“…Various other methods have been suggested 4 and, for example, a simple statistical method has been developed which defines diagnostic accuracy, sensitivity and specificity using phantoms within which the position of pathology simulators can be changed manually or with special software. [6][7][8] The method uses phantoms with several regions each containing different numbers of pathology simulators of various sizes and shapes. Within each region, the simulators are identical but spaced randomly.…”