公开(公告)号：US06677755B2

公开(公告)日：2004-01-13

申请号：US10260787

申请日：2002-09-30

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 circuit for selectively disabling and enabling n-coils includes n-drivers disposed in a totem-pole configuration. Each of the n-drivers includes two FETs whose gates connect at a common node therefor. 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 FET thereof and deactivating the other FET thereof drawing current away from and thus disabling its corresponding coil and allowing current to flow through the one FET 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 FET thereof and activating the other FET thereof thereby allowing current to flow serially through its corresponding coil and the other FET 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线圈的电路包括以图腾柱配置布置的n驱动器。 n个驱动器中的每一个包括两个FET，其栅极连接在公共节点处。 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FET并使其他FET拉动电流远离其并因此使其相应线圈 并且允许电流流过该一个FET，因此可以作为n个驱动器中的连续一个的电流源，以及（ii）通过去激活其一个FET并激活另一个FET从而允许电流的线圈使能信号 串联流过其相应的线圈和另一个FET，从而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：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：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.