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为适应气管与支气管体层摄影的需要，以几何法对３２３例正常成人胸部Ｘ线平片进行了测量。在正位片测量胸横径、气管杈平面气管中轴至胸左侧壁与右侧壁的水平距离、气管横径、气管中轴至通过左右肺门的垂线的水平距离和左右主支气管与气管中轴延长线的夹角；在侧位片测量胸矢?
In order to meet the need of tracheal and bronchial tomography, 323 normal adult chest radiographs were measured by geometric method. In the anteroposterior measurement of thoracic diameter, tracheal twig plane tracheal axis to chest left and right side wall of the horizontal distance, tracheal diameter, tracheal axis to the left and right hilar horizontal distance and the main bronchus And tracheal axis extension of the angle between the angle in the lateral radiograph measuring chest vector