公开(公告)号：US07680524B2

公开(公告)日：2010-03-16

申请号：US10277022

申请日：2002-10-21

申请人： Junichi Ogawa ,  Yoshihiro Minamiya ,  Yoshihisa Katayose ,  Reijiro Saito ,  Shuichi Kamada ,  Tomoaki Ueda

发明人： Junichi Ogawa ,  Yoshihiro Minamiya ,  Yoshihisa Katayose ,  Reijiro Saito ,  Shuichi Kamada ,  Tomoaki Ueda

IPC分类号： A61B5/05 ,  G01R33/02

CPC分类号： A61B5/415 ,  A61B5/04005 ,  A61B5/05 ,  A61B5/418 ,  G01R33/281

摘要： The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current magnetic field, and a plurality of magnetic field detection devices which are disposed in proximity to each other to measure the magnetic field component that is perpendicular to the exciting magnetic field. A magnetic fluid that possesses paramagnetism is injected from the outside into a substance in which a fluid can flow, and the local magnetic field gradient is then measured while the injected magnetic fluid is excited by the application of a direct-current or alternating-current magnetic field from the outside, thus measuring the presence or absence of distortion of the local magnetic field distribution arising from the fact that the specific magnetic permeability of the magnetic fluid injected into the substance is higher than that of the surrounding substance, so that sites where large amount of the magnetic fluid has accumulated are identified in a non-invasive manner without being affected by external magnetic noise.

摘要翻译： 本发明的装置包括：利用局部直流或交流磁场激发测量部位的励磁装置，和彼此靠近设置的多个磁场检测装置，以测量磁场 垂直于励磁磁场的分量。 具有顺磁性的磁性流体从外部注入到流体可以流动的物质中，然后在注入的磁性流体通过施加直流或交流磁体而被激发的同时测量局部磁场梯度 从而测量局部磁场分布的失真的存在或不存在，这是由于注入物质的磁性流体的比导磁率高于周围物质的比导磁率，因此大的位置 以非侵入性的方式识别积累的磁性液体的量，而不受外部磁性噪声的影响。