行扫描间距,行距
The scanning system is controlled by precise stepper motor which can be controlled by computer to sweep over point by point with 1 mm pitch.
扫描系统由精密步进电机控制,进行间距约1mm的逐点扫描。
Spiral scanning was performed after appropriately distended by introduction of air at different body positions, collimation and table pitch and orientation of the colon lumen with respect to the gantry.
结肠适度充气后,在不同体位、层厚和螺距、扫描角度下行螺旋CT扫描,观察CTVC成像效果。
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