This helpful set of materials was created by the folks at the State University of New York's Upstate Medical University. The teaching file includes images, figures, and descriptions of current topical issues in X-ray imaging physics. A team of scholars worked onsite, their efforts supported by a grant from the Radiological Society of North America Research and Education Foundation. The materials are divided into seven sections, which include Radiography, CT, Mammography, and Image Processing. First-time visitors shouldn't miss the Introduction area, which includes information about the world of digital images and their history. Moving on, each of the additional sections contains narrative texts, technique overviews, and explanatory material designed for people getting acquainted with the field.