Digital phantom for medical radiography, and method and system for processing a medical image using the digital phantom

The present invention relates to a digital phantom for medical radiography, and to a method and system for obtaining a medical image using said digital phantom. Said digital phantom according to one embodiment of the present invention comprises: a grid module disposed between a radiation source and a detector, having a plurality of spots arranged in an array by partitions that intersect horizontally and vertically, wherein the angles of said partitions are formed to correspond to the light progression path of said radiation; and at least one standard object attached to at least one of the spots in said grid module and designed to correspond to the predetermined amount of transmission of said radiation.