公开(公告)号：US5139024A

公开(公告)日：1992-08-18

申请号：US659643

申请日：1991-02-25

申请人： Robert G. Bryant ,  Joseph P. Hornak ,  Eric A. Marshall

发明人： Robert G. Bryant ,  Joseph P. Hornak ,  Eric A. Marshall

IPC分类号： G01R33/343

CPC分类号： G01R33/343 ,  G01R33/34007

摘要： Single-turn loop-gap solenoidal resonators for establishing RF fields (B.sub.1) transverse to the static B.sub.0 field of a magnetic resonance imaging system. Tubular forms of dielectric (plastic) material have conductive foil bands attached to their outside walls with one or more gaps between the ends of the bands and provide solenoidal single-turn coils. A circuit resonant at radio frequencies is defined by the inductance of the solenoidal coils formed by the bands and the capacitance across the gap. The resistors and/or capacitors spaced along the axis of the tubular bodies tune the circuit and provide RF magnetic field homogeneity within the structure. Holes in the sides of the forms through the bands provide for the entrance of the analytical sample or body mass of a subject (the head, shoulder, hand, foot, knee or elbow). The forms and bands are two part assemblies, each having part of the opening therein so as to facilitate the entry of the body mass to be studied into the tubular body of the resonator. A pair of canted cylindrical forms assembled together with a plate and having bands of conductive material extending around the forms and across the opposite sides of the plate define a resonator suitable for imaging of the breasts of the subject.

摘要翻译： 用于建立横向于磁共振成像系统的静态B0场的射频场（B1）的单圈环形间隙螺线管谐振器。 电介质（塑料）材料的管状形式具有连接到其外壁的导电箔带，带之间具有一个或多个间隙，并提供螺线管单匝线圈。 在射频谐振的电路由由频带形成的螺线管线圈的电感和间隙上的电容定义。 沿着管状体的轴线隔开的电阻器和/或电容器调谐电路并在结构内提供RF磁场均匀性。 通过条带在形式的两侧的孔提供了对象（头，肩，手，脚，膝盖或肘部）的分析样本或体重的入口。 形式和带是两部分组件，每个部分组件具有其中的一部分开口，以便于待研究的身体质量进入谐振器的管状体。 与板组装在一起的一对倾斜圆柱形形状，并且具有围绕形状延伸并跨过板的相对侧延伸的导电材料带限定了适合于对象的乳房成像的谐振器。

公开(公告)号：US5024229A

公开(公告)日：1991-06-18

申请号：US471663

申请日：1990-01-24

申请人： Robert G. Bryant ,  Joseph P. Hornak ,  Eric A. Marshall

发明人： Robert G. Bryant ,  Joseph P. Hornak ,  Eric A. Marshall

IPC分类号： G01R33/343

CPC分类号： G01R33/343

摘要： Single-turn loop-gap solenoidal resonators for establishing RF fields (B.sub.1) transverse to the static B.sub.0 field of a magnetic resonance imaging system. Tubular forms of dielectric (plastic) material have conductive foil bands attached to their outside walls with one or more gaps between the ends of the bands and provide solenoidal signal-turn coils. A circuit resonant at radio frequencies is defined by the inductance of the solenoidal coils formed by the bands and the capacitance across the gap. The resistors and/or capacitors spaced along the axis of the tubular bodies tune the circuit and provide RF magnetic field homogeneity within the structure. Holes in the sides of the forms through the bands provide for the entrance of the analytical sample of body mass of a subject (the head, shoulder, hand, foot, knee or elbow). The forms and bands are two part assemblies, each having part of the opening therein so as to facilitate the entry of the body mass to be studied into the tubular body of the resonator. A pair of canted cylindrical forms assembled together with a plate and having bands of conductive material extending around the forms and across the opposite sides of the plate define a resonator suitable for imaging of the breasts of the subject.

摘要翻译： 用于建立横向于磁共振成像系统的静态B0场的射频场（B1）的单圈环形间隙螺线管谐振器。 电介质（塑料）材料的管状形式具有连接到其外壁的导电箔带，带之间具有一个或多个间隙，并提供螺线管信号转线圈。 在射频谐振的电路由由频带形成的螺线管线圈的电感和间隙上的电容定义。 沿着管状体的轴线隔开的电阻器和/或电容器调谐电路并在结构内提供RF磁场均匀性。 通过条带形成两侧的孔可以提供对象（头，肩，手，脚，膝盖或肘部）的体重分析样本的入口。 形式和带是两部分组件，每个部分组件具有其中的一部分开口，以便于待研究的身体质量进入谐振器的管状体。 与板组装在一起的一对倾斜圆柱形形状，并且具有围绕形状延伸并跨过板的相对侧延伸的导电材料带限定了适合于对象的乳房成像的谐振器。