中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.011 seconds)

    RF TRANSMITTER WITH DIGITAL FEEDBACK FOR MRI
    2.
    发明申请
    RF TRANSMITTER WITH DIGITAL FEEDBACK FOR MRI 审中-公开
    射频发射机与数字反馈用于MRI

    公开(公告)号：WO2008135872A1

    公开(公告)日：2008-11-13

    申请号：PCT/IB2008/051253

    申请日：2008-04-03

    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  GRAESSLIN, Ingmar ,  VERNICKEL, Peter ,  DEN BOEF, Johannes, H.

    Inventor： GRAESSLIN, Ingmar ,  VERNICKEL, Peter ,  DEN BOEF, Johannes, H.

    IPC: G01R33/36

    CPC classification number: G01R33/3607

    Abstract: A method and an RF transmit system for generating RF transmit signals for feeding an RF transmitter (14) in the form of, or comprising, one or more antenna device(s), coil(s), coil elements, or coil array(s) is disclosed. Furthermore, a multi-channel RF transmit system for feeding a plurality of such RF transmitters, especially for use as an RF excitation system in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR) is disclosed. A demand RF transmit signal is compared in the digital domain with an RF transmit signal and digitally corrected with respect to differences or errors between both by means of a complex predistorter (11), an adaption unit (17) and a look-up table unit (18).

    Abstract translation: 一种用于产生RF发射信号的方法和RF发射系统，用于馈送以一种或多种天线装置，线圈，线圈元件或线圈阵列形式的RF发射器（14）的形式或包括一个或多个天线装置 ）被公开。 此外，公开了用于馈送多个这样的RF发射器的多通道RF发射系统，特别是用作用于激励核磁共振（NMR）的磁共振成像（MRI）系统中的RF激励系统。 数字域中的需求RF发射信号与RF发射信号进行比较，并且通过复数预失真器（11），适配单元（17）和查找表单元（21）与二者之间的差异或误差进行数字校正 （18）。

    MAGNETIC RESONANCE IMAGING RECEIVE CHAIN WITH DYNAMIC GAIN AND WIRELESS RECEIVER COIL
    5.
    发明申请
    MAGNETIC RESONANCE IMAGING RECEIVE CHAIN WITH DYNAMIC GAIN AND WIRELESS RECEIVER COIL 审中-公开
    具有动态增益和无线接收机线圈的磁共振成像接收链

    公开(公告)号：WO2005024448A1

    公开(公告)日：2005-03-17

    申请号：PCT/IB2004/051653

    申请日：2004-09-01

    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  U.S. PHILIPS CORPORATION ,  DEN BOEF, Johannes, H.

    Inventor： DEN BOEF, Johannes, H.

    IPC: G01R33/36

    CPC classification number: G01R33/3692 ,  G01R33/3621 ,  G01R33/54 ,  G01R33/543

    Abstract: Dynamic adjustment of the receiver gain during an MRI scan. To account for magnitude and/or phase distortions introduced by the receiver that are not necessarily identical at various receiver gains, a reference rf signal is applied to the receive chain by an additional antenna. Preferably the reference signal is adjusted such that its frequency lies at the border of the frequency band detected by the MR scan. Comparing the a priori known amplitude and phase of the reference signal with the amplitude and phase of the received reference signal allows to determine the distortions introduced at the respective receiver gain which are subsequently corrected. In a further embodiment, the reference signal is used to synchronize the modulation and demodulation units of a wireless transceiver system.

    Abstract translation: MRI扫描期间接收机增益的动态调整。 为了考虑由接收机引入的幅度和/或相位失真，其在各种接收机增益下不一定相同，参考rf信号通过附加天线施加到接收链。 优选地，参考信号被调整为使得其频率位于由MR扫描检测到的频带的边界。 将参考信号的先验已知幅度和相位与接收到的参考信号的幅度和相位进行比较允许确定在随后校正的各个接收机增益处引入的失真。 在另一实施例中，参考信号用于同步无线收发器系统的调制和解调单元。

    RF RECEIVE COIL ASSEMBLY WITH INDIVIDUAL DIGITIZERS AND MEANS FOR SYNCHRONIZATION THEREOF
    6.
    发明申请
    RF RECEIVE COIL ASSEMBLY WITH INDIVIDUAL DIGITIZERS AND MEANS FOR SYNCHRONIZATION THEREOF 审中-公开
    射频接收线圈组件与个别数位器及其同步装置

    公开(公告)号：WO2006048816A1

    公开(公告)日：2006-05-11

    申请号：PCT/IB2005/053549

    申请日：2005-10-31

    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  VAN HELVOORT, Marinus, J., A., M. ,  VAN LIERE, Filips ,  DE VRIES, Lambertus ,  DEN BOEF, Johannes, H. ,  MELTERS, Marcellinus, H., M., W. ,  HAM, Cornelis, L., G. ,  SAES, Marc

    Inventor： VAN HELVOORT, Marinus, J., A., M. ,  VAN LIERE, Filips ,  DE VRIES, Lambertus ,  DEN BOEF, Johannes, H. ,  MELTERS, Marcellinus, H., M., W. ,  HAM, Cornelis, L., G. ,  SAES, Marc

    IPC: G01R33/3415

    CPC classification number: G01R33/3692 ,  G01R33/3415 ,  G01R33/3621

    Abstract: The invention relates to a device (1) for magnetic resonance imaging of a body (7) placed in a stationary and substantially homogeneous main magnetic field comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone. In order to provide an MR device (1) which is arranged to allow for massive parallel imaging without extensive cabling between the individual receiving coils and the back end electronics, the invention proposes to make provision for a plurality of receiving units (10a, 10b, 10c) placed in or near the examination zone, which receiving units (10a, 10b, 10c) each comprise a receiving antenna (12a, 12b, 12c) for receiving MR signals from the body, a digitizing means (21a, 21b, 21c) for sampling the received MR signals and for transforming the signal samples into digital signals, and a transmitter (22a, 22b, 22c) for transmitting the digital signals to a central processing unit (13). Further, the device (1) comprises synchronization means (17) for synchronizing the operation of the individual digitizing means (21a, 21b, 21c) of the receiving units (10a, 10b, 10c).

    Abstract translation: 本发明涉及一种用于磁体共振成像的装置（1），其放置在静止且基本上均匀的主磁场中，该主磁场包括主磁体（2），用于在检查期间产生静止且基本均匀的主磁场 区。 为了提供一种MR器件（1），其被布置成允许在各个接收线圈和后端电子器件之间没有大量布线的巨大的并行成像，本发明提出为多个接收单元（10a，10b， 10c），其中接收单元（10a，10b，10c）各自包括用于从身体接收MR信号的接收天线（12a，12b，12c），数字化装置（21a，21b，21c） 用于对所接收的MR信号进行采样并将信号样本变换为数字信号;以及用于将数字信号发送到中央处理单元（13）的发射器（22a，22b，22c）。 此外，装置（1）包括同步装置（17），用于使接收单元（10a，10b，10c）的各个数字化装置（21a，21b，21c）的操作同步。

    WIRELESS DIGITAL TRANSMISSION OF MR SIGNALS
    7.
    发明申请
    WIRELESS DIGITAL TRANSMISSION OF MR SIGNALS 审中-公开
    无线数字信号传输

    公开(公告)号：WO2004089211A3

    公开(公告)日：2004-12-16

    申请号：PCT/IB2004050378

    申请日：2004-04-01

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  TUITHOF HANS H ,  DEN BOEF JOHANNES H ,  VRIJHEID JOHAN E W ,  SINNEMA DIRK

    Inventor： TUITHOF HANS H ,  DEN BOEF JOHANNES H ,  VRIJHEID JOHAN E W ,  SINNEMA DIRK

    IPC: G01R33/36

    CPC classification number: G01R33/3692 ,  G01R33/3621

    Abstract: A magnetic resonance examination apparatus including a receiving assembly located in the vicinity of an examination zone for producing a signal in response to spin resonance signals for transmission to a signal processing unit. To overcome problems associated with metallic cable connections between the signal generator and the signal processing unit, and to overcome problems associated with existing non-metallic connections, the receiving assembly comprises a digitizer for generating a digital electromagnetic signal for transmission to the signal processing unit.

    Abstract translation: 一种磁共振检查装置，包括位于检查区附近的接收组件，用于响应于用于传输到信号处理单元的自旋共振信号产生信号。 为了克服与信号发生器和信号处理单元之间的金属电缆连接相关的问题，并且为了克服与现有非金属连接相关的问题，接收组件包括用于产生用于传输到信号处理单元的数字电磁信号的数字转换器。

Patent Agency Ranking