首页> 外国专利> MULTICOIL LOW-FIELD NUCLEAR MAGNETIC RESONANCE DETECTION AND IMAGING APPARATUS AND METHOD

MULTICOIL LOW-FIELD NUCLEAR MAGNETIC RESONANCE DETECTION AND IMAGING APPARATUS AND METHOD

机译:多线圈低场核磁共振成像成像装置及方法

摘要

A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.
机译:多线圈NMR检测和成像设备允许在低工作频率下有效地执行多线圈NMR检测和成像。该设备包括交流电压发生器,发射开关电路,线圈开关网络,两个或多个检测线圈的阵列,一组接收开关电路,每个检测线圈都有一个开关电路,以及一组带有输入的前置放大器电路阻抗大大大于每个相应检测线圈在预期工作频率下的阻抗。当前置放大器电路与检测线圈隔离时,AC发生器会产生一个交流波形,该波形在发射模式期间通过多个检测线圈之一。在接收模式下,AC发生器与检测线圈隔离,以防止来自发射器的噪声降低接收信号的质量。

著录项

  • 公开/公告号US2011210731A1

    专利类型

  • 公开/公告日2011-09-01

    原文格式PDF

  • 申请/专利权人 DAVID O. WALSH;

    申请/专利号US201113090436

  • 发明设计人 DAVID O. WALSH;

    申请日2011-04-20

  • 分类号G01R33/44;

  • 国家 US

  • 入库时间 2022-08-21 18:14:05

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