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    Apparatus and method to improve magnet stability in an MRI system
    1.
    发明授权
    Apparatus and method to improve magnet stability in an MRI system 有权
    提高MRI系统磁体稳定性的装置和方法

    公开(公告)号：US08314615B2

    公开(公告)日：2012-11-20

    申请号：US12644047

    申请日：2009-12-22

    申请人： Longzhi Jiang ,  John Scaturro, Jr. ,  William Einziger ,  Yuri Lvovsky ,  Robbi McDonald ,  Xiaoxue Diao

    发明人： Longzhi Jiang ,  John Scaturro, Jr. ,  William Einziger ,  Yuri Lvovsky ,  Robbi McDonald ,  Xiaoxue Diao

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3802 ,  G01R33/3815 ,  Y10T29/49014

    摘要： An MRI apparatus and method comprises an MRI system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images. The magnet comprises a main coil former and a shield coil former arranged radially around the bore of the magnet, wherein a radius of the shield coil former is greater than a radius of the main coil former. The magnet also includes at least one main coil affixed to the main coil former, at least one shield coil affixed to the shield coil former, and at least one structural member affixed to the main coil former and to the shield coil former to provide structural support and enable longitudinal alignment adjustment between the main coil former and the shield coil former.

    摘要翻译： MRI装置和方法包括具有围绕磁体的孔定位的多个梯度线圈的MRI系统，以及RF收发器系统和由脉冲模块控制的RF开关，以将RF信号传输到RF线圈组件以获取MR图像 。 磁体包括主要线圈形成器和围绕磁体孔的径向设置的屏蔽线圈架，其中屏蔽线圈架的半径大于主线圈架的半径。 磁体还包括固定到主线圈架上的至少一个主线圈，固定到屏蔽线圈架的至少一个屏蔽线圈，以及固定到主线圈架和至屏蔽线圈架上的至少一个结构构件，以提供结构支撑 并且使得能够在主线圈架和屏蔽线圈架之间进行纵向对准调节。

    APPARATUS AND METHOD TO IMPROVE MAGNET STABILITY IN AN MRI SYSTEM
    2.
    发明申请
    APPARATUS AND METHOD TO IMPROVE MAGNET STABILITY IN AN MRI SYSTEM 有权
    在MRI系统中提高磁铁稳定性的装置和方法

    公开(公告)号：US20110148416A1

    公开(公告)日：2011-06-23

    申请号：US12644047

    申请日：2009-12-22

    申请人： Longzhi Jiang ,  John Scaturro, JR. ,  William Einziger ,  Yuri Lvovsky ,  Robbi McDonald ,  Xiaoxue Diao

    发明人： Longzhi Jiang ,  John Scaturro, JR. ,  William Einziger ,  Yuri Lvovsky ,  Robbi McDonald ,  Xiaoxue Diao

    IPC分类号： G01R33/44 ,  H01L39/24 ,  H01F6/00

    CPC分类号： G01R33/3802 ,  G01R33/3815 ,  Y10T29/49014

    摘要： An MRI apparatus and method comprises an MRI system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images. The magnet comprises a main coil former and a shield coil former arranged radially around the bore of the magnet, wherein a radius of the shield coil former is greater than a radius of the main coil former. The magnet also includes at least one main coil affixed to the main coil former, at least one shield coil affixed to the shield coil former, and at least one structural member affixed to the main coil former and to the shield coil former to provide structural support and enable longitudinal alignment adjustment between the main coil former and the shield coil former.

    摘要翻译： MRI装置和方法包括具有围绕磁体的孔定位的多个梯度线圈的MRI系统，以及RF收发器系统和由脉冲模块控制的RF开关，以将RF信号传输到RF线圈组件以获取MR图像 。 磁体包括主要线圈形成器和围绕磁体孔的径向设置的屏蔽线圈架，其中屏蔽线圈架的半径大于主线圈架的半径。 磁体还包括固定到主线圈架上的至少一个主线圈，固定到屏蔽线圈架的至少一个屏蔽线圈，以及固定到主线圈架和至屏蔽线圈架上的至少一个结构构件，以提供结构支撑 并且使得能够在主线圈架和屏蔽线圈架之间进行纵向对准调节。

    Magnetic field generating apparatus for magnetic resonance imaging
    5.
    发明申请
    Magnetic field generating apparatus for magnetic resonance imaging 有权
    用于磁共振成像的磁场产生装置

    公开(公告)号：US20070146107A1

    公开(公告)日：2007-06-28

    申请号：US11321555

    申请日：2005-12-28

    申请人： Yuri Lvovsky ,  Michael Sellers ,  Timothy Havens

    发明人： Yuri Lvovsky ,  Michael Sellers ,  Timothy Havens

    IPC分类号： H01F3/00

    CPC分类号： G01R33/3806 ,  G01R33/3815 ,  G01R33/3873 ,  G01R33/3875 ,  H01F6/00

    摘要： A Magnetic Resonance Imaging (MRI) system is disclosed. The MRI system includes a cryogenic magnet assembly with a cryogenic vessel housing a superconducting magnet. Disposed radially inboard of the cryogenic magnet assembly are a gradient coil module and a plurality of room temperature steel rings proximate to the gradient coil module. A field of view is defined by at least the superconducting magnet, the gradient coil module, and the plurality of room temperature steel rings. In response to the superconducting magnet being energized, the room temperature steel rings create high order harmonics that serve to expand the magnetic field homogeneity FOV, and low order harmonics that tend to degrade the magnetic field homogeneity within the FOV. The low order harmonics are compensated for by the cryogenic magnet assembly.

    摘要翻译： 公开了磁共振成像（MRI）系统。 MRI系统包括具有容纳超导磁体的低温容器的低温磁体组件。 设置在低温磁体组件的径向内侧的是梯度线圈模块和靠近梯度线圈模块的多个室温钢环。 视野至少由超导磁体，梯度线圈模块和多个室温钢环形成。 响应于超导磁体被激励，室温钢环产生用于扩大磁场均匀性FOV的高阶谐波和易于降低FOV内的磁场均匀性的低次谐波。 低次谐波被低温磁体组件补偿。

    Split type magnetic resonance imaging magnet
    6.
    发明授权
    Split type magnetic resonance imaging magnet 失效
    分体型磁共振成像磁体

    公开(公告)号：US06570475B1

    公开(公告)日：2003-05-27

    申请号：US09716765

    申请日：2000-11-20

    申请人： Yuri Lvovsky ,  Robert E. Wilcox ,  A. Kamal Kalafala ,  Leo Blecher

    发明人： Yuri Lvovsky ,  Robert E. Wilcox ,  A. Kamal Kalafala ,  Leo Blecher

    IPC分类号： G01V300

    CPC分类号： G01R33/421 ,  G01R33/3815

    摘要： An MRI magnet assembly includes a pair of cryostat enclosures each housing a superconducting primary shield coil. The primary shield coil is dimensioned with an outer diameter greater than that of the main coil and is axially spaced away from the magnet pole significantly farther than is the main coil. This design provides for increased accessibility and visibility within the gap defined between the cryostat enclosures, and allows for reduced amounts of superconducting material in the coils. A set of field shaping coils is mounted radially inwardly and closely axially adjacent to the magnet pole and axially between the main coil and the shield coil.

    摘要翻译： MRI磁体组件包括一对低温恒温箱，每个低温恒温箱容纳超导主屏蔽线圈。 主屏蔽线圈的尺寸设计大于主线圈的外径，并且与主线圈相比远离磁极轴向间隔开。 该设计提供了在低温恒温箱之间限定的间隙内增加的可接近性和可视性，并允许在线圈中减少量的超导材料。 一组场整形线圈径向向内和紧密地轴向地安装在磁极附近并且在主线圈和屏蔽线圈之间轴向安装。

    SUPERCONDUCTING MAGNET COIL INTERFACE AND METHOD PROVIDING COIL STABILITY
    7.
    发明申请
    SUPERCONDUCTING MAGNET COIL INTERFACE AND METHOD PROVIDING COIL STABILITY 有权
    超级磁铁线圈接口和提供线圈稳定性的方法

    公开(公告)号：US20110148417A1

    公开(公告)日：2011-06-23

    申请号：US12646917

    申请日：2009-12-23

    申请人： Yuri Lvovsky

    发明人： Yuri Lvovsky

    IPC分类号： G01R33/3815 ,  H01F6/04

    CPC分类号： G01R33/3815 ,  G01R33/3804 ,  H01F6/04

    摘要： A superconducting magnet coil interface and method providing coil stability are provided. A superconducting coil arrangement includes a superconducting coil and a thermal interface coupled to the superconducting coil. The thermal interface is configured to intercept frictional heat before reaching the superconducting coil. The superconducting coil arrangement further includes a plurality of channels extending within at least a portion of the thermal interface and towards the superconducting coil. The plurality of channels are configured to receive therein a cooling liquid.

    摘要翻译： 提供了提供线圈稳定性的超导磁体线圈接口和方法。 超导线圈装置包括超导线圈和耦合到超导线圈的热界面。 热界面构造成在到达超导线圈之前拦截摩擦热。 超导线圈装置还包括在热界面的至少一部分内并朝向超导线圈延伸的多个通道。 多个通道构造成在其中容纳冷却液体。

    SYSTEM AND APPARATUS FOR DIRECT COOLING OF GRADIENT COILS
    8.
    发明申请
    SYSTEM AND APPARATUS FOR DIRECT COOLING OF GRADIENT COILS 有权
    系统和装置用于直接冷却等级线圈

    公开(公告)号：US20080259560A1

    公开(公告)日：2008-10-23

    申请号：US11738786

    申请日：2007-04-23

    申请人： Yuri Lvovsky

    发明人： Yuri Lvovsky

    IPC分类号： H05K7/20

    CPC分类号： G01R33/3856 ,  G01R33/4215

    摘要： A system for cooling a gradient coil assembly of a magnetic resonance imaging (MRI) system includes a gradient coil having a first surface comprising a plurality of conductors and a plurality of inter-turn channels. Each inter-turn channel is located between turns of the plurality of conductors. The system also includes a seal layer applied to the first surface of the gradient coil to seal the inter-turn channels. The inter-turn channels are configured to transport a cooling fluid. Alternatively, at least one cooling tube may be located in the inter-turn channels of the gradient coil in order to transport a cooling fluid.

    摘要翻译： 用于冷却磁共振成像（MRI）系统的梯度线圈组件的系统包括具有包括多个导体和多个匝间通道的第一表面的梯度线圈。 每个匝间通道位于多个导体的匝之间。 该系统还包括施加到梯度线圈的第一表面上的密封层以密封匝间通道。 匝间通道被构造成输送冷却流体。 或者，至少一个冷却管可以位于梯度线圈的匝间通道中，以便输送冷却流体。

    Methods and apparatus for MRI shim elements
    9.
    发明申请
    Methods and apparatus for MRI shim elements 有权
    MRI垫片元件的方法和装置

    公开(公告)号：US20070252598A1

    公开(公告)日：2007-11-01

    申请号：US11414606

    申请日：2006-04-28

    申请人： Yuri Lvovsky

    发明人： Yuri Lvovsky

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3873

    摘要： A MRI shim element includes a plurality of thin wires extending substantially parallel to each other wherein each wire has cross sectional dimensions less than δsk, wherein δsk is the wire's skin depth.

    摘要翻译： MRI垫片元件包括基本上彼此平行延伸的多条细线，其中每根导线具有小于三角形的横截面尺寸，其中，第三层是导线的表层深度 。

    Displacer and superconducting magnet
    10.
    发明授权
    Displacer and superconducting magnet 有权
    位移和超导磁体

    公开(公告)号：US08793991B2

    公开(公告)日：2014-08-05

    申请号：US12630532

    申请日：2009-12-03

    申请人： Gregory Citver ,  William Louis Einziger ,  Yuri Lvovsky

    发明人： Gregory Citver ,  William Louis Einziger ,  Yuri Lvovsky

    IPC分类号： F02G1/04 ,  F01B29/00 ,  H01F6/04 ,  G01R33/38 ,  G01R33/3815

    CPC分类号： H01F6/04 ,  G01R33/3804 ,  G01R33/3815

    摘要： A displacer for adjusting a level of a liquid cryogen in a cryostat. The displacer including an expandable member at least partially defining a sealed chamber. The expandable member being configured to transition from a collapsed state where the sealed chamber has a smaller volume to an expanded state where the sealed chamber has a larger volume. The displacer includes a first end piece attached to a first end of the expandable member and a second end piece attached to a second end of the expandable member.

    摘要翻译： 用于调节低温恒温器中液体冷冻剂水平的置换器。 所述置换器包括至少部分地限定密封室的可膨胀构件。 可膨胀构件被构造成从密封室具有较小体积的折叠状态转变到密封室具有较大体积的膨胀状态。 置换器包括附接到可扩张构件的第一端的第一端件和附接到可扩张构件的第二端的第二端件。