Riazantsev S V, Kalenov V E, Russkikh N A
Vestn Otorinolaringol. 1990 Sep-Oct(5):59-60.
This paper presents an X-ray scheme for calculating the depth of pterygoid canals required for accurate tomography. The scheme includes three lines: line A corresponds to the physiological horizontal line, line B is drawn, normally to line A through the tip of the nose, and line C is the perpendicular from line B to the upper third of the posterior wall of the pterygopalatine fossa. The length of line B plus 1 cm (thickness of external nose soft tissues) is the value to be determined. Twenty-six patients underwent X-ray examinations by an EDK-750B unit (70 kV, 150 mA, 1.65 s). In all cases 1-3 images were sufficient to obtain good visualization of the pterygoid canals.
本文提出了一种用于计算精确断层扫描所需翼管深度的X射线方案。该方案包括三条线：线A对应于生理水平线，线B通常从鼻尖垂直于线A绘制，线C是从线B到翼腭窝后壁上三分之一的垂线。线B的长度加上1厘米（外鼻软组织厚度）即为待确定的值。26例患者使用EDK - 750B设备（70 kV，150 mA，1.65秒）进行了X射线检查。在所有病例中，1 - 3张图像足以清晰显示翼管。
