Device and method for realizing broadband digital magnetic resonance radio frequency receiving

Abstract

The invention relates to a device and method for realizing broadband digital magnetic resonance radio frequency receiving. The device comprises a radio frequency receiving signal conditioner, a clock phase jitter suppressor, a high-speed analog to digital converter and a digital down converter, wherein the radio frequency receiving signal conditioner conducts front-end voltage amplification and anti-aliasing filtering for a magnetic resonance signal received by an external device; the clock phase jitter suppressor is used for suppressing phase jitter of a system clock and providing a high-stability clock source in a picosecond or femtosecond order of magnitude for the high-speed analog to digital converter and the digital down converter; the high-speed analog to digital converter is used for realizing digitalized conversion of the radio frequency receiving signal; and the digital down converter is used for conducting orthogonal coherent detection, filtering and frequency down conversion for data output by the high-speed analog to digital converter to obtain broadband data, of a real part and an imaginary part, to be output to the external device. The device can ensure higher channel signal to noise ratio, realizes orthogonal coherent detection and conducts accurate control for nuclear magnetic resonance signal receiving phases. In the process of applying a direct oversampling or undersampling technology, the device can ensure good receiving channel signal to noise ratio and has good instantaneity.

Description

technical field [0001] The invention relates to nuclear magnetic resonance control technology, in particular to a wide-band digital magnetic resonance radio frequency receiving device and method. Background technique [0002] In the field of nuclear magnetic resonance control technology, in order to realize nuclear magnetic resonance imaging, the radio frequency receiving system of the nuclear magnetic resonance spectrometer must first perform signal conditioning operations on the nuclear magnetic resonance signals independently generated by the subject received by the receiving coil, and then complete the narrowband radio frequency signal The conversion of the analog signal to the digital signal realizes the orthogonal coherent detection of the radio frequency receiving signal, and implements digital signal processing such as digital filtering and sampling rate conversion according to the limitation requirements of the gradient strength of the scanning sequence and the size ...

AI Technical Summary

Problems solved by technology

At present, the digital magnetic resonance radio frequency receiving device and method capable of adapting to all field strengths have not been reported yet.

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