公开(公告)号：US07663368B2

公开(公告)日：2010-02-16

申请号：US12018333

申请日：2008-01-23

申请人： Razvan Lazar ,  Wolfgang Renz ,  Thorsten Speckner

发明人： Razvan Lazar ,  Wolfgang Renz ,  Thorsten Speckner

IPC分类号： G01V3/00

CPC分类号： G01R33/341 ,  G01R33/3415 ,  G01R33/5659

摘要： An arrangement for radiation of a radio-frequency field into an examination subject has a local coil unit with a housing. An insulating dielectric material is embodied at least at one part of the housing in order to passively compensate an inhomogeneity of the B1 field that occurs in the examination subject. An adjustment arrangement allows for fixed but detachable provision of the insulating dielectric material at the housing part.

摘要翻译： 用于将射频场辐射到检查对象中的布置具有带壳体的局部线圈单元。 绝缘介电材料至少体现在壳体的一部分上，以便被动地补偿在检查对象中发生的B1场的不均匀性。 调节装置允许绝缘电介质材料在壳体部分固定但可拆卸地设置。

公开(公告)号：US07492156B2

公开(公告)日：2009-02-17

申请号：US11095159

申请日：2005-03-31

申请人： Yvonne Candidus ,  Thorsten Feiweier ,  Wilhelm Horger ,  Jürgen Huber ,  Razvan Lazar ,  Melanie Schmitt ,  Lothar Schön

发明人： Yvonne Candidus ,  Thorsten Feiweier ,  Wilhelm Horger ,  Jürgen Huber ,  Razvan Lazar ,  Melanie Schmitt ,  Lothar Schön

IPC分类号： G01V3/00 ,  A61B5/00

CPC分类号： G01R33/28 ,  G01R33/34 ,  G01R33/5659 ,  Y10T29/49

摘要： A dielectric element is formed of a dielectric material exhibiting a magnetic resonance relaxation time, with a relaxation agent incorporated in the dielectric material that reduces the relaxation time of the dielectric material. The dielectric element is adapted for placement on a subject while magnetic resonance data are acquired from the subject, and locally influences the B1 field distribution in the subject during the acquisition of magnetic resonance data.

公开(公告)号：US20050231203A1

公开(公告)日：2005-10-20

申请号：US11084421

申请日：2005-03-18

申请人： Thorsten Feiweier ,  Razvan Lazar

发明人： Thorsten Feiweier ,  Razvan Lazar

IPC分类号： G01R33/32 ,  G01R33/34 ,  G01R33/3415 ,  G01V3/00

CPC分类号： G01R33/5659 ,  G01R33/246 ,  G01R33/3415

摘要： In a method and magnetic resonance system for homogenization of the B1 field for a magnetic resonance data acquisition with a number of iteration steps. An iteration step includes the following sub-steps: Measurement data are acquired that represent a B1 field distribution in at least one part of the examination volume of the magnetic resonance system. A B1 homogeneity analysis based on the acquired measurement data is automatically implemented. A specific homogenization action is automatically selected from among a number of possible homogenization actions based on the B1 homogeneity analysis, or the iterative homogenization method is ended if the diagnosed homogeneity is sufficient for an intended magnetic resonance measurement. The selected homogenization action is implemented.

摘要翻译： 在用于使多个迭代步骤进行磁共振数据采集的B SUB场的均匀化的方法和磁共振系统中。 迭代步骤包括以下子步骤：在磁共振系统的检查体积的至少一部分中获取表示B 1 SUB场分布的测量数据。 基于所获取的测量数据的B 1同质性分析被自动实现。 基于B 1均质性分析，可以从许多可能的均匀化动作中自动选择特定的均质化作用，或者如果诊断的均匀性对于预期的磁共振测量是足够的，则迭代均匀化方法结束。 实施所选择的均质化动作。