公开(公告)号：US20070262777A1

公开(公告)日：2007-11-15

申请号：US11575151

申请日：2005-08-19

申请人： Marcel Warntjes ,  Marinus Van Helvoort ,  Thomas Chmielewski ,  Steven Koenig ,  Thomas Chmielewski

发明人： Marcel Warntjes ,  Marinus Van Helvoort ,  Thomas Chmielewski ,  Steven Koenig ,  Thomas Chmielewski

IPC分类号： G01V3/00

CPC分类号： G01R33/3657 ,  G01R33/34007 ,  G01R33/3628

摘要： A low profile radio frequency coil (32, 44, 441, 442, 443) for use in a magnetic resonance imaging system includes a low profile antenna (34, 102, 202, 302) that is configured to resonate at about a magnetic resonance frequency of the magnetic resonance imaging system. A generally planar inductor (110, 112, 210, 240, 310) is electrically connected or coupled with the low profile antenna. The generally planar inductor provides selected frequency filtering of a radio frequency signal received by or transmitted by the low profile antenna.

摘要翻译： 一种用于磁共振成像系统的低频无线电频率线圈（32,44,44个，44个，44个3）包括 配置为在磁共振成像系统的大约磁共振频率下谐振的低剖面天线（34,102,202,302）。 大体上平面的电感器（110,112,210,240,310）与薄型天线电连接或耦合。 通常平面的电感器提供由低轮廓天线接收或由低轮廓天线发送的射频信号的选择的频率滤波。

公开(公告)号：US08154291B2

公开(公告)日：2012-04-10

申请号：US11843744

申请日：2007-08-23

申请人： Thomas Chmielewski ,  Brian J. Cohen ,  Yiping Guan

发明人： Thomas Chmielewski ,  Brian J. Cohen ,  Yiping Guan

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34053 ,  G01R33/3415 ,  G01R33/365

摘要： The present invention relates to an element configuration within an RF coil for use for MRI. The invention provides for an inherently electromagnetically decoupled solenoid element pair for receiving radio frequency magnetic resonance signals within a vertical field MRI system. The elements of the solenoid element pair described herein are typically positioned in a coplanar, side-by-side position. The decoupling of the solenoid pair can be accomplished through numerous methods including but not limited to an overlapping between the elements of the solenoid pair, use of a capacitor shared between the elements of the solenoid pair, or the use of overlapped inductors between the elements of the solenoid pair.

摘要翻译： 本发明涉及用于MRI的RF线圈内的元件结构。 本发明提供了用于在垂直场MRI系统内接收射频磁共振信号的固有的电磁去耦螺线管元件对。 这里描述的螺线管元件对的元件通常位于共面的并排位置。 螺线管对的解耦可以通过多种方法来实现，包括但不限于螺线管对的元件之间的重叠，螺线管对元件之间共用的电容器的使用，或者使用重叠的电感器 螺线管对。

公开(公告)号：US20090021261A1

公开(公告)日：2009-01-22

申请号：US10597018

申请日：2005-01-05

申请人： Thomas Chmielewski ,  William O. Braum ,  John T. Carlon

发明人： Thomas Chmielewski ,  William O. Braum ,  John T. Carlon

IPC分类号： G01R33/36

CPC分类号： G01R33/3685 ,  G01R33/34007 ,  G01R33/3628

摘要： A magnetic resonance imaging scanner (10) includes a main magnet (20) generating a spatially uniform main magnetic field at least over a field of view, a plurality of gradient coils (30) selectively generating magnetic field gradients at least over the field of view, and a radio frequency coil (32, 34) for performing at least one of exciting and detecting magnetic resonance at the selected resonance frequency in an imaging subject disposed in the field of view. A radio frequency trap (60, 60′) connected with the radio frequency coil (32, 34) includes helically grooved dielectric formers (62, 62) around which a coaxial cable (64) is wrapped. A plurality of electrically conductive tuning elements such as screws or rods (84, 90) are selectively inserted into the dielectric formers (62, 62) to tune the radio frequency trap (60, 60) to a selected resonance frequency by adjusting the inductance of the trap.

摘要翻译： 磁共振成像扫描仪（10）包括至少在视场上产生空间上均匀的主磁场的主磁体（20），多个梯度线圈（30）至少在视场上产生磁场梯度 以及射频线圈（32,34），用于在设置在视野中的成像对象中执行激励和检测在所选谐振频率处的磁共振中的至少一个。 与射频线圈（32,34）连接的射频陷波器（60,60'）包括螺旋沟槽电介质形成器（62,62），同轴电缆（64）绕其周围缠绕。 多个导电调谐元件（例如螺钉或杆（84,90））被选择性地插入到电介质成形器（62,62）中，以通过调节电感（60,60）来调谐射频陷波器（60,60）到所选择的谐振频率 陷阱。

公开(公告)号：US07288938B2

公开(公告)日：2007-10-30

申请号：US10560216

申请日：2004-05-28

申请人： Thomas Chmielewski ,  John T. Carlon

发明人： Thomas Chmielewski ,  John T. Carlon

IPC分类号： G01V3/00

CPC分类号： G01R33/34046

摘要： A split-top RF coil is provided. The split-top RF coil includes a first housing (80) having a first RF coil portion (41) disposed therein and a second housing (84) having a second RF coil portion (42) disposed therein. A plurality of slides (100) disposed on at least one of the housings and a plurality of slide tracks (101) are disposed the housing opposite the slides for receiving the slides. The first and second housings are mechanically coupled via the slides and slide tracks. The RF coil also includes a plurality of electric connector pins (110) disposed on at least one of the housings and a plurality of pin receivers (111) disposed on the housing opposite the pins for receiving the conductor pins. Electric connections between the first and second coil RF coil portions are made via the pins and receivers.

摘要翻译： 提供分体式射频线圈。 分体RF线圈包括具有设置在其中的第一RF线圈部分（41）的第一壳体（80）和设置在其中的具有第二RF线圈部分（42）的第二壳体（84）。 设置在至少一个壳体上的多个滑动件（100）和多个滑动轨道（101），其与滑块相对设置用于接收滑块。 第一和第二壳体通过滑块和滑动轨道机械耦合。 RF线圈还包括设置在至少一个壳体上的多个电连接器插脚（110）和设置在壳体上的与插脚相对的多个针式接收器（111），用于接收导体引脚。 第一和第二线圈RF线圈部分之间的电连接经由引脚和接收器进行。

公开(公告)号：US07180291B2

公开(公告)日：2007-02-20

申请号：US10536334

申请日：2003-11-25

申请人： Thomas Chmielewski ,  James A. Flock ,  Timothy Eagan

发明人： Thomas Chmielewski ,  James A. Flock ,  Timothy Eagan

IPC分类号： G01V3/00

CPC分类号： G01R33/34046

摘要： A birdcage coil (16) used in conjunction with a magnetic resonance imaging apparatus includes a first conductive loop (81, 581), a second conductive loop (82, 582), and a plurality of first conductor rungs (80, 580) disposed between the first and second conductive loops. A third conductor (83, 83″, 583) is coupled to the second conductive loop at resonance frequencies, such as by second conductor rungs (84, 84″, 584). The birdcage coil also includes switches (590) for switching the birdcage coil at least among: 1) an RF transmit mode to operate as an RF transmit coil; and 2) an RF receive mode to operate as an RF receive coil.

摘要翻译： 与磁共振成像装置结合使用的鸟笼线圈（16）包括第一导电回路（81,581），第二导电回路（82,582）和多个第一导体梯级（80,580） 第一和第二导电回路。 第三导体（83,83“，583）以共振频率，例如通过第二导体梯级（84,84”，584）耦合到第二导电回路。 鸟笼线圈还包括用于至少在以下各项之间切换鸟笼线圈的开关（590）：1）RF发射模式以用作RF发射线圈; 和2）用作RF接收线圈的射频接收模式。

公开(公告)号：US06414488B1

公开(公告)日：2002-07-02

申请号：US09516978

申请日：2000-03-01

申请人： Thomas Chmielewski

发明人： Thomas Chmielewski

IPC分类号： G01V300

CPC分类号： G01R33/3657

摘要： A magnetic resonance imaging apparatus creates images by exciting magnetic resonance in selected nuclei disposed within an image region. Through the image region a main magnetic field (B0) is applied and transverse gradients are produced. At selected times a high power RF pulse is applied to the imaging region causing the selected nuclei to resonate. These magnetic resonance signals are detected by a receive coil (D1, D2) and converted into an image representation viewable on a display (24). Images are obtained by repeating the transmit and receive portions until enough image data is received to produce an image. The receive coil (D1, D2) includes first decoupler circuits (28) arranged about the coil. During the transmit portion of the cycle, the decoupler circuits sense the high power RF pulse and decouple the coil. High speed switching diodes or PIN diodes are excited by the transmit RF pulse to switch inductors (40) into the coil to decouple the receive coil. During a receive portion of a cycle in which the coil is not used, a DC bias is selectively applied to the coil forcing the diodes on, actively decoupling the coil. The DC bias also biases a diode switch (50, 50′) to short the input of a preamplifier element (48, 48′) providing protection.

摘要翻译： 磁共振成像装置通过在设置在图像区域内的所选择的核中激发磁共振来产生图像。 通过图像区域施加主磁场（B0）并产生横向梯度。 在选定的时间，将高功率RF脉冲施加到成像区域，导致所选择的核谐振。 这些磁共振信号由接收线圈（D1，D2）检测并转换成可在显示器（24）上显示的图像表示。 通过重复发送和接收部分直到获得足够的图像数据以产生图像来获得图像。 接收线圈（D1，D2）包括绕线圈布置的第一去耦电路（28）。 在循环的发射部分期间，去耦电路感测高功率RF脉冲并使线圈解耦。 高速开关二极管或PIN二极管被发射RF脉冲激发，以将电感器（40）切换到线圈中以使接收线圈去耦。 在不使用线圈的周期的接收部分期间，选择性地将DC偏压施加到强制二极管的线圈上，主动地使线圈解耦。 DC偏压还偏置二极管开关（50,50'）以缩短提供保护的前置放大器元件（48,48'）的输入。

公开(公告)号：US20090164232A1

公开(公告)日：2009-06-25

申请号：US12174591

申请日：2008-07-16

申请人： Thomas Chmielewski ,  Denise James

发明人： Thomas Chmielewski ,  Denise James

IPC分类号： G06Q40/00

CPC分类号： G06Q40/02 ,  G06Q30/0185 ,  G06Q40/00 ,  G06Q40/025 ,  G06Q50/16 ,  G06Q50/18

摘要： Mortgage fraud detection systems and methods are provided. A fraud detection system can generally comprise a database operator, a database manager, one or more users, and a database. Database components can be implemented as hardware, software, or a combination of both. A fraud detection method can generally comprise providing a database for maintaining a plurality of records. Data records can be continually received by a database in batchwise or single submission protocols. Records can be compared to determine whether they contain common data in one or more predetermined fields. If records contain common data in one or more predetermined fields, records can be examined for inconsistencies in one or more other data fields. Discovered inconsistencies and magnitudes of inconsistencies can be warning signs of fraud. Results of comparisons can be reported to system users to enable such users to investigate additional circumstances. Other embodiments and features are also claimed and described in the application.

摘要翻译： 提供了抵押欺诈检测系统和方法。 欺诈检测系统通常可以包括数据库操作者，数据库管理器，一个或多个用户和数据库。 数据库组件可以实现为硬件，软件或两者的组合。 欺诈检测方法通常可以包括提供用于维护多个记录的数据库。 数据记录可以由数据库以分批或单次提交协议连续接收。 可以比较记录以确定它们是否在一个或多个预定字段中包含公共数据。 如果记录在一个或多个预定字段中包含公共数据，则可以检查记录以在一个或多个其他数据字段中的不一致性。 发现不一致和不一致的程度可能是欺诈的警告标志。 比较结果可以向系统用户报告，以使这些用户能够调查其他情况。 其他实施例和特征也在申请中被要求保护和描述。

公开(公告)号：US07235973B2

公开(公告)日：2007-06-26

申请号：US10553175

申请日：2004-04-02

申请人： Thomas Chmielewski ,  Shmaryu Shvartsman

发明人： Thomas Chmielewski ,  Shmaryu Shvartsman

IPC分类号： G01V3/00

CPC分类号： G01R33/3678 ,  G01R33/3415

摘要： A magnetic resonance imaging apparatus includes a main magnet (12) for generating a main magnetic field in an examination region (14), a plurality of gradient coils (22) for setting up magnetic field gradients in the main field, an RF transmit coil for transmitting RF signals into the examination region to excite magnetic resonance in a subject disposed therein, and an RF receive coil (16) for receiving RF signals from the subject. The RF receive coil includes a first loop (101) and a second loop (102), the first and second loops being disposed substantially in a similar plane (x-z). Also included is a signal combiner (120) for combining the signals received by the first and second loops in quadrature.

摘要翻译： 磁共振成像装置包括用于在检查区域（14）中产生主磁场的主磁体（12），用于在主场中设置磁场梯度的多个梯度线圈（22），用于在主场中设置磁场梯度的多个梯形线圈 将RF信号发送到检查区域以激发设置在其中的对象中的磁共振，以及用于从对象接收RF信号的RF接收线圈（16）。 RF接收线圈包括第一环（101）和第二环（102），第一和第二环基本上设置在类似的平面（x-z）中。 还包括一个信号组合器（120），用于组合由第一和第二循环以正交方式接收的信号。

公开(公告)号：US20060226840A1

公开(公告)日：2006-10-12

申请号：US10553175

申请日：2004-04-02

申请人： Thomas Chmielewski ,  Shmaryu Shvartsman

发明人： Thomas Chmielewski ,  Shmaryu Shvartsman

IPC分类号： G01V3/00

CPC分类号： G01R33/3678 ,  G01R33/3415

摘要： A magnetic resonance imaging apparatus includes a main magnet (12) for generating a main magnetic field in an examination region (14), a plurality of gradient coils (22) for setting up magnetic field gradients in the main field, an RF transmit coil for transmitting RF signals into the examination region to excite magnetic resonance in a subject disposed therein, and an RF receive coil (16) for receiving RF signals from the subject. The RF receive coil includes a first loop (101) and a second loop (102), the first and second loops being disposed substantially in a similar plane (x-z). Also included is a signal combiner (120) for combining the signals received by the first and second loops in quadrature.

摘要翻译： 磁共振成像装置包括用于在检查区域（14）中产生主磁场的主磁体（12），用于在主场中设置磁场梯度的多个梯度线圈（22），用于在主场中设置磁场梯度的多个梯形线圈 将RF信号发送到检查区域以激发设置在其中的对象中的磁共振，以及用于从对象接收RF信号的RF接收线圈（16）。 RF接收线圈包括第一环（101）和第二环（102），第一和第二环基本上设置在类似的平面（x-z）中。 还包括一个信号组合器（120），用于组合由第一和第二循环以正交方式接收的信号。

公开(公告)号：US20120229141A1

公开(公告)日：2012-09-13

申请号：US13407852

申请日：2012-02-29

申请人： Robert W. Brown ,  Yong Wu ,  Zhen Yao ,  Shmaryu Shvartsman ,  Thomas Chmielewski ,  Timothy Eagan

发明人： Robert W. Brown ,  Yong Wu ,  Zhen Yao ,  Shmaryu Shvartsman ,  Thomas Chmielewski ,  Timothy Eagan

IPC分类号： G01R33/422 ,  B26D5/00 ,  G06F17/50

CPC分类号： G01R33/422 ,  G01R33/341 ,  G01R33/385 ,  G01R33/4822 ,  G01R33/56518 ,  Y10T83/505

摘要： Radio frequency (RF) shields used with magnetic resonance imaging (MRI) apparatus may experience gradient field induced eddy currents and RF field induced eddy currents. These eddy currents can cause the RF shield to heat up at an undesirable rate. RF shields are designed to have a desired degree of RF shielding and a desired heating attribute. Design goals for RF shields include gradient field transparency and RF field opacity, both of which can be influenced by eddy currents. Example methods identify a gradient field that will induce eddy currents and identify an RF field that will induce eddy currents. If a region on the RF shield is identified where the desired heating attribute will not be achieved, then a pattern of axial cuts and azimuthal cuts can be made in the RF shield to reduce gradient eddy current heating in the RF shield while maintaining desired RF shielding.

摘要翻译： 与磁共振成像（MRI）装置一起使用的射频（RF）屏蔽可能会经历梯度场感应涡流和射频场感应涡流。 这些涡流可以使RF屏蔽以不期望的速率加热。 RF屏蔽被设计为具有期望的RF屏蔽程度和期望的加热属性。 RF屏蔽的设计目标包括梯度场透明度和RF场不透明度，这两者都可以受涡流影响。 示例性方法识别将引起涡流的梯度场，并识别将产生涡流的RF场。 如果RF屏蔽上的区域被识别出将不能实现所需的加热属性，则可以在RF屏蔽中进行轴向切割和方位切割的图案，以减少RF屏蔽中的梯度涡流加热，同时保持所需的RF屏蔽 。