General-purpose diagnostic x-ray phantom, test object
Definition
A device that consists 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 calibration protocols and in subjective and quantitative evaluations of various calibration and performance characteristics of conventional and digital general-purpose x-ray imaging systems. It is also used in the assessment of the performance characteristics of associated image acquisition, display, and analysis computer programs.