专利名称：Decoupling magnetic resonance RF receive
coils
发明人：Chmielewski, Thomas
申请号：EP01301836.1
优秀周记申请日：20010301
公开号：EP1130413A2
公开日：
20010905
有关阅读的诗句专利内容由知识产权出版社提供
专利附图：
健康与卫生
摘要：A magnetic resonance imaging apparatus creates images by exciting magnetic resonance in lected nuclei dispod within an image region. Through the image region a main magnetic field (B0) is applied and transver gradients are produced. At lected
times a high power RF pul is applied to the imaging region causing the lected nuclei to resonate. The magnetic resonance signals are detected by a receive coil (D1, D2) and converted into an image reprentation viewable on a display (24). Images are obtained by repeating the transmit and receive portions until enough image data is received to produce an image. The receive coil (D1, D2) includes first decoupler circuits (28) arranged about the coil. During the transmit portion of the cycle, the decoupler circuits n the high power RF pul and decouple the coil. High speed switching diodes or PIN diodes are excited by the transmit RF pul to switch inductors (40) into the coil to decouple the receive coil. During a receive portion of a cycle in which the coil is not ud, a DC bias is lectively applied to the coil forcing the diodes on, actively decoupling the coil. The DC bias also bias a diode switch (50, 50') to short the input of a preamplifier element (48, 48') providing protection.
申请人：Marconi Medical Systems, Inc.
欢乐欢乐中国年地址：595 Miner Road Highland Heights, Ohio 44143 US爱情图片带字
北京大学心理学系国籍：US
幼儿家庭教育代理机构：Waters, Jeffrey
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