Gradient coil system for a nuclear magnetic resonance tomography
apparatus which reduces acoustic noise
    24.
    发明授权
    Gradient coil system for a nuclear magnetic resonance tomography apparatus which reduces acoustic noise 失效
    用于降低声音噪声的核磁共振成像装置的梯度线圈系统

    公开(公告)号:US5235283A

    公开(公告)日:1993-08-10

    申请号:US829384

    申请日:1992-02-03

    CPC分类号: G01R33/3854

    摘要: The supply of current pulses to gradient coils in a magnetic resonance imaging tomography apparatus results in physical vibration of the coils, causing acoustic noise. For reducing such acoustic noise, a gradient coil system is disclosed wherein the individual gradient coils are secured on a tubular carrier formed by a two concentric shells. The two shells are joined to each other in a manner which is rigid against shearing in the longitudinal direction by connector elements. The self-excited vibrational behavior of the gradient coil system is thereby tuned to lower vibrational amplitudes and to higher vibrational frequencies, so that a more effective damping can be achieved with acoustic damping measures.

    摘要翻译: 在磁共振成像断层摄影装置中向梯度线圈供应电流脉冲导致线圈的物理振动,引起声学噪声。 为了减少这种声学噪声,公开了一种梯度线圈系统,其中各个梯度线圈固定在由两个同心壳形成的管状载体上。 这两个壳体以连接器元件在纵向方向上刚性地抗剪切的方式彼此接合。 因此,梯度线圈系统的自激振动特性被调谐到较低的振动振幅和更高的振动频率,从而可以通过声阻尼措施实现更有效的阻尼。