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在磁共振(MR)扫描系统的操作过程中,由梯度线圈产生的噪声是不可避免的。线圈在静磁场的X、Y和Z平面上产生磁通梯度,并且在层面选择和空间定位时发挥着重要的作用。扫描所必需的脉冲序列本身引起梯度线圈的振动。从而产生冲击,发生机械噪声,病人对此十分抱怨。据我们所知,在过去的医学文献中,有关MR成像系统梯度线圈噪声的物理学和噪声抑制原理还从未讨论过。然而,Brummett等人最近发表的文章报道说,病人在没有对噪声进行防护的情况下做MR扫描检查,其暂时听力丧失率达13％。
During the operation of a magnetic resonance (MR) scanning system, the noise generated by the gradient coils is unavoidable. The coils create flux gradients in the X, Y, and Z planes of the static magnetic field and play an important role in layer selection and spatial positioning. The pulse sequence necessary for scanning itself causes the vibration of the gradient coil. Resulting in shock, mechanical noise, the patient is very complain about this. To our knowledge, the physics and noise suppression principles of gradient coil noise in MR imaging systems have not been discussed in the medical literature in the past. However, a recent article by Brummett et al. Reported that patients undergoing MR-scan without noise protection had a temporary hearing loss rate of 13%.