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61. 发明申请

US20080012563A1 CONTRAST PREPARED MRI INVOLVING NON-CARTESIAN TRAJECTORIES WITH OVERSAMPLING OF THE CENTER OF K-SPACE 失效
标题翻译：涉及与K-SPACE中心超滤的非卡特彼勒TRAJECTOR相关的MRI
公开(公告)号：US20080012563A1
公开(公告)日：2008-01-17
申请号：US11569071
申请日：2005-05-03
申请人： Steffen Weiss , Tobias Schaeffter
发明人： Steffen Weiss , Tobias Schaeffter
IPC分类号： G01R33/56
CPC分类号： G01R33/56 , G01R33/4824 , G01R33/561 , G01R33/5619
摘要： A method of magnetic resonance imaging is provided. The method includes the steps of applying a preparation pulse sequence to a subject (16) disposed in an examination region (14), acquiring k-space data related to a plurality of k-space trajectories through the center of k-space such as radial trajectories and reconstructing a first image form the k-space data wherein data within a region (210) around the center of k-space (205) of at least a first of the k-space trajectories is not used. Rather, data of only a limited number of views within said region is used for image reconstruction. Hence, image contrast is essentially determined by said limited number of views.
摘要翻译：提供了一种磁共振成像方法。该方法包括以下步骤：将准备脉冲序列应用于设置在检查区域（14）中的对象（16），通过k空间的中心获取与多个k空间轨迹相关的k空间数据，例如径向轨迹，并且重建第一图像，形成k空间数据，其中不使用至少k个空间轨迹中的至少第一个的k空间（205）的中心周围的区域（210）内的数据。相反，在所述区域内只有有限数量的视图的数据被用于图像重构。因此，图像对比度基本上由所述有限数量的视图来确定。

62. 发明授权

US07162293B2 MR arrangement for localizing a medical instrument 失效
标题翻译：用于本地化医疗器械的MR安排
公开(公告)号：US07162293B2
公开(公告)日：2007-01-09
申请号：US10268809
申请日：2002-10-10
申请人： Steffen Weiss
发明人： Steffen Weiss
IPC分类号： A61B5/055
CPC分类号： A61B5/06 , A61B5/055 , A61B5/7207 , A61B2090/3958 , G01R33/285 , G01R33/34084
摘要： The invention relates to an MR arrangement which includes a medical instrument (3), an RF arrangement (17) which is provided thereon and in which at least one microcoil (1) and a capacitor (2) are connected so as to form a resonant circuit, and also an optical signal lead (4) via which a light signal is applied to the RF arrangement. In order to achieve simple and fast determination of the position of the medical instrument (3) within the examination zone of an MR apparatus, the invention proposes to provide a modulator (20) for modulating the light signal applied to the RF arrangement and also an optoelectrical converter (5) which converts the modulated light signal into an electrical signal and is coupled to the resonant circuit in such a manner that the resonant circuit is triggered by the electrical signal from the optoelectrical converter (5) so as to emit an RF field.
摘要翻译：本发明涉及一种MR装置，其包括医疗器械（3），设置在其上的RF装置（17），其中连接有至少一个微线圈（1）和电容器（2），以形成共振电路，以及光信号引线（4），通过该信号引线将光信号施加到RF装置。为了实现医疗器械（3）在MR装置的检查区域内的位置的简单和快速的确定，本发明提出了一种调制器（20），用于调制施加到RF装置的光信号，光电转换器（5），其将调制的光信号转换成电信号，并以这样的方式耦合到谐振电路，使得谐振电路由来自光电转换器（5）的电信号触发，以便发射RF场。

63. 发明申请

US20060281988A1 Process for locating a medical instrument with a microcoil 有权
标题翻译：用于定位带有微线圈的医疗器械的过程
公开(公告)号：US20060281988A1
公开(公告)日：2006-12-14
申请号：US10571523
申请日：2004-09-02
申请人： Steffen Weiss
发明人： Steffen Weiss
IPC分类号： A61B5/05
CPC分类号： G01R33/287
摘要： The invention relates to an MR process for locating a medical instrument with microcoil attached thereto in the examination volume of an MR device. The microcoil is part of a resonant circuit matched to the resonant frequency of the MR device and having no external controls. According to the invention at least two temporally successive high frequency pulses (RF) are generated within the examination volume, where after each of the high frequency pulses (RF) frequency-coded MR signals (S1, S2) from the examination volume are recorded. The position of the medical instrument is determined by analyzing the differences between the recorded MR signals (S1, S2).
摘要翻译：本发明涉及一种MR方法，用于定位在MR装置的检查体积中附着有微线圈的医疗器械。微线圈是与MR器件的谐振频率匹配且不具有外部控制的谐振电路的一部分。根据本发明，在检查体积内产生至少两个时间上连续的高频脉冲（RF），其中在每个高频脉冲（RF）频率编码的MR信号（S 1，S 3，S 记录检查体积中的<2> 。医疗器械的位置是通过分析所记录的MR信号（S SUB 1，S 2＆gt; 2＆gt;）之间的差异来确定的。

64. 发明申请

US20050104588A1 Method of examing an object by means of elastography 失效
标题翻译：通过弹性成像检查物体的方法
公开(公告)号：US20050104588A1
公开(公告)日：2005-05-19
申请号：US10506456
申请日：2003-02-26
申请人： Ralph Sinkus , Steffen Weiss
发明人： Ralph Sinkus , Steffen Weiss
IPC分类号： G01R33/28 , A61B5/055 , G01R33/563 , G01V3/00
CPC分类号： G01R33/56358 , A61B5/0051 , A61B5/055
摘要： The invention relates to a method of elastography whose diagnostic performance is improved in that the variation in time of the excursion whereby a region responds to excitation by mechanical oscillations is analyzed and the non-linear distortions are measured. Such distortions are a measure of the non-linear elastic properties of the region and constitute a diagnostically relevant item of information.
摘要翻译：本发明涉及一种弹性成像方法，其诊断性能得到改善，分析了区域对机械振荡对激发作出反应的偏移时间的变化，并测量了非线性失真。这种扭曲是衡量该地区的非线性弹性性质，并构成了诊断上相关的信息项目。

65. 发明授权

US08643372B2 RF safe transformer-coupled transmission line for MRI with reduced artifacts 有权
标题翻译：用于MRI的RF安全变压器耦合传输线，具有减少的伪影
公开(公告)号：US08643372B2
公开(公告)日：2014-02-04
申请号：US13142900
申请日：2010-01-20
申请人： Steffen Weiss
发明人： Steffen Weiss
IPC分类号： G01V3/00
CPC分类号： G01R33/287 , G01R33/288 , G01R33/3685
摘要： An electrically conductive transmission line is configured for use in the magnet bore of a magnetic resonance system and includes at least one inductive coupling element for coupling at least two lead segments of the line. The coupling element includes a paramagnetic and/or ferromagnetic material.
摘要翻译：导电传输线被配置为用于磁共振系统的磁体孔中，并且包括用于联接该线路的至少两个引线段的至少一个感应耦合元件。耦合元件包括顺磁和/或铁磁材料。

66. 发明授权

US08406852B2 MRI involving forwardly and reversely polarised RF excitation 有权
标题翻译：涉及前向和反向极化射频激发的MRI
公开(公告)号：US08406852B2
公开(公告)日：2013-03-26
申请号：US12681115
申请日：2008-10-02
申请人： Steffen Weiss
发明人： Steffen Weiss
IPC分类号： A61B5/055
CPC分类号： G01R33/287 , G01R33/3678 , G01R33/3692
摘要： A system for MR imaging of a body placed in an examination volume including main coils for establishing a substantially homogeneous main magnetic field in the examination volume, gradient coils for generating switched magnetic field gradients superimposed upon the main magnetic field, RF coils for radiating RF signals towards the body, a controller for controlling the generation of the magnetic field gradients and the RF signals, a processor for forming MR images from received MR signal samples, and an object having an RF antenna for receiving RF signals generated by the RF coils which are configured to generate circularly polarized RF signals having a selectable sense of rotation.
摘要翻译：一种放置在检查体积中的身体的MR成像系统，包括用于在检查体积中建立基本均匀的主磁场的主线圈，用于产生叠加在主磁场上的开关磁场梯度的梯度线圈，用于辐射RF信号的RF线圈朝向身体，用于控制磁场梯度和RF信号的产生的控制器，用于从接收的MR信号样本形成MR图像的处理器，以及具有用于接收由RF线圈产生的RF信号的RF天线的对象，所述RF天线是被配置为产生具有可选择的旋转感的圆偏振RF信号。

67. 发明申请

US20120203100A1 RADIO FREQUENCY ABLATION CATHETER AND MAGNETIC RESONANCE IMAGING SYSTEM 审中-公开
标题翻译：无线电频率吸收导管和磁共振成像系统
公开(公告)号：US20120203100A1
公开(公告)日：2012-08-09
申请号：US13503084
申请日：2010-10-25
申请人： Steffen Weiss , Sascha Krueger
发明人： Steffen Weiss , Sascha Krueger
IPC分类号： A61B5/055 , A61B18/00
CPC分类号： A61N1/06 , A61B5/0422 , A61B18/1492 , A61B2017/00084 , A61B2018/00023 , A61B2018/00029 , A61B2018/00791 , A61B2090/374 , A61N1/086 , G01R33/285 , G01R33/288
摘要： A catheter comprising:-a transmission line (104, 106, 924, 1202, 1302, 1902,), wherein the transmission line comprises a plurality of radio frequency traps (118, 318, 418, 518, 618, 718, 818, 918, 1018, 1202, 1404,); and-a cooling line (104, 304, 1200, 1900) for cooling the plurality of radio frequency traps with a fluid.
摘要翻译：一种导管，包括： - 传输线（104,106,924,1202,1201,1902），其中所述传输线包括多个无线电频率陷阱（118,318,418,518,618,718,818,918），1018，1202，1404，）; 和用于用流体冷却多个射频陷阱的冷却管线（104,304,1200,1900）。

68. 发明申请

US20120139541A1 DETERMINATION OF LOCAL SAR IN VIVO AND ELECTRICAL CONDUCTIVITY MAPPING 审中-公开
标题翻译：局部SAR在血液和电导率测绘中的测定
公开(公告)号：US20120139541A1
公开(公告)日：2012-06-07
申请号：US12933894
申请日：2009-03-25
申请人： Steffen Weiss , Ulrich Katscher , Peter Vernickel , Tobias Ratko Voigt , Christian Findeklee
发明人： Steffen Weiss , Ulrich Katscher , Peter Vernickel , Tobias Ratko Voigt , Christian Findeklee
IPC分类号： G01R33/44
CPC分类号： G01R33/583 , A61B5/055 , G01R33/288
摘要： A magnetic resonance imaging apparatus produces calculations of local specific energy absorption rates (SAR) by calculating an electrical permittivity map of a subject. The electric permittivity is calculated by measuring the components of the B1 field induced by a radio frequency (RF) coil (16). The Hx and Hy components of the B1 field can be directly measured. The Hz component is measured by encoding it into the phase of the resonance signals. Alternately, Hz can be calculated by solving Gauss's law for magnetism. Hz can also be estimated by finding the z component of the electric field. In the specific case of a birdcage RF coil, Hz can be estimated by using a model of the RF coil and a subject, a model of the RF coil alone, or setting Hz to a constant.
摘要翻译：磁共振成像装置通过计算受试者的电容率图来产生局部比能吸收率（SAR）的计算。通过测量由射频（RF）线圈（16）感应的B1场的分量来计算电容率。可以直接测量B1场的Hx和Hy分量。通过对谐振信号的相位进行编码来测量Hz分量。或者，可以通过求解磁性的高斯定律来计算Hz。 Hz也可以通过找到电场的z分量来估计。在鸟笼RF线圈的具体情况下，可以通过使用RF线圈和对象的模型，单独的RF线圈的模型或将Hz设置为常数来估计Hz。

69. 发明申请

US20100277175A1 TUNABLE AND/OR DETUNABLE MR RECEIVE COIL ARRANGEMENTS 审中-公开
标题翻译：可接受和/或解除接收线圈安排
公开(公告)号：US20100277175A1
公开(公告)日：2010-11-04
申请号：US12377607
申请日：2007-08-10
申请人： Steffen Weiss
发明人： Steffen Weiss
IPC分类号： G01R33/44
CPC分类号： G01R33/0283 , G01R33/287 , G01R33/34046 , G01R33/34076 , G01R33/34084 , G01R33/341 , G01R33/36 , G01R33/3657
摘要： MR receive (or reception) coil arrangements are disclosed which comprise at least one MR receive coil or coil element or coil system (9) which can be tuned and/or detuned in relation to an MR frequency, and which further comprise a transmission line (7) for electrically connecting the MR receive coil or coil element or coil system (9) with an MR receiver (10). Especially such MR receive coil arrangements are disclosed which are not provided for being stationarily (or permanently) installed or built in an examination zone of an MR imaging or examination system or apparatus (MRI system), like a whole-body coil system of such an MRI system, but which are mobile, like e.g. interventional or invasive devices, like catheters, or surface coils, e.g. in the form of (especially flexible) pads which are positioned on a surface of an examination object for examining a region of interest, or volume coils like birdcage coils for enclosing and examining a volume of interest. Finally, an MR imaging or examination system (MRI system) comprising such an MR receive coil arrangement is disclosed.
摘要翻译：公开了MR接收（或接收）线圈装置，其包括至少一个MR接收线圈或线圈元件或线圈系统（9），其可以相对于MR频率被调谐和/或失谐，并且还包括传输线 7），用于将MR接收线圈或线圈元件或线圈系统（9）与MR接收器（10）电连接。特别地，公开了这样的MR接收线圈装置，其不被设置为静态（或永久地）安装或建立在MR成像或检查系统或装置（MRI系统）的检查区域中，例如这样的全身线圈系统 MRI系统，但是哪些是移动的，例如介入或侵入性装置，如导管或表面线圈，例如导管。（特别是柔性的）垫的形式，其位于用于检查感兴趣区域的检查对象的表面上，或者用于封闭和检查感兴趣体积的体积线圈如鸟笼线圈。最后，公开了包括这种MR接收线圈装置的MR成像或检查系统（MRI系统）。

70. 发明申请

US20100181109A1 TRANSMISSION CABLE FOR USE IN RADIO-FREQUENCY MAGNETIC OR ELECTRICAL FIELDS 有权
标题翻译：用于无线电频率电磁场的变速电缆
公开(公告)号：US20100181109A1
公开(公告)日：2010-07-22
申请号：US12665947
申请日：2008-06-27
申请人： Sascha Krueger , Bernd David , Oliver Lips , Steffen Weiss , Daniel Wirtz
发明人： Sascha Krueger , Bernd David , Oliver Lips , Steffen Weiss , Daniel Wirtz
IPC分类号： H01B7/00
CPC分类号： G01R33/36 , A61B18/14 , A61B2018/00178 , A61B2090/374 , A61N1/086 , G01R33/287 , G01R33/288 , G01R33/3664
摘要： A transmission cable for use in an elongate medical device (420) such as a catheter, guide wire, etc., wherein the transmission cable is capable of being switched to an MR-safe mode only when necessary, while retaining its optimal electrical transmission properties otherwise, is disclosed herein. The transmission cable comprises a transmission line including at least two electrically conductive line segments (104a, 104b) separated by a non-conductive gap (106a), a bridging unit comprising at least one electrically conductive bridge segment (108a) capable of bridging the non-conductive gap, and a switching unit (112) arranged to move the bridging unit and/or the transmission line to electrically connect the two line segments by closing the non-conductive gap using the bridge segment or to electrically disconnect the two line segments by opening the non-conductive gap.
摘要翻译：一种用于诸如导管，导丝等细长医疗设备（420）的传输电缆，其中传输电缆仅在必要时能够切换到MR安全模式，同时保持其最佳电气传输特性否则，在此公开。传输电缆包括传输线，传输线包括由非导电间隙（106a）隔开的至少两个导电线段（104a，104b）;桥接单元，包括至少一个导电桥段（108a）以及开关单元（112），其布置成使桥接单元和/或传输线移动以通过使用桥接段闭合非导电间隙来电连接两个线段，或者通过打开非导电间隙。

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