公开(公告)号：US06888351B2

公开(公告)日：2005-05-03

申请号：US10610250

申请日：2003-06-30

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral

IPC分类号： G01R33/3415 ,  G01V3/00

CPC分类号： G01R33/3415

摘要： A coil interface is capable of coupling an array of coils to a magnetic resonance (MR) system. The MR system is equipped with a predetermined number of receivers. The coil interface includes a plurality of input ports, a plurality of output ports, and an interface circuit disposed therebetween. The plurality of input ports is used to couple the interface circuit to the coils of the array. The plurality of output ports is used to couple the interface circuit to the receivers of the MR system. The interface circuit is used to selectively interconnect at least two of the input ports to at least one of the output ports, thereby allowing the array of coils to be selectively operated in any one of a plurality of operational modes.

摘要翻译： 线圈接口能够将线圈阵列耦合到磁共振（MR）系统。 MR系统配备有预定数量的接收器。 线圈接口包括多个输入端口，多个输出端口以及设置在其间的接口电路。 多个输入端口用于将接口电路耦合到阵列的线圈。 多个输出端口用于将接口电路耦合到MR系统的接收器。 接口电路用于选择性地将至少两个输入端口互连到至少一个输出端口，从而允许线圈阵列以多种操作模式中的任何一种选择性地操作。

公开(公告)号：US4436093A

公开(公告)日：1984-03-13

申请号：US425223

申请日：1982-09-28

申请人： Kenneth W. Belt

发明人： Kenneth W. Belt

IPC分类号： A61N1/365 ,  A61N1/37 ,  A61N1/36

CPC分类号： A61N1/365 ,  A61N1/3718 ,  Y10S128/901

摘要： A battery powered external pacer operable in fixed-rate and demand modes includes a sense amplifier having an active notch filter system for attenuating power line interference. The filter system comprises four separate data channels each including a transmission gate synchronously driven by pacer clock pulses for frequency stability. Charges developed on capacitors in each data channel are summed by an output capacitor to avoid the need for amplifiers in each channel. A detector having two comparators for detecting positive and negative directed R-wave components derives heart pulses from the amplified signal. A pulse-driven reference supply having very low power consumption provides operating bias required by the detector. A battery monitor having a single comparator simultaneously monitors supply voltage for low and unusable voltage levels.

摘要翻译： 以固定速率和需求模式操作的电池供电的外部起搏器包括具有用于衰减电力线干扰的有源陷波滤波器系统的读出放大器。 滤波器系统包括四个单独的数据通道，每个数据通道包括由用于频率稳定性的起搏器时钟脉冲同步驱动的传输门。 在每个数据通道中的电容器上开发的电荷由输出电容器相加，以避免每个通道中的放大器的需要。 具有用于检测正向和负向的R波分量的两个比较器的检测器从放大的信号中导出心脏脉冲。 具有极低功耗的脉冲驱动参考电源提供了检测器所需的工作偏压。 具有单个比较器的电池监视器同时监视低电压和不可用电压电平的电源电压。

公开(公告)号：US07141980B2

公开(公告)日：2006-11-28

申请号：US10993227

申请日：2004-11-19

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

IPC分类号： G01V3/00

CPC分类号： G01R33/3415

摘要： An apparatus for enabling operation of adjacent coil loops with a magnetic resonance system. The apparatus includes a correction network interconnecting the coil loops for enabling both concurrent and separate operation of the coil loops. The correction network includes an input network for each coil loop and an isolation circuit. Each input network includes a balun and an active decoupling circuit for interconnecting the coil loop and balun. The balun links the input network to the MR system. The active decoupling circuits are capable of being (A) activated concurrently thereby disabling both loops during the transmit cycle, (B) deactivated concurrently thereby enabling each loop to receive MR signals during the receive cycle and (C) deactivated/activated separately thereby enabling either one but not both loops to receive MR signals during the receive cycle. The isolation circuit interconnects the loops for substantially canceling mutual inductance between them while they are enabled concurrently.

摘要翻译： 一种用于使得能够利用磁共振系统操作相邻线圈的装置。 该装置包括校正网络，其互连线圈环，以实现线圈回路的并行和分离操作。 校正网络包括用于每个线圈回路的输入网络和隔离电路。 每个输入网络包括平衡 - 不平衡变换器和用于互连线圈回路和平衡 - 不平衡转换器的有源去耦电路。 平衡 - 不平衡变换器将输入网络连接到MR系统。 主动解耦电路能够（A）同时激活，从而在发射周期期间禁用两个环路，（B）同时去激活，从而使得每个环路在接收周期期间接收MR信号，并且（C）分别去激活/激活，从而使 一个但不是两个环路以在接收周期期间接收MR信号。 隔离电路将环路互连，以便在它们同时使能的同时基本上消除它们之间的互感。

公开(公告)号：US06714012B2

公开(公告)日：2004-03-30

申请号：US10015190

申请日：2001-11-26

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

IPC分类号： G01V300

CPC分类号： G01R33/3415

摘要： An apparatus enables a patient to be positioned optimally for a scanning procedure during which images are to be obtained of the vasculature of the patient. The apparatus includes a lumbar support, a tray, and a leg support. The lumbar support allows the renal portion of the vasculature to be positioned predominately in a single plane. The tray allows the pelvic and femoral portions of the vasculature to be positioned substantially coplanar with each other and with the renal portion of the vasculature. The leg support allows the lower leg and feet portions of the vasculature to be positioned substantially coplanar with each other and with the pelvic and femoral portions of the vasculature. The substantial coplanar alignment of the portions of the vasculature enables the images thereof to be obtained with a smaller field of view and thus at least one of greater resolution and reduced scanning time.

摘要翻译： 一种装置使患者能够最佳地定位用于获得患者脉管系统的图像的扫描过程。 该装置包括腰部支撑件，托盘和腿部支撑件。 腰椎支撑允许脉管系统的肾部分主要位于单个平面中。 托盘允许脉管系统的骨盆和股骨部分彼此基本共面并且与脉管系统的肾部分定位。 腿支撑允许脉管系统的小腿和脚部分彼此基本共面并且与脉管系统的骨盆和股骨部分基本共面。 脉管系统部分的基本共面对准使得能够以更小的视场获得图像，并因此获得更高的分辨率和减少的扫描时间中的至少一个。

公开(公告)号：US4585001A

公开(公告)日：1986-04-29

申请号：US573149

申请日：1984-01-23

申请人： Kenneth W. Belt

发明人： Kenneth W. Belt

IPC分类号： A61N1/365 ,  A61N1/37 ,  A61N1/36

CPC分类号： A61N1/365 ,  A61N1/3718

摘要： A battery powered external pacer operable in fixed-rate and demand modes includes a sense amplifier having an active notch filter system for attenuating power line interference. The filter system comprises four separate data channels each including a transmission gate synchronously driven by pacer clock pulses for frequency stability. Charges developed on capacitors in each data channel are summed by an output capacitor to avoid the need for amplifiers in each channel. A detector having two comparators for detecting positive and negative directed R-wave components derives heart pulses from the amplified signal. A pulse-driven reference supply having very low power consumption provides operating bias required by the detector. A battery monitor having a single comparator simultaneously monitors supply voltage for low and unusable voltage levels.

摘要翻译： 以固定速率和需求模式操作的电池供电的外部起搏器包括具有用于衰减电力线干扰的有源陷波滤波器系统的读出放大器。 滤波器系统包括四个单独的数据通道，每个数据通道包括由用于频率稳定性的起搏器时钟脉冲同步驱动的传输门。 在每个数据通道中的电容器上开发的电荷由输出电容器相加，以避免每个通道中的放大器的需要。 具有用于检测正向和负向的R波分量的两个比较器的检测器从放大的信号中导出心脏脉冲。 具有极低功耗的脉冲驱动参考电源提供了检测器所需的工作偏压。 具有单个比较器的电池监视器同时监视低电压和不可用电压电平的电源电压。

公开(公告)号：US06897658B2

公开(公告)日：2005-05-24

申请号：US10610471

申请日：2003-06-30

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral

IPC分类号： G01R33/3415 ,  G01V3/00

CPC分类号： G01R33/3415

摘要： A circuit for selectively disabling and enabling n-coils includes n-drivers in a totem-pole configuration. Each of the n-drivers includes two transistors whose control terminals connect at a common node. Each n-driver is used to operate one of the n-coils by being responsive at its common node to (i) a coil disable signal by activating one transistor thereof and deactivating the other transistor thereof thereby drawing current away from and thus disabling its corresponding coil and allowing current to flow through the one transistor and thus be available as a source of current to a successive one of the n-drivers and (ii) a coil enable signal by deactivating the one transistor thereof and activating the other transistor thereof thereby allowing current to flow serially through its corresponding coil and the other transistor thus enabling its corresponding coil and to be available as a source of current to the successive n-driver.

摘要翻译： 用于选择性地禁用和使能n线圈的电路包括图腾柱配置中的n驱动器。 每个n驱动器包括两个晶体管，其控制端在公共节点处连接。 每个n驱动器用于通过在其公共节点处响应来操作n个线圈中的一个，以（i）通过激活其一个晶体管的线圈禁用信号并使其另一个晶体管去激活，从而使电流远离并因此使其相应的 线圈并且允许电流流过一个晶体管，因此可以作为n驱动器中的连续一个的电流源，以及（ii）通过使其一个晶体管去激活并激活其它晶体管的线圈使能信号从而允许 电流串联流过其对应的线圈，而另一个晶体管因此使其相应的线圈能够作为到连续n驱动器的电流源。

公开(公告)号：US06737866B2

公开(公告)日：2004-05-18

申请号：US10254235

申请日：2002-09-25

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

IPC分类号： G01V300

CPC分类号： G01R33/3415

摘要： A method is provided for imaging a vasculature of a patient using an MRI system with an array of local coils. The method includes thestep of providing a housig by which (I) a first plurality of the coils is arrayed along an anterior surface of the patient, (II) a second plurality of the coils is arrayed along a posterior surface of the patient, and (III) the patient is oriented such that portions of the vasculature between and including the renal and feet portions thereof are aligned substantially coplanarly. The method also includes the step of injecting a contrast agent into the patient. The method further involves acquiring images of the vasculature from approximately the renal portion thereof to an including the feet portion thereof so that the images of the portions of the vasculature are acquired successively in timed relation to a progression of the contrast agent therethrough.

摘要翻译： 提供了一种用于使用具有局部线圈阵列的MRI系统对患者脉管系统进行成像的方法。 该方法包括提供壳体的步骤，其中（I）沿着患者的前表面排列第一组线圈，（II）沿着患者的后表面排列第二组线圈，以及 （III），患者被定向成使得在其和肾脏部分之间并包括肾和脚部分的脉管系统的部分基本上共面对齐。 该方法还包括将造影剂注射到患者体内的步骤。 该方法还包括从其大约肾部分获取脉管系统的图像以包括其脚部分，使得脉冲系统的部分的图像以与造影剂通过的进程定时关系连续获取。

公开(公告)号：US06323648B1

公开(公告)日：2001-11-27

申请号：US08978718

申请日：1997-11-26

申请人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

发明人： Kenneth W. Belt ,  Michael Reichel ,  J. Michael Watral ,  Stanley R. Lewandowski ,  Bradley J. Adams ,  Lisa A. Augustine ,  Robert S. Bell, Jr.

IPC分类号： G01V300

CPC分类号： G01R33/3415

摘要： An interface that couples a surface coil array having N receiving elements to an NMR scanner having M preamplifier inputs. The interface includes an RF switch array and a transmit/receive bias circuit. The RF switch array and the transmit/receive bias circuit are controlled by a control logic circuit. In response to a predetermined input, the control logic circuit causes a predetermined subset of the N receiving elements to be couple to the preamplifier inputs of the NMR scanner. Preferably, N may be larger than M.

摘要翻译： 将具有N个接收元件的表面线圈阵列耦合到具有M个前置放大器输入的NMR扫描器的接口。 该接口包括RF开关阵列和发射/接收偏置电路。 RF开关阵列和发射/接收偏置电路由控制逻辑电路控制。 响应于预定输入，控制逻辑电路使N个接收元件的预定子集耦合到NMR扫描器的前置放大器输入端。 优选地，N可以大于M.

公开(公告)号：US4107613A

公开(公告)日：1978-08-15

申请号：US767972

申请日：1977-02-11

申请人： Daniel L. Queen ,  Kenneth W. Belt

发明人： Daniel L. Queen ,  Kenneth W. Belt

IPC分类号： H03G3/34 ,  H04B1/10

CPC分类号： H03G3/341 ,  H04B1/10

摘要： A wireless microphone and receiver in which the receiver output is muted whenever there is insufficient carrier present at the receiver to provide a clear noise free recovered audio or when there is radio frequency interference of a nature in strength to cause amplitude modulation on the IF envelope at the input to the FM detector. The invention places the receiver into a sampling mode whenever it is in a muted condition to conserve batteries and to provide a visual indication of such condition.

摘要翻译： 一种无线麦克风和接收器，其中当接收机上存在不足的载波时，接收机输出静音，以提供清晰的无噪声的恢复音频，或者当存在强度性质的射频干扰以使IF信号上的幅度调制在 输入到FM检测器。 本发明只要处于静音状态以便节省电池并提供这种状况的视觉指示，则将接收机置于采样模式。

公开(公告)号：US06747454B2

公开(公告)日：2004-06-08

申请号：US10252196

申请日：2002-09-23

申请人： Kenneth W. Belt

发明人： Kenneth W. Belt

IPC分类号： G01V300

CPC分类号： G01R33/3415

摘要： An array of coils is configured for use in imaging the vasculature of a patient. The array of coils comprises first and second pluralities of coil pairs for deployment longitudinally along anterior and posterior surfaces, respectively, of the patient. In the first plurality, each coil pair has first and second loops positioned laterally about right and left sides, respectively, of the anterior surface for receiving therefrom magnetic resonance signals. In the second plurality, each coil pair has first and second loops positioned laterally about right and left sides, respectively, of the posterior surface for receiving therefrom magnetic resonance signals. Means are provided for laterally isolating the first and second loops relative to each other for each coil pair. Means are provided for longitudinally isolating the coil pairs relative to each other. Means also vertically isolate the coil pairs of the first plurality from those of the second plurality.

摘要翻译： 一组线圈被配置用于对患者的脉管系统进行成像。 线圈阵列包括分别沿患者的前表面和后表面纵向展开的第一和第二多个线圈对。 在第一组中，每个线圈对具有分别位于前表面的左右两侧的第一和第二回路，用于从其接收磁共振信号。 在第二多个中，每个线圈对具有分别位于后表面的左右两侧的第一和第二回路，用于从其接收磁共振信号。 提供了用于每个线圈对相对于彼此横向隔离第一和第二回路的装置。 提供了用于相对于彼此纵向隔离线圈对的装置。 装置还将第一多个的线圈对与第二个的线圈对垂直隔离。