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61. 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。

62. 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。

63. 发明授权

US06317619B1 Apparatus, methods, and devices for magnetic resonance imaging controlled by the position of a moveable RF coil 失效
标题翻译：用于由可移动RF线圈的位置控制的磁共振成像的装置，方法和装置
公开(公告)号：US06317619B1
公开(公告)日：2001-11-13
申请号：US09363349
申请日：1999-07-29
申请人： Peter Boernert , Tobias Richard Schaeffter , Steffen Weiss
发明人： Peter Boernert , Tobias Richard Schaeffter , Steffen Weiss
IPC分类号： A61B5055
CPC分类号： G01R33/341 , G01R33/34007 , G01R33/3806 , G01R33/543 , G01R33/546 , G01R33/58
摘要： Objects of this invention include provision of magnetic resonance (MR) imaging methods, MR apparatus, and radio-frequency (RF) receiving coil devices permitting interactive MR examination of a patient. In particular, this invention includes means for generating MR images by a moveable RF coil which can be moved across a patient during an MR examination. The MR apparatus includes a position detection system which detects the current position and orientation of the moveable RF coil. The coil can be hand held for manual movement or can be attached to mechanical manipulators for controlled movement. The imaging methods determine and generate magnetic gradient and RF pulse sequences to excite nuclear magnetization in a 3D region determined with respect to the current 3D position and 3D orientation of the moveable RF coil. The invention also includes moveable RF coils for receiving and transmitting which are configured and sized for convenient manipulation by an operator. A preferable moveable RF coil assembly includes markers necessary to interact with a particular position detection system, display means for displaying reconstructed images in real-time, and control means for operator entry of signals controlling the MR apparatus. This invention also includes a carrier medium with recorded program instructions for controlling a programmable MR apparatus to perform the disclosed methods.
摘要翻译：本发明的目的包括提供磁共振（MR）成像方法，MR装置和允许患者的交互式MR检查的射频（RF）接收线圈装置。具体地，本发明包括用于通过可移动RF线圈产生MR图像的装置，其可以在MR检查期间跨越患者移动。 MR装置包括检测可动RF线圈的当前位置和方向的位置检测系统。线圈可以手持进行手动运动，也可以连接到机械操纵器上以进行控制运动。成像方法确定并产生磁梯度和RF脉冲序列，以在相对于可移动RF线圈的当前3D位置和3D取向确定的3D区域中激发核磁化。本发明还包括用于接收和发送的可移动RF线圈，其被配置和大小以便操作者方便操作。优选的可动RF线圈组件包括与特定位置检测系统相互作用所需的标记，用于实时显示重建图像的显示装置和用于操作者输入控制该MR装置的信号的控制装置。本发明还包括具有用于控制可编程MR装置以执行所公开的方法的记录的程序指令的载体介质。

64. 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。

65. 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。

66. 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）。

67. 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。

68. 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）。

69. 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。

70. 发明授权

US07742799B2 Catheter tip tracking for interventional procedures monitored by magnetic resonance imaging 有权
标题翻译：通过磁共振成像监测的介入手术的导管尖跟踪
公开(公告)号：US07742799B2
公开(公告)日：2010-06-22
申请号：US10570711
申请日：2004-09-01
申请人： Joerg C. Mueller , Steffen Weiss
发明人： Joerg C. Mueller , Steffen Weiss
IPC分类号： A61B5/055
CPC分类号： G01R33/3692 , A61B5/055 , G01R33/287 , G01R33/34084 , G01R33/3628
摘要： A tracking device (20, 20′) for tracking a tip (14) of an interventional instrument such as a catheter (10) during an interventional procedure performed on an associated subject (12) and monitored by magnetic resonance imaging includes a resonant circuit (22) disposed at the tip (14) of the catheter (10). The resonant circuit (22) includes a coil (32, 32′) having a coil inductance and a light-sensitive metal-insulator-semiconductor capacitor (30) optically coupled with an optical fiber (36) and having a selected capacitance determined by an intensity of light delivered by the optical fiber (36). A selected resonance frequency of the resonant circuit (22) is determined by the coil inductance and the selected capacitance. The resonance frequency is adjusted by modulating the intensity of light delivered to the light-sensitive metal-insulator-semiconductor capacitor (30).
摘要翻译：用于跟踪介入仪器（例如导管）的尖端（14）的跟踪装置（20,20'）在对相关对象（12）执行并由磁共振成像监测的介入过程期间包括谐振电路（ 22）设置在导管（10）的尖端（14）处。谐振电路（22）包括具有线圈电感的线圈（32,32'）和与光纤（36）光学耦合的感光金属 - 绝缘体 - 半导体电容器（30），并且具有由由光纤（36）传送的光的强度。谐振电路（22）的选定谐振频率由线圈电感和所选择的电容确定。通过调制传递到感光金属 - 绝缘体 - 半导体电容器（30）的光的强度来调节谐振频率。

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