Methods:12 patients with PE were performed spiral CT volume scanning. Three dimensional and multiplanar images of pulmonary artery were obtained after post procession in the work station.
方法：回顾性分析12例PE患者，均行螺旋CT容积扫描，并在工作站进行图像后处理，获得肺动脉多平面重建图像及三维立体图像。
It shows that using the three dimension laser scanning and mapping system for measuring tree crown volume is practical and applicable.
研究表明，利用三维激光扫描系统测量树冠体积具有较强的实践意义和应用价值。
The imaging spectrometer using diffractive optics has compact construction, small volume and rapid scanning speed, and its practical ground manufacture have been visible.
采用二元光学元件的成像光谱仪结构紧凑，体积小，扫描速度快，已研制出地面实用型产品；
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