Magnetic resonance system and method for detecting performance of radio frequency coil thereof

Abstract

The invention discloses a magnetic resonance system and a method for detecting the performance of a radio frequency coil thereof. The magnetic resonance system comprises at least one receiving link. Each receiving link is connected with a coil and a low noise amplifier in series, bi-directional couplers are connected between the coils and the low noise amplifiers in series, and testing signals are connected into the bi-directional couplers through diverter switches. According to the magnetic resonance system and the method for detecting the performance of the radio frequency coil thereof, the bi-directional couplers and the diverter switches are arranged so that the scattering parameter of the coil can be measured, the resonant frequency and the quality factor Q value of the coil can be calculated, coil faults can be judged rapidly and conveniently, imaging operation like water model placement is needless, the method is simple and practicable, and results are reliable.

Description

technical field [0001] The invention relates to a medical diagnostic device and a performance testing method thereof, in particular to a magnetic resonance system and a radio frequency coil performance testing method thereof. Background technique [0002] Existing magnetic resonance systems include at least one receiving chain (RX), such as figure 1 As shown, the radio frequency coil (Coil) is directly connected in series with the low noise amplifier (LNA) in the receiving chain (RX). At present, the method of detecting the local transmitting / receiving coil in the general magnetic resonance system is to judge whether the coil is within the index specification through the image obtained by the water model imaging. The index standard includes the brightness and uniformity of the water model image in the region of interest. , this method is very complicated and troublesome through imaging operations such as placing water models. [0003] Existing magnetic resonance systems do...

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Problems solved by technology

At present, the method of detecting the local transmitting / receiving coil in the general magnetic resonance system is to judge whether the coil is within the index specification through the image obtained by the water model imaging. The index standard includes the brightness and uniformity of the water model image in the region of interest. , this method is very complicated and troublesome by placing water models and other imaging operations

[0003] The existing magnetic resonance system does not use radio frequency scattering parameters to verify the design of whether the local transmitting / receiving coil is working normally. In fact, the scattering parameters of radio frequency are an effective method to measure whether the coil is working normally and whether the performance meets the requirements.

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