This paper suggests that object oriented technology is particularly applicable in the software implementation of tomographic projection simulation.

本文讨论了两个层次上的面向对象技术在辐射投影模拟软件开发中的应用。

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Time-resolved contrast-enhanced MRA, which combines tomographic and projection imaging methods, is a fast way to obtain the maximum information very quickly during a single procedure.

动态增强MRA结合特殊的成像技术，可以一个步骤就可以快速获得最大程度的信息量。

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Results show that the effect of projection noise on the reconstructed fields is represented by a slope function related to the filter used in deflection tomographic filtered back-projection algorithm.

因此提出了改进的偏折层析滤波反投影算法，数值模拟表明，改进算法在有效抑制倾斜现象的同时，对重建结果不会造成明显的失真。

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