A language for generating tomographic images of mathematical phantoms

A computer language is presented that can be used to generate image files, as if the images are created with a CT or a MR scanner. The language defines objects in the “scanner’s” coordinate system, as sets of quadratic inequalities. Each of these objects, e.g., an ellipsoid or a half-plane or a cylinder, has its own density. Objects can be superimposed and collections of objects are allowed to translate and rotate. The language allows for a concise way of describing complex objects with precisely defined geometries and densities. An implementation of the language can be used for testing, developing, and analyzing diagnostic software,treatment planning systems, etc. A software module that is based on the language can be made available. The utility of the module for acceptance testing of radiation therapytreatment planning systems is described.