Fault diagnosis circuit and method for tuning and detuning system of local coil

Abstract

The embodiment of the invention discloses a fault diagnosis circuit and method for a tuning and detuning system of a local coil. Wherein, the tuning and detuning system of the local coil includes at least one coil array, at least one tuning and detuning drive circuit, corresponding to the coil array one by one, the output terminal can be connected to the corresponding coil array, and the first input terminal is connected to the first voltage source. The output end is connected, the second input end is connected with the output end of the second voltage source, and the fault diagnosis circuit includes a first current acquisition circuit for collecting the first current at the output end of the first voltage source; the processor is connected with at least one offset The control terminal of the harmonic drive circuit is connected to the output terminal of the first current acquisition circuit, and is used for short-circuit and / or open-circuit fault diagnosis for the tuning and detuning system of the local coil according to the first current. The embodiment of the present invention can implement short-circuit and / or open-circuit fault diagnosis on the system, reduce the use of components, reduce the cost, and reduce the volume of the system.

Description

technical field [0001] The invention relates to magnetic resonance imaging technology, in particular to a fault diagnosis circuit and method for a tuning and detuning system of a local coil. Background technique [0002] A Magnetic Resonance Imaging (MRI) system includes various coils, such as a body coil that covers the whole body, a local coil that only covers a certain part of the body, and the like. Local coils with receiving antennas are widely used in magnetic resonance imaging systems. Local coils can be applied to different parts of the human body with different sizes, such as head coils (head and neck coils), spine coils, abdominal coils, lower limb coils, etc., with a good signal-to-noise ratio. [0003] The local coil includes multiple coil arrays, each coil array includes several coil units, and each coil unit includes several PIN diodes, capacitors, inductors and other devices. The coil unit (Element) needs to be tuned and detuned to control the operating freq...

AI Technical Summary

Problems solved by technology

In this way, if the local coil includes multiple coil arrays, multiple current acquisition circuits and voltage acquisition circuits are required to monitor the local coils, which will increase the cost

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