A method and system for magnetic resonance imaging multi-channel signal transmission

Abstract

The invention discloses a multipath signal transmission method and system for magnetic resonance imaging. According to the method, one data line and one clock line are adopted to transmit gain of all receiving channels, so that the sending and receiving of digital gain are achieved. The system provided by the invention comprises a spectrometer control unit and a controllable gain pre-amplifier, which are connected mutually through one data line and one clock line, wherein the spectrometer control unit comprises a gain data merging and parallel-serial conversion circuit and a bus driving circuit, which are connected mutually; the controllable gain pre-amplifier comprises a shaping circuit and a gain data serial-parallel conversion and separation circuit, which are connected mutually. The multipath signal transmission method and system have the advantages as follows: the quantity of spectrometer cables and the volume of a spectrometer are reduced greatly, the difficulty of mounting the spectrometer is reduced, the reliability and capacity of resisting disturbance of gain transmission are greatly improved, the unstable state in the process of changing gain is eliminated, the application ranges of the multipath signal transmission method and system provided by the invention are wide, and relatively strong practical value and practical significance are achieved.

Description

technical field [0001] The invention relates to a method and system for magnetic resonance imaging multi-channel signal transmission, belonging to the technical field of magnetic resonance imaging. Background technique [0002] At present, in the traditional magnetic resonance imaging spectrometer, there are generally multiple receiving channels, and each receiving channel is composed of a controllable gain preamplifier, an analog quadrature detection circuit (or a digital quadrature detection circuit), an analog-to-digital conversion In order to ensure that the amplified signal is within the appropriate dynamic range of the analog-to-digital converter, it is necessary to control the gain of the preamplifier. [0003] At present, most controllable gain preamplifiers include digital control attenuators, and the change of the gain is realized by changing several control bits of the digital control attenuators. Therefore, the control unit of the traditional magnetic resonance i...

AI Technical Summary

Problems solved by technology

Therefore, the problems existing in the magnetic resonance imaging spectrometer in the prior art are as follows: the gain control line increases linearly with the increase of the number of channels, if it is 4 channels, then 8 lines are needed; if it is 32 channels, then 64 lines are needed This will make the number of cables bulky and greatly increase the difficulty of equipment installation, reducing the reliability of the system; in addition, when changing the gain, the magnetic resonance imaging spectrometer in the prior art has an unstable transition period

[0007] Therefore, in summary, the current traditional magnetic resonance imaging spectrometers have a large number of gain control lines, an unstable transition period when changing the gain, complex structure, reliability of gain transmission and anti-interference ability Poor and other disadvantages

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