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    RF coil for very high field magnetic resonance imaging
    11.
    发明授权
    RF coil for very high field magnetic resonance imaging 有权
    RF线圈用于非常高的场磁共振成像

    公开(公告)号：US06822448B2

    公开(公告)日：2004-11-23

    申请号：US09839940

    申请日：2001-04-20

    申请人： Ronald Dean Watkins ,  John Frederick Schenck

    发明人： Ronald Dean Watkins ,  John Frederick Schenck

    IPC分类号： G01V300

    CPC分类号： G01R33/34046

    摘要： A radio frequency (RF) coil assembly for a very high field Magnetic Resonance Imaging (MRI) system is provided comprising a plurality of conductors arranged cylindrically and disposed about a cylindrical patient bore tube of the MRI system and a plurality of capacitive elements for electrically interconnecting the plurality of conductors at respective ends of the conductors. The conductors have a width selected for the RF coil assembly to resonate at substantially high frequencies. A very high field Magnetic Resonance Imaging (MRI) system is provided that comprises a RF coil assembly adapted to resonate at substantially high frequencies, a RF coil shield assembly and a plurality of RF drive power cables.

    摘要翻译： 提供了一种用于非常高场磁共振成像（MRI）系统的射频（RF）线圈组件，其包括围绕MRI系统的圆柱形患者钻孔管圆柱形布置的多个导体和用于电互连的多个电容元件 在导体的相应端部处的多个导体。 导体具有选择用于RF线圈组件的宽度以基本上高的频率谐振。 提供了一种非常高的场磁共振成像（MRI）系统，其包括适于基本上高频率谐振的RF线圈组件，RF线圈屏蔽组件和多个RF驱动电力电缆。

    Method and apparatus for very high field magnetic resonance imaging systems
    12.
    发明授权
    Method and apparatus for very high field magnetic resonance imaging systems 有权
    非常高场磁共振成像系统的方法和装置

    公开(公告)号：US06791328B1

    公开(公告)日：2004-09-14

    申请号：US10456816

    申请日：2003-06-06

    申请人： Akira Nabetani ,  Ronald Dean Watkins

    发明人： Akira Nabetani ,  Ronald Dean Watkins

    IPC分类号： G01V300

    CPC分类号： G01R33/34076 ,  G01R33/34007 ,  G01R33/3453 ,  G01R33/3657

    摘要： A radio frequency (RF) coil assembly for imaging a subject volume using a very high field Magnetic Resonance Imaging (MRI) system operable at substantially high frequencies includes a plurality of conductors arranged cylindrically and disposed about a patient bore of the MRI system, a plurality of capacitive elements disposed between and connecting respective ends of the conductors, the plurality of conductors and plurality of capacitive elements forming a high band pass birdcage configuration, and a plurality of dynamic disabling switches, each dynamic disabling switch electrically coupled in parallel with a respective capacitive element to form a parallel resonant circuit.

    摘要翻译： 用于使用可在基本上高频率操作的非常高场磁共振成像（MRI）系统对目标体积进行成像的射频（RF）线圈组件包括圆柱形布置并围绕MRI系统的患者孔布置的多个导体，多个 设置在导体之间并连接导体的相应端部之间的电容元件，多个导体和形成高带通鸟笼配置的多个电容元件以及多个动态禁用开关，每个动态禁用开关与相应的电容器 元件以形成并联谐振电路。

    Method to automatically tune MRI RF coils
    14.
    发明授权
    Method to automatically tune MRI RF coils 失效
    自动调节MRI射频线圈的方法

    公开(公告)号：US06184684B2

    公开(公告)日：2001-02-06

    申请号：US09505975

    申请日：2000-02-16

    申请人： Charles Lucien Dumoulin ,  Ronald Dean Watkins ,  Icko Eric Timothy Iben ,  Sayed-Amr Ahmes El-Hamamsy ,  William Alan Edelstein

    发明人： Charles Lucien Dumoulin ,  Ronald Dean Watkins ,  Icko Eric Timothy Iben ,  Sayed-Amr Ahmes El-Hamamsy ,  William Alan Edelstein

    IPC分类号： G01V300

    CPC分类号： G01R33/3628

    摘要： A sweep generator 230 applies a range of frequencies to an rf coil 140 to detect the resonant frequency of a field generated by a magnet 125a,b. A frequency to current converter 220 applies an auxiliary magnetic field to tune an MRI apparatus to the resonant frequency of the rf coil. A flexible coil of one turn (300) or two or more turns (500) has a plurality of segments (301-307; 501-513). One of the belt has a contact k0, (k0′), which is electrically connectable to one or more contacts k1, (k1′), k2, (k2′), etc. located between the ends of the segments. For each connection to successive contacts, the length of the coil and its inductance increases by the added impedance DLij between contacts ki and kj. That increase of inductance is nullified by capacitors DCsij located between segments.

    摘要翻译： 扫描发生器230将频率范围施加到射频线圈140以检测由磁体125a产生的场的共振频率，b。 频率到电流转换器220施加辅助磁场以将MRI装置调谐到rf线圈的谐振频率。 一圈（300）或两匝（500）的柔性线圈具有多个段（301-307; 501-513）。 带中的一个具有可以与位于段的端部之间的一个或多个触点k1，（k1'），k2，（k2'）等电连接的触点k0（k0'）。 对于与连续触点的每个连接，线圈的长度及其电感通过触点ki和kj之间的相加阻抗DLij而增加。 电感的增加被位于段之间的电容器DCsij无效。

    Optical control of radio frequency antennae in a magnetic resonance imaging system
    15.
    发明授权
    Optical control of radio frequency antennae in a magnetic resonance imaging system 有权
    磁共振成像系统中射频天线的光学控制

    公开(公告)号：US6144205A

    公开(公告)日：2000-11-07

    申请号：US195657

    申请日：1998-11-19

    申请人： Steven Peter Souza ,  Ronald Dean Watkins

    发明人： Steven Peter Souza ,  Ronald Dean Watkins

    IPC分类号： G01R33/34 ,  G01R33/36 ,  G01V3/00

    CPC分类号： G01R33/3692 ,  G01R33/341 ,  G01R33/3657

    摘要： A local RF antenna assembly for a magnetic resonance imaging (MRI) system includes a conducting RF antenna structure. First and second capacitors are connected in series with the inductance of the RF antenna structure to form a circuit that resonates at a Larmor frequency. An inductor has a first terminal connected to a node between the first and second capacitors and has a second terminal. A photosensitive first semiconductor switch is connected between the second terminal of the inductor and one terminal of the RF antenna inductance. A receive coil control selectively provides illumination that places the photosensitive first semiconductor switch in a conductive state. When the photosensitive first semiconductor switch is conductive, the inductor disables resonance of the RF antenna circuit at the Larmor frequency. This action inhibits the RF receive antenna from interacting with other antennae in the MRI system.

    摘要翻译： 用于磁共振成像（MRI）系统的本地RF天线组件包括导电RF天线结构。 第一和第二电容器与RF天线结构的电感串联连接以形成以拉莫尔频率谐振的电路。 电感器具有连接到第一和第二电容器之间的节点的第一端子，并且具有第二端子。 光敏第一半导体开关连接在电感器的第二端和RF天线电感的一端之间。 接收线圈控制器选择性地提供使光敏第一半导体开关处于导通状态的照明。 当光敏第一半导体开关导通时，电感器以拉莫尔频率禁止RF天线电路的谐振。 该动作阻止RF接收天线与MRI系统中的其他天线相互作用。

    Method to automatically tune MRI RF coils
    16.
    发明授权
    Method to automatically tune MRI RF coils 失效
    自动调节MRI射频线圈的方法

    公开(公告)号：US6054858A

    公开(公告)日：2000-04-25

    申请号：US789114

    申请日：1997-01-27

    申请人： Charles Lucien Dumoulin ,  Ronald Dean Watkins ,  Icko Eric Timothy Iben ,  Sayed-Amr Ahmes El-Hamamsy ,  William Alan Edelstein

    发明人： Charles Lucien Dumoulin ,  Ronald Dean Watkins ,  Icko Eric Timothy Iben ,  Sayed-Amr Ahmes El-Hamamsy ,  William Alan Edelstein

    IPC分类号： G01R33/36 ,  G01V3/00

    CPC分类号： G01R33/3628

    摘要： A sweep generator 230 applies a range of frequencies to an rf coil 140 to detect the resonant frequency of a field generated by a magnet 125a,b. A frequency to current converter 220 applies an auxiliary magnetic field to tune an MRI apparatus to the resonant frequency of the rf coil. A flexible coil of one turn (300) or two or more turns (500) has a plurality of segments (301-307; 501-513). One of the belt has a contact k0, (k0'), which is electrically connectable to one or more contacts k1, (k1'), k2, (k2'), etc. located between the ends of the segments. For each connection to successive contacts, the length of the coil and its inductance increases by the added impedance .DELTA.L.sub.ij between contacts k.sub.i and k.sub.j. That increase of inductance is nullified by capacitors .DELTA.C.sub.sij located between segments.

    摘要翻译： 扫描发生器230将频率范围施加到射频线圈140以检测由磁体125a产生的场的共振频率，b。 频率到电流转换器220施加辅助磁场以将MRI装置调谐到rf线圈的谐振频率。 一圈（300）或两匝（500）的柔性线圈具有多个段（301-307; 501-513）。 带中的一个具有可以与位于段的端部之间的一个或多个触点k1，（k1'），k2，（k2'）等电连接的触点k0（k0'）。 对于与连续触点的每个连接，线圈的长度及其电感增加了触点ki和kj之间的附加阻抗DELTA Lij。 电感增加由位于片段之间的电容器DELTA Csij无效。

    Optical coupling for invasive devices
    17.
    发明授权
    Optical coupling for invasive devices 失效
    用于入侵设备的光耦合器

    公开(公告)号：US5882305A

    公开(公告)日：1999-03-16

    申请号：US954150

    申请日：1997-10-20

    申请人： Charles Lucian Dumoulin ,  Ronald Dean Watkins ,  Robert David Darrow ,  Steven Peter Souza

    发明人： Charles Lucian Dumoulin ,  Ronald Dean Watkins ,  Robert David Darrow ,  Steven Peter Souza

    IPC分类号： G01K7/00 ,  A61B5/00 ,  A61B5/01 ,  A61B5/055 ,  G01R33/28 ,  G01R33/48

    CPC分类号： A61B5/01 ,  A61B5/055 ,  G01R33/287 ,  G01R33/4804

    摘要： An optical coupling is incorporated into an invasive device used in magnetic resonance (MR) imaging. The coupling is incorporated into the invasive device between an imaging or tracking RF coil, and the MR receiver. The optical coupling has a first transducer circuit coupled to the RF which converts between optical and electrical signals. An optical fiber is coupled to the first transducer circuit and extends out of the invasive device to medical imaging equipment. Near this equipment, a second transducer circuit converts optical signals to electrical, and electrical signals to optical, just opposite that of the first transducer circuit. The present invention thereby replaces long lead wires which can cause heating during MR imaging, and may distort an MR image.

    摘要翻译： 光耦合器被并入用于磁共振（MR）成像的侵入性装置中。 耦合结合到成像或跟踪RF线圈与MR接收器之间的侵入性装置中。 光耦合器具有耦合到RF的第一传感器电路，其在光信号和电信号之间进行转换。 光纤耦合到第一换能器电路，并且从侵入性装置延伸到医疗成像设备。 在该设备附近，第二传感器电路将光信号转换成电，并将电信号转换成与第一换能器电路相反的光信号。 因此，本发明代替在MR成像期间可能引起加热的长引线，并且可能使MR图像失真。

    Ultrasound transducer with focused ultrasound refraction plate
    18.
    发明授权
    Ultrasound transducer with focused ultrasound refraction plate 失效
    超声波换能器与聚焦超声折射板

    公开(公告)号：US5873845A

    公开(公告)日：1999-02-23

    申请号：US818988

    申请日：1997-03-17

    申请人： Harvey Ellis Cline ,  Ronald Dean Watkins ,  George Raymond Russell ,  Kullervo Henrik Hynynen

    发明人： Harvey Ellis Cline ,  Ronald Dean Watkins ,  George Raymond Russell ,  Kullervo Henrik Hynynen

    IPC分类号： A61B17/22 ,  A61B17/225 ,  A61B19/00 ,  A61N7/02 ,  G10K11/30

    CPC分类号： G10K11/30 ,  A61N7/02 ,  A61B2017/22028 ,  A61B2090/374

    摘要： A system for performing surgery by vibrational heating employs an ultrasonic transducer 80 for focusing a spherical ultrasound wave on a focal region. In one embodiment a refraction plate 410 having a spherical surface facing the transducer and a refracting surface with refracting pyramid elements 450 facing the subject causes the ultrasound beam to impinge on a plurality of overlapping focal regions and thereby expand the focal area of the transducer. In a second embodiment the refraction plate comprises a phased lens 600 having a constant thickness at any angular location but with its thickness varying linearly over 2.pi. radians or multiples thereof.

    摘要翻译： 用于通过振动加热进行手术的系统使用用于将球状超声波聚焦在焦点区域上的超声波换能器80。 在一个实施例中，具有面向换能器的球形表面的折射板410和面向被摄体的折射金字塔元件450的折射表面使得超声波束撞击在多个重叠的焦点区域上，从而扩大换能器的焦点区域。 在第二实施例中，折射板包括在任何角度位置具有恒定厚度的相控透镜600，但其厚度在2π弧度或其倍数上线性变化。