分层层析成像中典型构件数字投影计算机仿真

对于板壳状构件的层析检测，采用射线沿构件长宽表面倾斜入射的扫描方式，以在厚度方向上获取的数字投影重建扫描区域的不同断层。在实际的实现过程中，由于投影数据受一些干扰因素(噪声、运动误差等)的影响，并将综合地反映到重建结果中，因此很难对重建算法进行定性分析。为此本文给出了典型模型在该种扫描方式下数字投影数据的计算机仿真算法以及仿真结果，从而为研究在该扫描方式下的工业计算机层析成像(ICL)重建方法提供了有力的手段。

COMPUTER SIMULATION OF DIGITAL PROJECTIONS OF TYPICAL OBJECTS BASED ON COMPUTED LAMINOGRAPHY RECONSTRUCTION

In order to execute non destructive testing for shell like objects, a new scanning method has been introduced. X rays irradiate on the surface of the reconstructed object along an oblique direction, through special reconstruction algorithms, cross sections of the object can be obtained slice by slice. In practical application, however, the projection data are polluted by some factors such as noise, motion errors, and so on. So it is difficult to analyze the reconstruction algorithm qualitatively. In this paper, a computer simulation algorithm of digital projections for typical objects based on the scanning method was proposed, and the results of simulation were given.