A device that consist of a uniform density or a two or three-dimensional (3-D) pattern of objects, materials or openings of varying dimensions. It includes phantoms that come in both fixed and variable configurations. It is a quality assurance (QA) device used in both subjective and quantitative evaluations of various calibration and performance characteristics of fluoroscopic x-ray systems and associated image display systems, image acquisition software, and related system and application software programs.