公开(公告)号：US07723988B2

公开(公告)日：2010-05-25

申请号：US11882150

申请日：2007-07-31

申请人： Arthur Schwilch ,  Daniel Marek ,  Nicolas Freytag

发明人： Arthur Schwilch ,  Daniel Marek ,  Nicolas Freytag

IPC分类号： G01V3/00

CPC分类号： G01R33/3671 ,  G01R33/34023 ,  G01R33/3621

摘要： A magnetic resonance (MR) detection configuration comprising at least one RF resonant circuit with an inductance, a preamplifier module and an RF receiver, wherein a reactive transformation circuit is connected between a high-impedance point of the inductance and a low-impedance connecting point of the RF resonant circuit, which acts as an impedance transformer and wherein the low-impedance connecting point is connected to the preamplifier module via an RF line having a characteristic impedance, is characterized in that at least one passive damping impedance is provided in the preamplifier module downstream of the RF line, wherein the passive damping impedance can be connected to the resonant circuit by a switching means during a damping and/or transmitting process, and wherein the respective amount of the complex reflection factor of passive damping impedance relative to the characteristic impedance of the RF line exceeds a value of 0.5. This presents an MR detection configuration with an extensive damping concept, wherein all three processes (transmitting, damping and receiving processes) are optimized.

摘要翻译： 一种磁共振（MR）检测配置，其包括至少一个具有电感的RF谐振电路，前置放大器模块和RF接收器，其中无功变换电路连接在电感的高阻点与低阻抗连接点 的RF谐振电路，其作为阻抗变换器，并且其中低阻抗连接点经由具有特征阻抗的RF线连接到前置放大器模块，其特征在于，在前置放大器中提供至少一个被动阻尼阻抗 在所述RF线路的下游模块，其中所述无源阻尼阻抗可以在阻尼和/或发射过程期间通过开关装置连接到所述谐振电路，并且其中相对于所述特性的无源阻尼阻抗的复反射系数的相应量 RF线的阻抗超过0.5。 这提出了具有广泛的阻尼概念的MR检测配置，其中所有三个过程（发射，阻尼和接收过程）被优化。

公开(公告)号：US20080061783A1

公开(公告)日：2008-03-13

申请号：US11882150

申请日：2007-07-31

申请人： Arthur Schwilch ,  Daniel Marek ,  Nicolas Freytag

发明人： Arthur Schwilch ,  Daniel Marek ,  Nicolas Freytag

IPC分类号： G01V3/00

CPC分类号： G01R33/3671 ,  G01R33/34023 ,  G01R33/3621

摘要： A magnetic resonance (MR) detection configuration comprising at least one RF resonant circuit (1) with an inductance (L), a preamplifier module (2) and an RF receiver (7), wherein a reactive transformation circuit is connected between a high-impedance point (M) of the inductance (L) and a low-impedance connecting point (A) of the RF resonant circuit (1), which acts as an impedance transformer and wherein the low-impedance connecting point (A) is connected to the preamplifier module (2) via an RF line (15) having a characteristic impedance RW), is characterized in that at least one passive damping impedance (ZDV, ZSV, ZDV′, ZSV′) is provided in the preamplifier module (2) downstream of the RF line (15), wherein the passive damping impedance (ZDV, ZSV, ZDV′, ZSV′) can be connected to the resonant circuit (1) by a switching means during a damping and/or transmitting process, and wherein the respective amount of the complex reflection factor of passive damping impedance (ZDV, ZSV, ZDV′, ZSV′) relative to the characteristic impedance RW) of the RF line (15) exceeds a value of 0.5. This presents an MR detection configuration with an extensive damping concept, wherein all three processes (transmitting, damping and receiving processes) are optimized.

摘要翻译： 一种包括具有电感（L）的至少一个RF谐振电路（1），前置放大器模块（2）和RF接收器（7））的磁共振（MR）检测配置，其中， 作为阻抗变换器的RF谐振电路（1）的电感（L）的阻抗点（M）和低阻抗连接点（A），其中低阻抗连接点（A）连接到 前置放大器模块（2）经由具有特征阻抗R W W的RF线路（15））的特征在于，至少一个被动阻尼阻抗（Z Z DV，Z 在RF线路（15）的下游的前置放大器模块（2）中提供有SV SV，Z SV，Z SV， 可以连接被动阻尼阻抗（Z DV DV>，>>>，，Z Z Z，，，，，，connected connected connected connected connected connected connected connected connected connected connected>>>>>>>>>>>>>>>>> 在阻尼和/或发送过程中通过开关装置耦合到谐振电路（1） ，并且其中无源阻尼阻抗（Z N DV，Z SV），Z V DV'，Z W>的相位> SV'<>>超过0.5的值。 这提出了具有广泛的阻尼概念的MR检测配置，其中所有三个过程（发射，阻尼和接收过程）被优化。

公开(公告)号：US20080001602A1

公开(公告)日：2008-01-03

申请号：US11679378

申请日：2007-02-27

申请人： Jeffrey Schiano ,  Daniel Swain ,  Michael Pusateri

发明人： Jeffrey Schiano ,  Daniel Swain ,  Michael Pusateri

IPC分类号： G01R33/34

CPC分类号： G01R33/441 ,  G01N24/084 ,  G01R33/34023 ,  G01R33/341 ,  G01R33/3671

摘要： Narrowband quadrupole resonance (QR) probes were developed from thin-film high-temperature superconducting (HTS) resonators. The QR probes are useful in analyte-detection systems, in particular for the detection of nitrogen-containing compounds. Embodiments of the invention provide greater than an order of magnitude improvement in sensitivity and the ability to reject RF interference sources located outside the pass-band of a superconducting QR probe. Methods and apparatus are described for analyte detection and resonance frequency adjustment.

摘要翻译： 从薄膜高温超导（HTS）谐振器开发窄带四极共振（QR）探针。 QR探针可用于分析物检测系统，特别是用于检测含氮化合物。 本发明的实施例提供的灵敏度提高大于一个数量级，以及抑制位于超导QR探头的通带之外的RF干扰源的能力。 描述了用于分析物检测和共振频率调节的方法和装置。

公开(公告)号：US11852702B2

公开(公告)日：2023-12-26

申请号：US17275605

申请日：2019-09-10

申请人： RIKEN

发明人： Masato Takahashi

IPC分类号： G01R33/36 ,  G01R33/34

CPC分类号： G01R33/3671 ,  G01R33/34092 ,  G01R33/3657

摘要： A magnetic resonance measurement apparatus according to the present invention includes a first LC circuit that forms an oscillating magnetic field that causes an object to exhibit magnetic resonance. The first LC circuit includes a parallel connection assembly including a diode. The parallel connection assembly further includes a diode connected, in parallel and in reverse direction, to the diode, or an inductor connected in parallel to the diode. In a first state in which oscillating voltage for forming the oscillating magnetic field is applied to the first LC circuit, the diode of the parallel connection assembly functions as a short-circuit such that the resonance frequency of the first LC circuit becomes a first resonance frequency. In a second state in which oscillating voltage is not applied to the first LC circuit, the diode of the parallel connection assembly functions as capacitance such that the resonance frequency of the first LC circuit becomes a second resonance frequency that is different from the first resonance frequency.

公开(公告)号：US10012710B2

公开(公告)日：2018-07-03

申请号：US14516885

申请日：2014-10-17

申请人： Siemens Aktiengesellschaft

发明人： David Grodzki ,  Bjoern Heismann

IPC分类号： G01V3/00 ,  G01R33/385 ,  G01R33/36 ,  G01R33/54 ,  G01R33/565

CPC分类号： G01R33/3852 ,  G01R33/3671 ,  G01R33/3854 ,  G01R33/543 ,  G01R33/56509

摘要： In a method to optimize a magnetic resonance sequence of a magnetic resonance apparatus and a magnetic resonance apparatus operated according to such a method, optimization of the timing of the magnetic resonance sequence is implemented by adopting a magnetic resonance sequence as a starting sequence includes a first time interval set of one or more first time intervals and a second time interval set of one or more second time intervals, wherein the first time intervals of the first time interval set are to be left unmodified with regard to an optimization of the duration. The magnetic resonance sequence is automatically analyzed to identify the first time intervals of the first time interval set and the second time intervals of the second time interval set in the magnetic resonance sequence. The duration of at least one second time interval of the second time interval set is then automatically optimized.

公开(公告)号：US20080036462A1

公开(公告)日：2008-02-14

申请号：US11679575

申请日：2007-02-27

申请人： Jeffrey Schiano

发明人： Jeffrey Schiano

IPC分类号： G01R33/3815

CPC分类号： G01R33/441 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/3628 ,  G01R33/3671

摘要： The use of a superconducting resonator with continuous-wave (CW) excitation allows low-noise quadrupole resonance (QR) detection without the need for a lock-in amplifier. This allows detection times to be greatly reduced. Hence, for the first time, a CW QR spectrometer using a superconducting resonator can be used in a portable device, such as a hand-held wand for detecting explosives.

摘要翻译： 使用具有连续波（CW）激发的超导谐振器允许低噪声四极共振（QR）检测，而不需要锁定放大器。 这样可以大大降低检测时间。 因此，首次使用超导谐振器的CW QR光谱仪可用于便携式设备中，例如用于检测爆炸物的手持式魔杖。

公开(公告)号：US07190165B2

公开(公告)日：2007-03-13

申请号：US10823273

申请日：2004-04-12

申请人： Robert B Hammond ,  Jonathan Z. Sun ,  Douglas J. Scalapino ,  Timothy W. James ,  Lincoln C. Bourne

发明人： Robert B Hammond ,  Jonathan Z. Sun ,  Douglas J. Scalapino ,  Timothy W. James ,  Lincoln C. Bourne

IPC分类号： G01V3/00

CPC分类号： H01G4/008 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671 ,  H01F6/06 ,  H01P1/203 ,  H01P7/08 ,  H01P7/088 ,  H01Q1/364 ,  H03K17/78 ,  H03K17/92 ,  H03K2217/0036

摘要： A method of tuning a high temperature superconductor (HTS) resonator includes the steps of providing a HTS inductor and a HTS capacitor, the HTS capacitor being electrically connected to the HTS inductor. A tuning body is provided adjacent to the HTS inductor and the HTS capacitor. The relative position of the tuning body with respect to the HTS inductor and the HTS capacitor is altered so as to tune the resonator. A tunable resonant circuit is provided that includes a substrate having a planar surface. At least one resonator formed from HTS material is disposed on the substrate, the resonator having one or more turns that when combined, turn through greater than 360°.

摘要翻译： 调谐高温超导体（HTS）谐振器的方法包括提供HTS电感器和HTS电容器的步骤，HTS电容器电连接到HTS电感器。 调谐体靠近HTS电感和HTS电容。 改变调谐体相对于HTS电感器和HTS电容器的相对位置，以调谐谐振器。 提供了包括具有平坦表面的基板的可调谐谐振电路。 由HTS材料形成的至少一个谐振器设置在基板上，谐振器具有一个或多个匝，当组合时，该谐振器转过大于360°。

公开(公告)号：US06538445B2

公开(公告)日：2003-03-25

申请号：US09970842

申请日：2001-10-03

申请人： Timothy W. James ,  Lincoln C. Bourne

发明人： Timothy W. James ,  Lincoln C. Bourne

IPC分类号： G01V300

CPC分类号： H01G4/008 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671 ,  H01F6/06 ,  H01P1/203 ,  H01P7/08 ,  H01P7/088 ,  H01Q1/364 ,  H03K17/78 ,  H03K17/92 ,  H03K2217/0036

摘要： Control elements for RF antennas including high temperature superconducting capacitors, alone or in combination with other elements, including high temperature superconducting films, structures, and applications are formed. In one embodiment a high temperature superconducting capacitor is coupled to an inductor to form a resonant circuit. In another embodiment a high temperature superconducting capacitor is used to make a low-resistance cross-over for an inductor coil. Additional circuits include circuits which do not use non-superconducting materials in the circuit, circuits which have coupled superconducting inductors to provide low-loss signal coupling, tuning and bandwidth broadening, and circuits which include switches to shut off the superconductivity of a superconducting element including low-loss photoconducting and superconducting thermal switches. These circuits may be used to improve Magnetic Resonance Imaging (MRI).

公开(公告)号：US20020135373A1

公开(公告)日：2002-09-26

申请号：US09970842

申请日：2001-10-03

申请人： Superconductor Technologies, Inc.

发明人： Timothy W. James ,  Lincoln C. Bourne

IPC分类号： G01V003/00

CPC分类号： H01G4/008 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671 ,  H01F6/06 ,  H01P1/203 ,  H01P7/08 ,  H01P7/088 ,  H01Q1/364 ,  H03K17/78 ,  H03K17/92 ,  H03K2217/0036

摘要： Control elements for RF antennas including high temperature superconducting capacitors, alone or in combination with other elements, including high temperature superconducting films, structures, and applications are formed. In one embodiment a high temperature superconducting capacitor is coupled to an inductor to form a resonant circuit. In another embodiment a high temperature superconducting capacitor is used to make a low-resistance cross-over for an inductor coil. Additional circuits include circuits which do not use non-superconducting materials in the circuit, circuits which have coupled superconducting inductors to provide low-loss signal coupling, tuning and bandwidth broadening, and circuits which include switches to shut off the superconductivity of a superconducting element including low-loss photoconducting and superconducting thermal switches. These circuits may be used to improve Magnetic Resonance Imaging (MRI).

摘要翻译： 形成包括高温超导电容器在内的RF天线的控制元件，单独或与其它元件组合，包括高温超导膜，结构和应用。 在一个实施例中，高温超导电容器耦合到电感器以形成谐振电路。 在另一个实施例中，使用高温超导电容器来形成用于电感线圈的低电阻交叉。 附加电路包括在电路中不使用非超导材料的电路，具有耦合超导电感器以提供低损耗信号耦合，调谐和带宽拓宽的电路，以及包括用于切断超导元件的超导性的开关的电路，包括 低损耗光导和超导热敏开关。 这些电路可用于改善磁共振成像（MRI）。

公开(公告)号：US06335622B1

公开(公告)日：2002-01-01

申请号：US07934921

申请日：1992-08-25

申请人： Timothy W. James ,  Lincoln C. Bourne

发明人： Timothy W. James ,  Lincoln C. Bourne

IPC分类号： G01V300

CPC分类号： H01G4/008 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671 ,  H01F6/06 ,  H01P1/203 ,  H01P7/08 ,  H01P7/088 ,  H01Q1/364 ,  H03K17/78 ,  H03K17/92 ,  H03K2217/0036

摘要： Control elements for RF antennas including high temperature superconducting capacitors, alone or in combination with other elements, including high temperature superconducting films, structures, and applications are formed. In one embodiment a high temperature superconducting capacitor is coupled to an inductor to form a resonant circuit. In another embodiment a high temperature superconducting capacitor is used to make a low-resistance cross-over for an inductor coil. Additional circuits include circuits which do not use non-superconducting materials in the circuit, circuits which have coupled superconducting inductors to provide low-loss signal coupling, tuning and bandwidth broadening, and circuits which include switches to shut off the superconductivity of a superconducting element including low-loss photoconducting and superconducting thermal switches. These circuits may be used to improve Magnetic Resonance Imaging (MRI).