公开(公告)号：US07221159B2

公开(公告)日：2007-05-22

申请号：US10064846

申请日：2002-08-22

申请人： David M. Griffiths ,  George J. Misic ,  William J. Monski ,  Mo Shuen Ng ,  John A. Brosovich

发明人： David M. Griffiths ,  George J. Misic ,  William J. Monski ,  Mo Shuen Ng ,  John A. Brosovich

IPC分类号： G01V3/00

CPC分类号： G01R33/283 ,  A61B5/0017 ,  A61B5/002 ,  A61B5/055

摘要： An antenna coupling enables communication across a barrier to radio frequencies. The antenna coupling comprises first and second antennas. The first antenna is adapted for positioning on a first side of the barrier, and is capable of receiving from and transmitting to a first transceiver disposed on the first side. The second antenna is adapted for positioning on a second side of the barrier, and is capable of receiving from and transmitting to a second transceiver on the second side. The interconnection of the first and second antennas through the barrier comprises the antenna coupling. The antenna coupling enables the first and second transceivers to communicate across the barrier over the desired range(s) of radio frequencies. In a related aspect, the antenna coupling may also include a filter interconnected between the first and second antennas to prevent radio frequencies outside of the desired range(s) from being transmitted across the barrier.

摘要翻译： 天线耦合使得能够跨屏障到无线电频率的通信。 天线耦合包括第一和第二天线。 第一天线适于定位在屏障的第一侧上，并且能够从设置在第一侧的第一收发机接收和发送。 第二天线适于定位在屏障的第二侧上，并且能够从第二侧接收和发送到第二收发器。 通过屏障的第一和第二天线的互连包括天线耦合。 天线耦合使得第一和第二收发器能够在无线电频率的期望范围内跨越屏障通信。 在相关方面，天线耦合还可以包括在第一和第二天线之间互连的滤波器，以防止在期望范围之外的无线电频率穿过屏障传输。

公开(公告)号：US07012430B2

公开(公告)日：2006-03-14

申请号：US10714509

申请日：2003-11-14

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01V3/00

CPC分类号： G01R33/3415

摘要： A phased array coil system is presented for use with a magnetic resonance system. The phased array coil system includes a first coil, a second coil, and an interface subsystem. The first coil defines a first region and the second coil defines a second region, with the first coil partially overlapping the second coil to define an overlap region formed by the intersection of the first and second region. Operably connected with the first and second coils, the interface subsystem includes (i) a power splitter for splitting radio frequency (RF) power for delivery to the first and second coils and (ii) a phase compensator for adjusting the phase relationship of the RF power delivered to the first and second coils so that a magnetic field produced thereby in the overlap region is approximately equal to that produced near the center of each of the first and second regions.

摘要翻译： 提出了一种用于磁共振系统的相控阵列线圈系统。 相控阵线圈系统包括第一线圈，第二线圈和接口子系统。 第一线圈限定第一区域，第二线圈限定第二区域，其中第一线圈部分地与第二线圈重叠以限定由第一和第二区域的相交形成的重叠区域。 接口子系统与第一和第二线圈可操作地连接，包括：（i）功率分配器，用于分离射频（RF）功率以传送到第一和第二线圈;以及（ii）相位补偿器，用于调整RF 输送到第一和第二线圈的功率使得在重叠区域中产生的磁场大致等于在第一和第二区域中的每一个附近产生的磁场。

公开(公告)号：US06798206B2

公开(公告)日：2004-09-28

申请号：US10178594

申请日：2002-06-24

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01V300

CPC分类号： G01R33/3664 ,  G01R33/3415 ,  G01R33/3678

摘要： A coil interface allows a neurovascular coil system to be coupled to a magnetic resonance (MR) system. The neurovascular coil system has an array of coils including a birdcage coil, at least one spine coil, and at least one neck coil, with the MR system being equipped with a number of receivers. The coil interface includes a plurality of input ports, a plurality of output ports, and an interface circuit. The plurality of input ports are for coupling to the coils of the neruovascular coil system, and the plurality of output ports for coupling to the receivers of the MR system. The interface circuit enables the input ports and the output ports to be selectively interconnected, and thereby enables the neurovascular coil system to be selectively operated in (I) a neurovascular mode; (II) a high resolution brain mode; (III) a high speed brain mode; (IV) a high resolution brain and c-spine mode; (V) a cervical spine mode; and (VI) a volume neck mode.

摘要翻译： 线圈接口允许神经血管线圈系统耦合到磁共振（MR）系统。 神经血管线圈系统具有包括鸟笼线圈，至少一个脊线圈和至少一个颈线圈的线圈阵列，MR系统配备有多个接收器。 线圈接口包括多个输入端口，多个输出端口和接口电路。 多个输入端口用于耦合到神经血管线圈系统的线圈，以及用于耦合到MR系统的接收器的多个输出端口。 接口电路使得输入端口和输出端口能够选择性地互连，从而使神经血管线圈系统能够以（I）神经血管模式选择性地操作; （二）高分辨率脑模式; （三）高速脑模式; （四）高分辨脑脑脊柱模式; （五）颈椎模式; 和（VI）体积颈部模式。

公开(公告)号：US06356081B1

公开(公告)日：2002-03-12

申请号：US09449255

申请日：1999-11-24

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01V300

CPC分类号： G01R33/3664 ,  G01R33/3415 ,  G01R33/3678

摘要： A coil interface for coupling a phased array magnetic resonance imaging coil to a magnetic resonance imaging system. The coil interface includes a plurality of signal inputs and a plurality of output ports. Each of the output ports is associated with a receiver in the magnetic resonance imaging system. The coil interface also includes an interface circuit. The interface circuit selectively couples at least two of the signal inputs to at least one of the plurality of input ports. Where the coil is a quadrature phased array coil, a preferred embodiment allows the two quadrature signals to be acquired as a single signal, precombined at the RF level within the coil interface, or as two separate RF signals by two of the receivers of the magnetic resonance imaging system hardware.

摘要翻译： 用于将相控阵磁共振成像线圈耦合到磁共振成像系统的线圈接口。 线圈接口包括多个信号输入和多个输出端口。 每个输出端口与磁共振成像系统中的接收器相关联。 线圈接口还包括接口电路。 接口电路将至少两个信号输入选择性地耦合到多个输入端口中的至少一个。 在线圈是正交相控阵线圈的情况下，优选实施例允许将两个正交信号作为在线圈接口内的RF电平预组合的单个信号获取，或者作为两个分离的RF信号由两个磁体的接收器 共振成像系统硬件。

公开(公告)号：US5610520A

公开(公告)日：1997-03-11

申请号：US201862

申请日：1994-02-24

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01R33/341 ,  G01V3/00 ,  G01V3/14

CPC分类号： G01R33/3678

摘要： An MRI/MRS magnetic coil system is disclosed wherein the isolation between the coils can be adjusted to decrease or virtually eliminate the coupling between quadrature magnetic resonance imaging coils in order to optimize orthogonality between the coils. The adjustment allows the use of flexible coils which may be conformed to image specific anatomical regions. The RF characteristics of the coils are controlled by variable capacitors. The capacitors are controlled by a remote automatic controller which functions to adjust the RF characteristics of the coils until an optimal orthogonality and signal to noise ratio is achieved between and by the coils.

摘要翻译： 公开了一种MRI / MRS电磁线圈系统，其中可以调节线圈之间的隔离以减少或实际上消除正交磁共振成像线圈之间的耦合，以便优化线圈之间的正交性。 该调整允许使用可以符合图像特定解剖区域的柔性线圈。 线圈的RF特性由可变电容器控制。 电容器由远程自动控制器控制，该控制器用于调节线圈的RF特性，直到在线圈之间和线圈之间实现最佳的正交性和信噪比。

公开(公告)号：US4764726A

公开(公告)日：1988-08-16

申请号：US903983

申请日：1986-09-05

申请人： George J. Misic ,  Paul T. Orlando

发明人： George J. Misic ,  Paul T. Orlando

IPC分类号： G01R33/341 ,  G01R33/36 ,  G01R33/20

CPC分类号： G01R33/3678 ,  G01R33/3621 ,  G01R33/3614

摘要： During a transmit cycle portion, a radio frequency transmitter (C) continuously generates an AC biasing signal and selectively generates a radio frequency signal. The AC biasing signal gates a first switch (10) and a second switch (32) such that the radio frequency signals from the transmitter are conducted to a magnetic resonance probe (E) but are blocked from being conducted to a receiver (F). A first filter (20) prevents the bias signals from being applied to the probe. The second switch includes a pair of crossed diodes (34, 36) which are gated conductive by the AC bias signal. A filter (72) passes the radio frequency signals but not the bias signals to ground to prevent the radio frequency signals from reaching the receiver. A filter (80) allows the bias signals to be applied across a load (88) such that the transmitter sees the load at the bias signal frequency. Another filter (40) prevents the bias signal from reaching the transmitter. An additional switch (50) provides further isolation between the receiver and the transmitter during the transmit cycle portion. During the receive cycle portion, radio frequency signals received by the probe pass through the filters (20,40) directly to the receiver but are blocked by switch (10) from passing to the transmitter.

摘要翻译： 在发射周期部分期间，射频发射机（C）连续产生AC偏置信号，并选择性地产生射频信号。 AC偏置信号将第一开关（10）和第二开关（32）置入门限，使得来自发射器的射频信号被传导到磁共振探头（E），但被阻止不被传导到接收器（F）。 第一滤波器（20）防止偏置信号被施加到探头。 第二开关包括一对交流二极管（34,36），它们被交流偏压信号门控导通。 滤波器（72）将射频信号而不是偏置信号传递到地，以防止射频信号到达接收机。 滤波器（80）允许跨越负载（88）施加偏置信号，使得发射器以偏置信号频率看到负载。 另一个滤波器（40）防止偏置信号到达发射器。 附加开关（50）在发射周期部分期间在接收器和发射器之间提供进一步的隔离。 在接收周期部分期间，由探头接收的射频信号直接通过滤波器（20,40）到接收器，但是由开关（10）阻止传送到发射机。

公开(公告)号：US07508214B2

公开(公告)日：2009-03-24

申请号：US11751115

申请日：2007-05-21

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/288

摘要： Systems and methods for the selection of and application of RF power to a plurality of transmit and/or transmit/receive coil elements to decrease patient SAR and to limit the potential for artifact problems. Without any change to the hardware or software of an MR scanner, the present local coil system provides system logic and coil design flexibility such that only transmit coil elements that are required for a particular portion of an MR scan will be utilized at that time. The local coil system may include any combination of transmit-only, receive-only and transmit/receive coil elements as part of the coil system (array of coil elements). The logic controller of the local coil system gathers input data from the MR scanner, from the attached coil elements and optionally from one or more sensors attached to the coil system itself.

摘要翻译： 用于选择和应用RF功率到多个发射和/或发射/接收线圈元件以降低患者SAR并限制伪影问题潜力的系统和方法。 本发明的本地线圈系统不对MR扫描器的硬件或软件进行任何改变，从而提供了系统逻辑和线圈设计灵活性，使得仅在MR扫描的特定部分所需的传输线圈元件将被利用。 本地线圈系统可以包括作为线圈系统（线圈元件阵列）的一部分的仅发射，仅接收线圈和发射/接收线圈元件的组合。 局部线圈系统的逻辑控制器从MR扫描器收集来自连接的线圈元件的输入数据，并且可选地从连接到线圈系统本身的一个或多个传感器收集输入数据。

公开(公告)号：US20080086050A1

公开(公告)日：2008-04-10

申请号：US11868552

申请日：2007-10-08

申请人： George J. Misic ,  Alan D. Hirschman

发明人： George J. Misic ,  Alan D. Hirschman

IPC分类号： A61B5/05

CPC分类号： A61B5/055 ,  A61B18/12 ,  A61B2018/0016 ,  A61B2018/183 ,  A61B2090/374 ,  G01R33/34084 ,  G01R33/4804

摘要： Hyperthermia has been applied by, for example, separate ultrasound transducers, RF or microwave transmitters and heated fluids. Imaging by separate MRI imaging coils is usually used to view the anatomical region under treatment. Separate temperature probes (needles, catheters) are often used to monitor tissue temperature. Control of the temperature profile required for effective hyperthermia treatment is usually done by trial and error, involving a human operator. The present invention combines all of these capabilities into a single device, which is MRI compatible and safe. It also allows for automatic control of the RF energy to achieve a prescribed tissue hyperthermia.

摘要翻译： 已经通过例如单独的超声换能器，RF或微波发射器和加热流体应用了热疗。 单独MRI成像线圈的成像通常用于观察治疗前的解剖区域。 单独的温度探针（针，导管）通常用于监测组织温度。 控制有效热疗治疗所需的温度曲线通常是通过试验和错误的方式进行的，涉及人类操作者。 本发明将所有这些功能组合成单个设备，其是MRI兼容且安全的。 它还允许自动控制RF能量以实现规定的组织热疗。

公开(公告)号：US06831460B2

公开(公告)日：2004-12-14

申请号：US10068300

申请日：2002-02-05

申请人： Theodore J. Reisker ,  William J. Monski ,  Eric D. Reid ,  George J. Misic

发明人： Theodore J. Reisker ,  William J. Monski ,  Eric D. Reid ,  George J. Misic

IPC分类号： G01V300

CPC分类号： G01R33/34046

摘要： A coil for creating improved homogeneity in magnetic flux density in a radio frequency resonator for magnetic resonance imaging and spectroscopy of the human head. The coil has a plurality of conductive members. Each of the conductive members has a linear portion and a tapered portion. The conductive members are arranged to form a first opening having a first diameter and a second opening having a second diameter, with the second diameter being different from the first diameter. The tapered portions of the conductive members provide the coil with a substantially homogeneous pattern of magnetic flux density in at least one of three orthogonal imaging planes of the coil.

摘要翻译： 一种线圈，用于在用于磁共振成像和人头的光谱的射频谐振器中产生改善的磁通密度均匀性。 线圈具有多个导电构件。 每个导电构件具有直线部分和锥形部分。 导电构件布置成形成具有第一直径的第一开口和具有第二直径的第二开口，第二直径不同于第一直径。 导电构件的锥形部分在线圈的三个正交成像平面中的至少一个中为线圈提供基本均匀的磁通密度图案。

公开(公告)号：US06714013B2

公开(公告)日：2004-03-30

申请号：US10151491

申请日：2002-05-20

申请人： George J. Misic

发明人： George J. Misic

IPC分类号： G01N300

CPC分类号： G01R33/3415

摘要： A magnetic resonance imaging receiver/transmitter coil system for providing images for regions of interest includes a first phased array formed of a plurality of electrically conductive members and defining an array volume and a second phased array formed of a second plurality of electrically conductive members and disposed at least partially within the defined array volume. At least one of the first and second phased arrays is adapted to apply a magnetic field to the defined array volume. At least one of the first and second phased arrays is further adapted to receive said applied magnetic field. The first phased array is extendible to define a further array volume and is provided with a switch for electrically coupling and decoupling an extension to effectively extend the length of the first phased array and thereby define the further array volume. In this manner the length of the first phased array is effectively extended to approximately twice its unextended length.

摘要翻译： 用于为感兴趣区域提供图像的磁共振成像接收器/发射器线圈系统包括由多个导电构件形成并限定阵列体积的第一相控阵列和由第二多个导电构件形成的第二相控阵列， 至少部分地在定义的阵列卷内。 第一和第二相控阵列中的至少一个适于将磁场施加到限定的阵列体积。 所述第一和第二相控阵列中的至少一个进一步适于接收所述施加的磁场。 第一相控阵可扩展以限定另一个阵列体积，并设置有用于电耦合和解耦延伸的开关，以有效地延长第一相控阵列的长度，从而限定另外的阵列体积。 以这种方式，第一相控阵列的长度有效地延伸到其未延伸长度的大约两倍。