deposited by RF power deposition and apparatuses or system embodying such a dosimeter device.

摘要翻译： 特色是一种剂量计装置，可以在样品的MRI期间测量通过RF功率沉积沉积的SAR。 这样一种剂量计装置包括一个换能器，该换能器被配置为向换能器所在的MRI扫描器提供负载，并提供代表在换能器中感应的信号的输出。 传感器还被配置成使得所呈现的负载基本上等于在样本的MRI期间由样本呈现的另一负载。 这样的换能器也被配置为产生足以使MRI扫描器将RF功率调整到基本上等于样本的值的MRI信号。 还有一些用于测量通过RF功率沉积沉积的SAR的方法以及体现这种剂量计装置的装置或系统。