公开(公告)号：EP3380856A1

公开(公告)日：2018-10-03

申请号：EP16816177.6

申请日：2016-11-21

申请人： Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

发明人： ANDERS, Jens ,  LIPS, Klaus ,  ORTMANNS, Maurits

IPC分类号： G01R33/36 ,  G01R33/60 ,  G01N24/10

CPC分类号： G01R33/3607 ,  G01N24/10 ,  G01R33/60

摘要： The invention relates to a device for generating and detecting a magnetization of a sample (103). The device at least comprises means (101) for providing a static magnetic field (102) of a predetermined direction and with a predetermined intensity at a sample location, a transmission device (104) for providing an additional magnetic field at the sample location and a receiving device (104) for detecting the magnetization of the sample (103). According to the invention, an assembly of at least two LC oscillators (104), the oscillation frequency of which being dependent on the value of an inductive element of the LC oscillators and which are frequency-synchronized by interconnection, can be used both as a transmission device (104) and as a receiving device (104) and also simultaneously as a transceiver (104). Means are connected for controlling the assembly (104), the assembly and control means (104) being sufficient to generate a magnetic field which is capable of deflecting a magnetization of the sample (103) out of equilibrium, and the sample location is situated in the near field of the assembly (104). In order to process an output voltage (105) of the assembly (104), demodulation means (106), analog to digital converters and means for digital data processing (107) are connected downstream of the device in a predetermined order. Provided on the means for digital data processing (107) are: means for determining the magnetization of the sample and the spin concentration of individual spectral components to be determined from said magnetization; and means for outputting said magnetization.

公开(公告)号：EP3266500A1

公开(公告)日：2018-01-10

申请号：EP17000760.3

申请日：2014-03-14

申请人： ViewRay Technologies, Inc.

发明人： Dempsey, James, F. ,  Shvartsman, Shmaryu, M.

IPC分类号： A61N5/10 ,  G01R33/48

CPC分类号： A61N5/1049 ,  A61N2005/1055 ,  A61N2005/1094 ,  G01R33/3607 ,  G01R33/3806 ,  G01R33/421 ,  G01R33/422 ,  G01R33/4808 ,  Y10T29/49018

摘要： Systems and methods for the delivery of linear accelerator radiotherapy in conjunction with magnetic resonance imaging in which components of a linear accelerator may be placed in shielding containers around a gantry, may be connected with RF waveguides, and may employ various systems and methods for magnetic and radio frequency shielding.

摘要翻译： 用于直线加速器放射治疗以及其中线性加速器的部件可以放置在机架周围的屏蔽容器中的磁共振成像的系统和方法可以与RF波导连接，并且可以采用各种系统和方法用于磁性和 射频屏蔽。

公开(公告)号：EP2529257A4

公开(公告)日：2017-08-02

申请号：EP11737685

申请日：2011-01-28

申请人： MILLER R A IND INC

发明人： APOSTOLOS JOHN T ,  ZANK PAUL A

IPC分类号： G01V3/00 ,  G01N24/08 ,  G01R33/44 ,  G01V3/14

CPC分类号： G01V3/14 ,  G01N24/084 ,  G01N24/085 ,  G01R33/34061 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/3621 ,  G01R33/3692 ,  G01R33/441

摘要： A transmission line array is used for explosive/contraband detection using nuclear quadrupole resonance in which the array is driven in-phase with synchrony frequency-swept signals. Each of the balanced transmission lines is fed with a low power swept frequency source and stimulated emissions are picked out with a directional coupler. Location is provided using a cross grid array or a phase detector is used for each balanced line, with phase determining the distance to the sensed substance.

摘要翻译： 传输线阵列用于使用核四极共振的爆炸物/违禁品检测，其中阵列被同步扫频信号同相驱动。 每条平衡传输线都有一个低功率扫描频率源，并通过一个定向耦合器挑选出受激发射。 位置使用交叉网格阵列提供，或者相位检测器用于每条平衡线，相位确定与感测物质的距离。

公开(公告)号：EP2968977B1

公开(公告)日：2017-05-03

申请号：EP14717949

申请日：2014-03-14

申请人： VIEWRAY TECH INC

发明人： DEMPSEY JAMES F ,  SHVARTSMAN SHMARYU M

IPC分类号： G01R33/38 ,  A61N5/10 ,  G01R33/422 ,  G01R33/48

CPC分类号： A61N5/1049 ,  A61N2005/1055 ,  A61N2005/1094 ,  G01R33/3607 ,  G01R33/3806 ,  G01R33/421 ,  G01R33/422 ,  G01R33/4808 ,  Y10T29/49018

公开(公告)号：EP2977778A1

公开(公告)日：2016-01-27

申请号：EP15177827.1

申请日：2015-07-22

申请人： JEOL Ltd.

发明人： HACHITANI, Kenichi ,  IZUMI, Kenya ,  TSUKADA, Takeshi

IPC分类号： G01R33/36

CPC分类号： G01R33/543 ,  G01R33/3607

摘要： In a magnetic resonance measurement apparatus such as an NMR measurement apparatus, a plurality of transmission signals are combined to generate a digital combined signal. The digital combined signal is converted into an analog combined signal by a D/A converter (48). The signal includes, for example, a first pulse (124) of a rectangular shape and a second pulse (130) of a mountain shape. During measurement, an operation of a dynamic variable attenuator (52) is changed immediately after the first pulse. With this process, the second pulse is suppressed, and a suppressed second pulse is generated. With this structure, the amplitudes of the pulses can be dynamically varied after the plurality of transmission signals are combined.

摘要翻译： 在诸如NMR测量设备的磁共振测量设备中，多个传输信号被组合以产生数字组合信号。 数字组合信号由D / A转换器（48）转换成模拟组合信号。 该信号例如包括矩形形状的第一脉冲（124）和山形的第二脉冲（130）。 在测量期间，动态可变衰减器（52）的操作在第一个脉冲之后立即改变。 通过该处理，第二脉冲被抑制，并且生成抑制的第二脉冲。 利用这种结构，可以在多个传输信号被组合之后动态地改变脉冲的幅度。

公开(公告)号：EP2531870A2

公开(公告)日：2012-12-12

申请号：EP11766296.5

申请日：2011-01-28

申请人： R.A. Miller Industries, Inc.

发明人： APOSTOLOS, John, T. ,  ZANK, Paul, A.

IPC分类号： G01R33/20

CPC分类号： G01R33/441 ,  G01R33/3607 ,  G01R33/3621

摘要： Rather than using balanced transmission lines the stimulated response due to nuclear quadrupole resonance can be detected using a single monopole, with multiple monopoles improving substance detection.

公开(公告)号：EP2515132A1

公开(公告)日：2012-10-24

申请号：EP11163612.2

申请日：2011-04-22

申请人： Eidgenössische Technische Hochschule (ETH) ,  Universität Zürich

发明人： The designation of the inventor has not yet been filed

IPC分类号： G01R33/24 ,  G01R33/36 ,  G01R33/28

CPC分类号： G01R33/3607 ,  G01R33/24 ,  G01R33/243 ,  G01R33/246 ,  G01R33/281 ,  G01R33/3657 ,  G01R33/58

摘要： A dynamic field camera arrangement for monitoring electromagnetic field behavior in a spatial region comprises a main magnetic field and a radiofrequency (RF) field limited to a first RF band, particularly in an MRI or NMR apparatus. The arrangement comprises a magnetic field detector set comprising a plurality of low-frequency magnetic field detectors, each one of said magnetic field detectors comprising a magnetic resonance (MR) active substance, means for pulsed MR excitation of said substance and means for receiving an MR signal generated by said substance, wherein said pulsed excitation and said MR detector signal is in a second RF band that does not overlap said first RF band. The MR signal receiving means comprise a first RF filter for suppressing RF signal from said first RF band.

摘要翻译： 用于监测空间区域中的电磁场行为的动态场照相机装置包括主要磁场和限于第一RF频带的射频（RF）场，特别是在MRI或NMR装置中。 该装置包括包括多个低频磁场检测器的磁场检测器组，每个所述磁场检测器包括磁共振（MR）活性物质，用于所述物质的脉冲MR激发的装置和用于接收MR的装置 由所述物质产生的信号，其中所述脉冲激励和所述MR检测器信号处于不与所述第一RF频带重叠的第二RF频带。 MR信号接收装置包括用于抑制来自所述第一RF频带的RF信号的第一RF滤波器。

公开(公告)号：EP2147329A1

公开(公告)日：2010-01-27

申请号：EP08757081.8

申请日：2008-05-02

申请人： National Research Council of Canada

发明人： SHARP, Jonathan ,  KING, Scott

IPC分类号： G01R33/54 ,  G01R33/32

CPC分类号： G01R33/4831 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/4833

摘要： Herein a method for slice selection is provided in an MRI process, the method involves controlling a transmit array by adding low flip angle RF pulses interspersed between refocusing pulses that are used to move a k-space weighting function with respect to one or more B l fields used to deposit energy according to a desired k-space weighting function. The low flip angle pulses deposit energy so that an envelope traced by the low flip angle pulses in the k-space weighting function is related to a desired spatially excited region of the sample volume, for example by a Fourier transform, if the phase encoding directions are linear axes that coordinatize the sample volume, and the B l fields have linear phase gradients.

摘要翻译： 这里，在MRI处理中提供了切片选择的方法，该方法包括通过将用于相对于一个或多个B 1移动k空间加权函数的重聚焦脉冲之间的散布的低翻转角RF脉冲相加来控制发射阵列 用于根据期望的k空间加权函数来存储能量的场。 低翻转角脉冲沉积能量，使得通过k空间加权函数中的低翻转角脉冲跟踪的包络与样本体积的期望的空间激发区域有关，例如通过傅立叶变换，如果相位编码方向 是使样本体积协调的线性轴，B 1场具有线性相位梯度。

公开(公告)号：EP2147326A1

公开(公告)日：2010-01-27

申请号：EP08737708.1

申请日：2008-04-03

申请人： Koninklijke Philips Electronics N.V. ,  Philips Intellectual Property & Standards GmbH

发明人： GRAESSLIN, Ingmar ,  VERNICKEL, Peter ,  DEN BOEF, Johannes, H.

IPC分类号： G01R33/36

CPC分类号： G01R33/3607

摘要： A method and an RF transmit system for generating RF transmit signals for feeding an RF transmitter (14) in the form of, or comprising, one or more antenna device(s), coil(s), coil elements, or coil array(s) is disclosed. Furthermore, a multi-channel RF transmit system for feeding a plurality of such RF transmitters, especially for use as an RF excitation system in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR) is disclosed. A demand RF transmit signal is compared in the digital domain with an RF transmit signal and digitally corrected with respect to differences or errors between both by means of a complex predistorter (11), an adaption unit (17) and a look-up table unit (18).

公开(公告)号：EP1877815A2

公开(公告)日：2008-01-16

申请号：EP06728022.2

申请日：2006-04-24

申请人： Koninklijke Philips Electronics N.V. ,  Philips Intellectual Property & Standards GmbH

发明人： LEUSSLER, Christoph ,  VERNICKEL, Peter ,  GRAESSLIN, Ingmar

IPC分类号： G01R33/36

CPC分类号： G01R33/3607 ,  G01R33/288 ,  G01R33/5612 ,  G01R33/5659

摘要： Methods and circuit arrangements for operating a multi-channel transmit / receive antenna device or arrangement, especially for use in a magnetic resonance imaging (MRI) system, are disclosed by which RF amplifiers can be used to their full peak power capability without running the risk that the RF amplifier is damaged due to excessive reflected power at its output. Furthermore by evaluating certain forward and reflected power signals patient safety is achieved with respect to monitoring the limits of the specific absorption rate.