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相比通常的扇束和平行束 CT 重建, 锥束 CT 有诸多优点( 如空间分辨率高, 扫描速度快等) 。 近似锥束重建算法理论结构简单, 重建速度快, 易于实际应用。对新出现的几种近似锥束重建算法作了 简单介绍, 并利用这些算法对 3D Shepp-log an 模型的仿真模拟对这些算法的特点作了比较和讨论。

Cone-beam computer tomography (CT) has evolved as a topic of rapidly growing interest during the last years (see, for example, Grangeat et al (1996, 1997), PMB (1998) and Carlsson (1999) and references therein). The development of two-dimensional CT detectors has a large impact on the complete spectrum of applications of x-ray CT. This is especially valid for areas like non-destructive testing and medical imaging.

The ATLDllCOMServer sample demonstrates how to use Acitve Template Library (ATL) wizards in Visual Studio 2008 to generate an out-of-process COM server. ATL is designed to simplify the process of creating efficient, flexible, lightweight COM components. ATLExeCOMServer exposes an ATL STA simple object with properties, methods, and events:

The creation and access of a COM object (more specifically, an ATL out-of- process COM object in this sample) using MFC and the class wrapper generated by the VC++ class wizard.MFC调用COM接口示例代码，对COM编写，调用有很好的知道意义。