This report introduces five two-dimensional standard test objects for radiographic studies. Given a particular experimental design, these objects can be used to create simulated (typically noisy) data. They can then be compared with object reconstructions. The potential applications include testing reconstruction algorithms, examining experimental designs, and probing the limits of existing systems. Each object is described analytically independant of any finite spatial sampling. Collectively, they encompass a large variety of spatial characteristics and are relevant and applicable to many 2D problems of current interest. These test objects are not directly applicable to 3D-based reconstruction techniques. Generally, the additional dimension might be spatial or temporal (for example, the use of multiple time shots) or both.

LA-UR-02-3978