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故障现象所用机器为ＥＬＳＣＩＮＴ公司的Ｇ -ＹＲＥＸ -２Ｔ系统。质子的共振频率为８１．２７ＭＨｚ,用头表面线圈进行扫描时 ,发现图像失真严重 ,用ＦＳＥ序列扫描时 ,甚至出现信号丢失。故障分析该头表面线圈是由两组线圈组成的正交激励线圈 ,集发射接收于一体 ,信噪比极高
The malfunctioning machine used was ELSCINT’s G-YREX-2T system. The resonance frequency of the proton is 81.27 MHz. When scanning with the head surface coil, it is found that the image distortion is severe. Even when the FSE sequence is used for scanning, even signal loss occurs. Fault Analysis The head surface coil is an orthogonal excitation coil composed of two sets of coils. It is set to transmit and receive in one and the signal to noise ratio is extremely high.