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A Multi-nuclide and Multi-channel Parallel Acquisition NMR Receiver

A multi-channel, nuclide technology, applied in magnetic resonance measurement and other directions, to achieve the effect of improving integration and scalability, reducing interference, and suppressing the generation of image frequency bands

Active Publication Date: 2020-06-19
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nuclear magnetic resonance receiver scheme that satisfies the above two design requirements at the same time has not been reported in the relevant literature, which belongs to the technical blank field and is a key problem to be solved urgently in the field of nuclear magnetic resonance instrument technology

Method used

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  • A Multi-nuclide and Multi-channel Parallel Acquisition NMR Receiver

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Experimental program
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Embodiment 1

[0024] Such as figure 1 As shown, a multi-nuclide multi-channel parallel acquisition nuclear magnetic resonance receiver includes an FPGA control module 8, and also includes several nuclide sampling units,

[0025] Each nuclide sampling unit includes a local oscillator module 1, a power divider 3, a multi-channel analog-to-digital converter 7 and several orthogonal down-conversion sampling units,

[0026] Each quadrature down-conversion sampling unit includes a front-end variable gain amplifier 2, a quadrature demodulator 4, a low-pass filter 5, and a rear-end variable gain amplifier 6,

[0027] The local oscillator module 1 is connected to the power divider 3, and the power divider 3 is respectively connected to the quadrature demodulator 4 in each quadrature down-conversion sampling unit,

[0028] The front-end variable gain amplifier 2 is connected with the quadrature demodulator 4, the quadrature demodulator 4 is connected with the low-pass filter 5, the low-pass filter 5...

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Abstract

The invention discloses a multi- nuclide multi-channel parallel acquisition nuclear magnetic resonance receiver comprising an FPGA control module and a plurality of nuclide sampling units. Each of thenuclide sampling units comprises a local oscillator module, a power divider, a multi-channel analog-digital converter and a plurality of quadrature down-conversion sampling units; each of the quadrature down-conversion sampling units includes a front-end variable gain amplifier, a quadrature demodulator, a low-pass filter, and a back-end variable gain amplifier. The receiver can realize parallelreceiving of multi-channel magnetic resonance signals of each nuclide; the integration and scalability of the system are improved; the generation of mirror image frequency bands can be effectively suppressed; and the wide-band RF reception can be performed to achieve full-band coverage of signals.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance instruments, in particular to a multi-nuclide and multi-channel parallel acquisition nuclear magnetic resonance receiver, which is suitable for nuclear magnetic resonance imagers or nuclear magnetic resonance spectrometers, and is used to realize multi-channel nuclear magnetic resonance signals generated by different nuclei parallel acquisition and processing. Background technique [0002] The nuclear magnetic resonance radio frequency signal receiving device is an indispensable part of the nuclear magnetic resonance instrument, and is used to realize the demodulation, sampling, filtering, storage and accumulation of the nuclear magnetic resonance signal. With the continuous expansion of the research field of nuclear magnetic resonance technology, the nuclear magnetic resonance instrument system is increasingly showing the direction of multi-nuclide acquisition and fast acquisit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/32
CPCG01R33/32
Inventor 张志陈方刘朝阳
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI