Eight-channel MR-EPT phased array radio frequency coil input radio frequency signal program control system

Abstract

The invention discloses an eight-channel MR-EPT phased array radio frequency coil input radio frequency signal program control system, and the system comprises an eight-channel digital power divider, an eight-bit digital phase shifter, a T / R switch, a master controller, an eight-channel phased array radio frequency coil and an RS485 bus. The eight-channel phased array coil is applied to an MR-EPT system, the amplitude, the phase and the signal transmission direction of radio frequency signals generated by the radio frequency generation unit are modulated, so that the radio frequency signals of all channels in the eight-channel phased array coil have different power amplitudes and relative phases, and the reconstruction precision of MR-EPT is improved. According to the system, radio frequency signal power distribution and phase adjustment parameters are set through the main controller, a control instruction is sent to the control module through the RS485 bus, control over the output channel of the power divider, the phase shift degree of the phase shifter and the working state of the T / R switch is achieved, and meanwhile feedback signals from the onboard controller can be received to be used for verification of control. The adjusting method is flexible and convenient, and the application range is wide during specific application.

Description

technical field [0001] The invention relates to the technical field of MR-EPT imaging system control, in particular to an eight-channel MR-EPT phased array radio frequency coil input radio frequency signal program control system. Background technique [0002] The radio frequency coil is an important part of the MR-EPT imaging system, and its main function is to transmit and receive radio frequency signals. Compared with other types of radio frequency coils, phased array coils have the characteristics of large imaging field of view and high signal-to-noise ratio. The excellent performance of phased array coils makes them widely used. In the existing MR-EPT eight-channel phased array coil input signal adjustment scheme, the eight channels of the power divider are equal power output, which is the fixed eight-channel output mode, and the phase shift between each channel is fixed at 45°. Therefore, it is impossible to control and adjust the phase shift value through the host com...

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, in order to solve the problem that the power distribution state and the phase shifting state cannot be adjusted in the prior art, an eight-channel MR-EPT phased array radio frequency coil program control system provided by the present invention

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