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    Computed tomography apparatus comprising a fade-in device at the emitter end, and method for operating such a computed tomography apparatus
    1.
    发明申请
    Computed tomography apparatus comprising a fade-in device at the emitter end, and method for operating such a computed tomography apparatus 有权
    计算机断层摄影装置，包括在发射端的淡入器件，以及用于操作这种计算机断层摄影装置的方法

    公开(公告)号：US20060050841A1

    公开(公告)日：2006-03-09

    申请号：US10527875

    申请日：2003-09-01

    申请人： Friedrich Distler ,  Matthias Seufert ,  Christoph Suss

    发明人： Friedrich Distler ,  Matthias Seufert ,  Christoph Suss

    IPC分类号： A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  A61B6/4035 ,  G21K1/04

    摘要： In a method for operating a computed tomography apparatus, having an x-ray source rotatable around a system axis and a radiation detector with a detector-proximate beam-gating diaphragm, and a patient support, a spiral scan of a patient on the patient support is conducted by rotating the x-ray source around the system axis while moving the subject on the patient support substantially parallel to the system axis. The diaphragm have movable absorber elements that are curved, and are moved independently of each other toward and away from each other in a direction substantially parallel to they system axis during the spiral scan. The absorber elements are dynamically adjusted in an asymmetrical manner during the spiral scan to reduce overexposure of the examination subject to x-rays.

    摘要翻译： 在用于操作计算机断层摄影装置的方法中，具有围绕系统轴可旋转的x射线源和具有接近检测器的光束门控隔膜的辐射检测器和患者支架，患者支架上的患者的螺旋扫描 通过围绕系统轴线旋转x射线源，同时使病人支架上的被摄体基本上平行于系统轴线移动。 隔膜具有可移动的吸收体元件，其在弯曲状态下在螺旋形扫描期间沿着与其系统轴线基本平行的方向彼此独立地彼此移动并彼此远离。 吸收元件在螺旋扫描期间以不对称的方式被动态地调整，以减少检查对x射线的过度曝光。