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    Magnetic resonance imaging contrast system
    1.
    发明授权
    Magnetic resonance imaging contrast system 失效
    磁共振成像对比系统

    公开(公告)号：US06924150B1

    公开(公告)日：2005-08-02

    申请号：US10124203

    申请日：2002-04-17

    申请人： Xiao Dong Xiang ,  Gerald F. Dionne ,  Haitao Yang

    发明人： Xiao Dong Xiang ,  Gerald F. Dionne ,  Haitao Yang

    IPC分类号： G01N24/00 ,  G01N24/10 ,  A61B5/055 ,  A61B8/00 ,  G01N25/18 ,  G01R33/00 ,  G01V3/00

    CPC分类号： G01N24/10 ,  G01N24/006 ,  Y10T436/24

    摘要： A method for improving the magnetic resonance imaging contrast of a selected portion of a sample. A selected ferrimagnetic constituent is associated with the sample portion, by molecular or biological attachment or by some other means, so that the sample portion is distinguished from other adjacent portions of the sample that do not have the selected ferrimagnetic constituent associated therewith. Alternatively, the sample portion is suspected, but not yet confirmed, to have the selected ferrimagnetic constituent associated with it. Ferromagnetic resonance imaging is performed on the sample portion, and at least one resonance frequency ω0 of the sample portion is provided. At least one material parameter of the sample portion is measured at or near the frequency ω0, with enhanced imaging contrast relative to adjacent portions of the sample that do not have the selected ferrimagnetic constituent in association. Alternatively, the measured value is compared with a corresponding reference value for the selected ferrimagnetic constituent. If (and only if) the measured and corresponding reference values substantially agree, the selected ferrimagnetic constituent is present in association with the selected sample portion. Other parameters of the selected ferrimagnetic consituent can also be measured.

    摘要翻译： 一种用于改善所选部分样品的磁共振成像对比度的方法。 选择的亚铁磁性成分通过分子或生物附着或通过某种其他方式与样品部分相关联，使得样品部分与样品中没有与其相关联的选择的亚铁磁性成分的其它相邻部分区分开。 或者，怀疑但尚未确认样品部分具有与其相关联的所选择的亚铁磁性成分。 对样品部分进行铁磁共振成像，并且提供样品部分的至少一个共振频率ω0。 样品部分的至少一个材料参数在频率ω0处或附近被测量，相对于没有关联的选择的亚铁磁性成分的样品的相邻部分，具有增强的成像对比度。 或者，将测量值与所选择的亚铁磁性成分的相应参考值进行比较。 如果（且仅当）测量的和相应的参考值基本一致，则所选择的亚铁磁成分与选择的样品部分相关联地存在。 也可以测量所选铁氧体成分的其它参数。

    Spatially resolved spin resonance detection
    2.
    发明授权
    Spatially resolved spin resonance detection 有权
    空间分辨的自旋共振检测

    公开(公告)号：US06693426B1

    公开(公告)日：2004-02-17

    申请号：US10071563

    申请日：2002-02-09

    申请人： Xiao Dong Xiang ,  Gang Wang ,  Haitao Yang ,  Gerald F. Dionne

    发明人： Xiao Dong Xiang ,  Gang Wang ,  Haitao Yang ,  Gerald F. Dionne

    IPC分类号： G01V300

    CPC分类号： G01N24/10 ,  G01N24/006 ,  Y10T436/24

    摘要： Methods for spatially resolve spin resonance detection in a sample of material, with a resolution as small as 0.5 &mgr;m-1 mm. In one embodiment, a coupler having at least one pair of degenerate orthogonal modes provides an evanescent input signal along one coupler axis to the sample, to which a magnetic field is applied, and senses a spin interaction signal along another coupler axis. In another embodiment, an evanescent input signal is applied to the sample along one of two identical transmission line resonators, and a difference of the two resonator signals provides a spin interaction signal. In another embodiment, a polarized laser beam provides an evanescent input signal to the sample, and the spin interaction signal is sensed according to a second beam polarization direction. Certain ferromagnetic or ferrimagnetic molecules, such as YIG, can be used to tag selected chemical and biological molecules, using spatially resolved spin resonance detection for interrogation.

    摘要翻译： 在材料样品中空间分辨自旋共振检测的方法，分辨率小至0.5 mum-1 mm。 在一个实施例中，具有至少一对简并正交模式的耦合器提供沿着一个耦合器轴线向被施加磁场的样本的消逝输入信号，并且沿另一个耦合器轴线感测自旋相互作用信号。 在另一个实施例中，沿着两个相同的传输线谐振器中的一个将消逝的输入信号施加到样本，并且两个谐振器信号的差提供自旋相互作用信号。 在另一个实施例中，偏振激光束向样本提供消逝的输入信号，并且根据第二光束偏振方向感测自旋相互作用信号。 某些铁磁或亚铁磁分子，如YIG，可用于标记选定的化学和生物分子，使用空间分辨的自旋共振检测进行询问。

    Tunable microwave magnetic devices
    4.
    发明授权
    Tunable microwave magnetic devices 失效
    可调谐微波磁性器件

    公开(公告)号：US06919783B2

    公开(公告)日：2005-07-19

    申请号：US10131338

    申请日：2002-04-23

    申请人： Gerald F. Dionne ,  Daniel E. Oates

    发明人： Gerald F. Dionne ,  Daniel E. Oates

    IPC分类号： H01P1/215 ,  H01P1/20

    CPC分类号： H01P1/215

    摘要： A device responsive to an electromagnetic signal includes a conductor for conducting the electromagnetic signal, a magnetic structure disposed proximate the conductor to enable gyromagnetic interaction between the electromagnetic signal and the magnetic structure and a transducer disposed on the magnetic structure for controlling a domain pattern in the magnetic structure.

    摘要翻译： 响应于电磁信号的装置包括用于传导电磁信号的导体，靠近导体设置的磁性结构，以使电磁信号与磁性结构之间能够进行回旋磁性相互作用，以及设置在磁性结构上的换能器，用于控制电磁信号中的磁畴图案 磁结构。

    Tunable resonators
    6.
    发明授权
    Tunable resonators 失效
    可调谐谐振器

    公开(公告)号：US5949311A

    公开(公告)日：1999-09-07

    申请号：US18154

    申请日：1998-02-03

    申请人： Jerald A. Weiss ,  Donald H. Temme ,  Gerald F. Dionne

    发明人： Jerald A. Weiss ,  Donald H. Temme ,  Gerald F. Dionne

    IPC分类号： H01P1/215 ,  H01P1/20 ,  H01P1/217

    CPC分类号： H01P1/215

    摘要： In a magnetically-tunable resonator, a wave-guiding structure comprising an electromagnetic frequency filter, or component of such a filter, is placed in sufficient proximity with a magnetic structure so as to be gyromagnetically coupled therewith. The resonator is supportable of two fundamental normal modes of propagation which, in the absence of magnetic interaction are even and odd with respect to the resonator center plane of symmetry. Each normal mode possesses a spectrum of resonance frequencies. When the magnetic structure is magnetized, the formerly even and odd modes become mixed due to gyromagnetic interaction, and the resulting wave fields become elliptically polarized. With appropriate design such that the identities of the modes are preserved under conditions of resonance, this in turn results in a nonreciprocal reinforcement action in the resonator, which leads to the desired shift in resonance frequency in at least one of the two normal modes. The device is especially attractive to application in miniaturized planar microwave devices, for example MMICs, in conferring small size and weight, simplicity of structure, low power required for tuning, capability of fixed, continuous or digitally-stepped frequencies, and low-loss high-Q performance; applicable with superconducting or conventional metallic conductors.

    摘要翻译： 在磁可调谐谐振器中，包括电磁频率滤波器或这种滤波器的分量的波导结构被放置成与磁性结构足够接近以便与其进行回转磁耦合。 谐振器可支持两种基本正常传播模式，在不存在磁相互作用的情况下，相对于谐振器中心对称平面是偶数和奇数。 每个正常模式都有一个共振频率谱。 当磁结构被磁化时，由于陀螺磁相互作用，原来的偶模和奇模变得混合，并且所得到的波场变成椭圆极化。 通过适当的设计使得在共振条件下保持模式的标识，这又导致谐振器中的不可逆加强作用，这导致在两种正常模式中的至少一种中共振频率的期望偏移。 该器件特别适用于小型化平面微波器件（例如MMIC），具有小尺寸和重量，结构简单，调谐所需的低功耗，固定，连续或数字阶跃频率的能力以及低损耗高 -Q表现; 适用于超导或常规金属导体。

    MAGNETIC MATERIAL FOR MAGNETO-OPTICAL ISOLATOR
    7.
    发明申请
    MAGNETIC MATERIAL FOR MAGNETO-OPTICAL ISOLATOR 有权
    磁光隔离器用磁性材料

    公开(公告)号：US20090136191A1

    公开(公告)日：2009-05-28

    申请号：US12262739

    申请日：2008-10-31

    申请人： Lei Bi ,  Gerald F. Dionne ,  Hyun Suk Kim ,  Caroline A. Ross

    发明人： Lei Bi ,  Gerald F. Dionne ,  Hyun Suk Kim ,  Caroline A. Ross

    IPC分类号： G02B6/036 ,  G02B6/10

    CPC分类号： G02F1/0955 ,  G02F1/0036 ,  G02F2001/212 ,  H01F10/1933

    摘要： A magneto-optical structure is provided. The magneto-optical structure includes a substrate. A waveguide layer is formed on the substrate for guiding electromagnetic radiation received by the magneto-optical structure. The waveguide layer includes magnetic oxide material that comprises ABO3 perovskite doped with transition metal ions on the B site, or transition metal ions doped SnO2, or transition metal ions doped CeO2.

    摘要翻译： 提供磁光结构。 磁光结构包括基板。 在衬底上形成用于引导由磁光结构接收的电磁辐射的波导层。 波导层包括包含在B位上掺杂过渡金属离子的ABO 3钙钛矿或掺杂过渡金属离子的掺杂CeO 2的过渡金属离子的磁性氧化物材料。

    Ferrite/superconductor microwave device
    9.
    发明授权
    Ferrite/superconductor microwave device 失效
    铁氧体/超导体微波器件

    公开(公告)号：US5484765A

    公开(公告)日：1996-01-16

    申请号：US192174

    申请日：1994-02-04

    申请人： Gerald F. Dionne ,  Daniel E. Oates

    发明人： Gerald F. Dionne ,  Daniel E. Oates

    IPC分类号： H01P1/19

    CPC分类号： H01P1/19 ,  Y10S505/70 ,  Y10S505/866

    摘要： An apparatus and method are described for gyromagnetic interaction between the electromagnetic field generated by an electromagnetic signal conducted by a superconductor and the magnetization contained in a magnetic structure. A ferrite magnetic structure is disposed in close proximity to a superconductor conducting the electromagnetic signal. A magnetization is induced in the magnetic structure with a geometry such that the magnetic flux is confined within the magnetic structure or eliminated from the magnetic structure so as not to produce an external magnetic field to interfere with the superconducting properties of the superconductor. The electromagnetic field of the signal conducted by the superconductor interacts gyromagnetically with the magnetization of the magnetic structure, inducing a phase shift in the electromagnetic signal traversing the superconductor. Thus, the invention induces a phase shift in the signal with minimum insertion loss due to electrical resistance.

    摘要翻译： 描述了由超导体传导的电磁信号产生的电磁场与包含在磁性结构中的磁化之间的回旋磁相互作用的装置和方法。 铁氧体磁结构设置在接近传导电磁信号的超导体上。 在磁结构中引起磁化，其几何形状使得磁通量被限制在磁结构内或从磁结构中消除，以便不产生外部磁场以干扰超导体的超导特性。 由超导体传导的信号的电磁场与磁结构的磁化相互作用，引起穿过超导体的电磁信号的相移。 因此，本发明由于电阻而以最小的插入损耗引起信号中的相移。

    Passive magnetic field sensors having magnetostrictive and piezoelectric materials
    10.
    发明授权
    Passive magnetic field sensors having magnetostrictive and piezoelectric materials 失效
    具有磁致伸缩和压电材料的被动磁场传感器

    公开(公告)号：US06809516B1

    公开(公告)日：2004-10-26

    申请号：US09542346

    申请日：2000-04-05

    申请人： Yi-Qun Li ,  Robert C. O'Handley ,  Gerald F. Dionne ,  Chun Zhang

    发明人： Yi-Qun Li ,  Robert C. O'Handley ,  Gerald F. Dionne ,  Chun Zhang

    IPC分类号： G01R3300

    CPC分类号： G01R33/18 ,  G01R15/20 ,  G01R33/02

    摘要： Passive solid-state magnetic sensors comprise a magnetostrictive material in contact with a piezoelectric material. The magnetostrictive material strains under the influence of an external magnetic field and imparts stress to the piezoelectric material to produce a detectable voltage signal indicative of the external field. Sensors have applications in rotor speed detection, electrical current measurements, magnetic imaging, magnetic field detection, read heads, and MRAM, for example.

    摘要翻译： 被动固态磁传感器包括与压电材料接触的磁致伸缩材料。 磁致伸缩材料在外部磁场的影响下变形，并向压电材料施加应力，以产生指示外部场的可检测电压信号。 传感器可用于转子速度检测，电流测量，磁性成像，磁场检测，读取头和MRAM等。