公开(公告)号：US20160103867A1

公开(公告)日：2016-04-14

申请号：US14894758

申请日：2013-05-31

Applicant: Ihad Francis ILYASHALDAS ,  Paolo PAPOTTI ,  Xu CHU

Inventor： Paolo PAPOTTI ,  Xu CHU

IPC: G06F17/30

Abstract: Computer implemented methods for identifying denial constraints are provided herein. The denial constraints can be used with a database schema R. A predicate space P can be generated for an instance I in the schema R. An evidence set EviI can be generated. The evidence set EviI can include sets of satisfied predicates in the predicate space P for each instance I. A minimal set of predicates can be identified for the evidence set EviI. Valid denial constraints can be identified from the minimal set by inverting the predicates in the minimal set.

Abstract translation: 本文提供了用于识别拒绝约束的计算机实现方法。 拒绝约束可以与数据库模式R一起使用。可以为模式R中的实例I生成谓词空间P.可以生成证据集EviI。 证据集EviI可以包括每个实例I的谓词空间P中的满足谓词的集合。可以为证据集合EviI识别最小的谓词集合。 通过反转最小集中的谓词，可以从最小集合中识别有效的拒绝约束。

公开(公告)号：US20090128154A1

公开(公告)日：2009-05-21

申请号：US11940490

申请日：2007-11-15

Applicant: Xu Chu ,  Yunfeng Liu ,  Yudong Zhu

Inventor： Xu Chu ,  Yunfeng Liu ,  Yudong Zhu

IPC: G01R33/28

CPC classification number: G01R33/3415 ,  G01R33/3614

Abstract: An ultra low output impedance RF power amplifier for driving a multiple transmit coil Magnetic Resonance Imaging (MRI) system is described, comprising an output matching network with high power MOSFET operatively coupled to at least one transmit coil in the MRI system for a desired output power and impedance. This invention also describes a method for achieving decoupling using the RF power amplifier to drive at least one transmit coil.

Abstract translation: 描述了用于驱动多个发射线圈的超低输出阻抗RF功率放大器，其中包括具有高功率MOSFET的输出匹配网络，其操作地耦合到MRI系统中的至少一个发射线圈，用于期望的输出功率 和阻抗。 本发明还描述了一种使用RF功率放大器实现去耦的驱动至少一个发射线圈的方法。

公开(公告)号：US20120306494A1

公开(公告)日：2012-12-06

申请号：US13149760

申请日：2011-05-31

Applicant: Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

Inventor： Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

IPC: G01R33/44

CPC classification number: G01R33/3664 ,  G01R33/3415 ,  G01R33/4804 ,  G01R33/4808

Abstract: A system including a plurality of coil elements is provided. Each coil element is arranged with a first switch and a second switch. In a first mode, the first switch and the second switch are turned off to split each coil element into a first coil portion and a second coil portion, to transmit first radio frequency signals. In a second mode, the first switch and second switch are turned on to transform each coil element into a loop coil to simultaneously transmit or receive multiple second radio frequency signals.

Abstract translation: 提供一种包括多个线圈元件的系统。 每个线圈元件配置有第一开关和第二开关。 在第一模式中，关闭第一开关和第二开关，以将每个线圈元件分成第一线圈部分和第二线圈部分，以发射第一射频信号。 在第二模式中，第一开关和第二开关导通，以将每个线圈元件变换成环形线圈，以同时发送或接收多个第二射频信号。

公开(公告)号：US10649975B2

公开(公告)日：2020-05-12

申请号：US14894758

申请日：2013-05-31

Applicant: Ihab Francis Ilyas Kaldas ,  Paolo Papotti ,  Xu Chu

Inventor： Ihab Francis Ilyas Kaldas ,  Paolo Papotti ,  Xu Chu

IPC: G06F16/21 ,  G06F16/23 ,  G06F16/215

Abstract: Computer implemented methods for identifying denial constraints are provided herein. The denial constraints can be used with a database schema R. A predicate space P can be generated for an instance I in the schema R. An evidence set EviI can be generated. The evidence set EviI can include sets of satisfied predicates in the predicate space P for each instance I. A minimal set of predicates can be identified for the evidence set EviI. Valid denial constraints can be identified from the minimal set by inverting the predicates in the minimal set.

公开(公告)号：US09116214B2

公开(公告)日：2015-08-25

申请号：US13149760

申请日：2011-05-31

Applicant: Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

Inventor： Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

IPC: G01R33/3415 ,  G01R33/36 ,  G01R33/48

CPC classification number: G01R33/3664 ,  G01R33/3415 ,  G01R33/4804 ,  G01R33/4808

Abstract: A system including a plurality of coil elements is provided. Each coil element is arranged with a first switch and a second switch. In a first mode, the first switch and the second switch are turned off to split each coil element into a first upper coil portion and a second lower coil portion, to transmit first radio frequency signals. In a second mode, the first switch and second switch are turned on to transform each coil element into a loop coil to simultaneously transmit or receive multiple second radio frequency signals.

Abstract translation: 提供一种包括多个线圈元件的系统。 每个线圈元件配置有第一开关和第二开关。 在第一模式中，关闭第一开关和第二开关，以将每个线圈元件分成第一上线圈部分和第二下线圈部分，以发射第一射频信号。 在第二模式中，第一开关和第二开关导通，以将每个线圈元件变换成环形线圈，以同时发送或接收多个第二射频信号。

公开(公告)号：US20130147475A1

公开(公告)日：2013-06-13

申请号：US13314559

申请日：2011-12-08

Applicant: Xing YANG ,  Teck Beng Desmond YEO ,  Xu CHU ,  Thomas Kwok-Fah FOO

Inventor： Xing YANG ,  Teck Beng Desmond YEO ,  Xu CHU ,  Thomas Kwok-Fah FOO

IPC: G01R33/48 ,  G01R33/385

CPC classification number: G01R33/34046 ,  A61B2090/374 ,  A61N5/025 ,  G01R33/3453 ,  G01R33/4808 ,  G01R33/5611

Abstract: A multi-channel coil assembly capable of being configured to operate in a first mode and a second mode is provided. The multi-channel coil assembly includes a plurality of coil elements and a plurality of mode switches. Each of the plurality of mode switches is switchably coupled to at least two of the coil elements. In the first mode, at least one of the mode switches is uncoupled to the coil elements forming a hyperthermia array. The hyperthermia array is configured to transmit first radio frequency signals in response to multiple first input signals supplied thereto. In the second mode, at least one of the mode switches is coupled to the coil elements forming a magnetic resonance (MR) array. The MR array is configured to transmit or receive second radio frequency signals in response to multiple second input signals supplied thereto.

Abstract translation: 提供能够被配置为在第一模式和第二模式下操作的多通道线圈组件。 多通道线圈组件包括多个线圈元件和多个模式开关。 多个模式开关中的每一个可切换地耦合到至少两个线圈元件。 在第一模式中，至少一个模式开关与形成高热阵列的线圈元件分离。 热疗阵列被配置为响应于提供给其的多个第一输入信号来发送第一射频信号。 在第二模式中，模式开关中的至少一个耦合到形成磁共振（MR）阵列的线圈元件。 MR阵列被配置为响应于提供给它的多个第二输入信号来发送或接收第二射频信号。

公开(公告)号：US07616000B2

公开(公告)日：2009-11-10

申请号：US11940490

申请日：2007-11-15

Applicant: Xu Chu ,  Yunfeng Liu ,  Yudong Zhu

Inventor： Xu Chu ,  Yunfeng Liu ,  Yudong Zhu

IPC: G01V3/00

CPC classification number: G01R33/3415 ,  G01R33/3614

Abstract: An ultra low output impedance RF power amplifier for driving a multiple transmit coil Magnetic Resonance Imaging (MRI) system is described, comprising an output matching network with high power MOSFET operatively coupled to at least one transmit coil in the MRI system for a desired output power and impedance. This invention also describes a method for achieving decoupling using the RF power amplifier to drive at least one transmit coil.

Abstract translation: 描述了用于驱动多个发射线圈的超低输出阻抗RF功率放大器，其中包括具有高功率MOSFET的输出匹配网络，其操作地耦合到MRI系统中的至少一个发射线圈，用于期望的输出功率 和阻抗。 本发明还描述了一种使用RF功率放大器实现去耦的驱动至少一个发射线圈的方法。