Double-frequency radio-frequency coil

Abstract

The invention discloses a double-frequency radio-frequency coil which comprises at least one coil unit, wherein each coil unit comprises a closed loop circuit and a pre-amplifier, each closed loop circuit is composed of a double-frequency tuned circuit, a double-frequency detuned circuit, a double-frequency coil matching circuit and a capacitor C1, one end of the double-frequency coil matching circuit is connected with an input terminal (In) of the pre-amplifier through a capacitor C5, the other end of the double-frequency coil matching circuit is connected with a ground terminal (GND) of the pre-amplifier, and an output terminal (Out) of the pre-amplifier is connected with a double-frequency radio-frequency Balun circuit. According to the double-frequency radio-frequency coil, due to the fact that the double-frequency detuned circuit and the double-frequency radio-frequency Balun circuit can work under two frequencies and the double-frequency tuned circuit is also double-frequency, then the double-frequency radio-frequency coil can work under two frequency points, accordingly the double-frequency radio-frequency coil can be suitable for two nuclear magnetic resonance systems with different field intensity, and coil purchasing cost of hospitals is reduced.

Description

technical field [0001] The invention relates to a radio frequency coil, in particular to a dual frequency radio frequency coil for magnetic resonance imaging. Background technique [0002] Magnetic Resonance Imaging (MRI for short) technology is to send radio frequency pulses to the human body through radio frequency transmitting coils to stimulate the resonance of atomic nuclei (such as hydrogen nuclei) at specific frequencies in the human body to generate magnetic resonance signals, which will be received by radio frequency receiving coils. The signal is processed by a computer to perform medical imaging on the human body. [0003] Dual-frequency coils are sensitive to magnetic resonance signals generated by nuclei of two specific frequencies. At present, dual-frequency coils are generally only used for spectral research, for the quantitative analysis of another element other than H (hydrogen), such as Na, P, etc. Usually, the H nuclear image is used to locate the regio...

AI Technical Summary

Problems solved by technology

Existing dual-frequency coils can resonate at two frequencies, but cannot be used in two field strength systems at the same time

For example, it can only be applied to 1.5T magnetic resonance system, or only to 3T magnetic resonance system, which requires hospitals that purchase systems with different field strengths to be equipped with two sets of coils suitable for different field strengths, and they cannot be used universally, resulting in The cost of purchasing coils in hospitals increases

In addition, when a certain coil is damaged, the system will even stop scanning a certain part

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