Book excerpt: Here's concise, yet comprehensive coverage of the core radiology knowledge required to competently pass exams and for everyday practice. The text covers three key areas: knowledge of normality; the ability to formulate a differential diagnosis given a finding or a group of findings; and knowledge of disease and the pattern of manifestations relevant to imaging that a particular disease may produce. Organized by body system, each chapter has three sections. The "normal" sections examine normal structure, normal values, and normal findings. The "gamuts" sections contain lists of differential diagnosis for an imaging finding. The "overview" sections describe conditions by pathology and imaging.