Our pocket-book has come about as a direct attempt to answer the needs of our clinical students. We have tried to use radiology as a magic window for looking at their patients' medical and surgical problems. The book is very simple and highly selective. A number of excellent introductory texts already exist for students seeking comprehensive and balanced accounts of radiology as a specialty. We have tried to keep close to our title: a good guide shows you a bare outline of where you might go, and makes sure you see the highlights. He will point to interesting places that deserve study,...