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人体头颅的结构复杂,投照时常因角度位置不准确,片子难以达到诊断要求。我们根据水平仪的原理,将一个可旋转360°角的水泡系统(包括旋转标尺及固定的刻度盘)装置在透明的尺体中(见图1)。在投照时无论何种角度,只要旋至气泡居中时均可从刻度盘上读出准确的角度。尺体下部呈对称形的斜面,斜面上粘有两块富有弹性的额垫。投照前后位、侧位、仰卧斜位(如Mayer氏位)时,额垫接触病人的前额,(见图2—3)旋转水泡的角度,即可测出头部矢状面与台面所成的角度。为了校正仪器在前额的中心位置,在
The structure of the human head is complex, often depending on the location of the vote is not accurate, the film is difficult to meet the diagnostic requirements. According to the principle of the spirit level, we put a blister system which can rotate 360 ° (including rotating scale and fixed dial) in a transparent ruler (see Figure 1). Regardless of the angle at the time of casting, the correct angle can be read from the dial as long as the center of the bubble is centered. The lower part of the ruler is symmetrically shaped with two elastic front pads. Projection position, lateral, supine oblique position (such as Mayer’s position), the forehead contact with the patient’s forehead, (see Figure 2-3) Rotate the blister angle, you can measure the head sagittal and tabletop Into the angle. In order to correct the instrument in the center of the forehead, at