X-rays are no longer the only imaging methods used in contemporary Radiology departments. Medical students are now faced with a range of complex and sophisticated machinery - radioisotopes, ultrasound, CT and MRI are all used to demonstrate human anatomy and pathology affecting internal organs. Students don't have to understand in depth the workings and techniques involved in these imaging methods. The purpose of this book is to demystify and familiarise the techniques enough for them to understand the rationale behind selection of a given method in clinical practice. This short textbook explains in the simplest terms the basic technical and physical principles of apparatus, so the machinery no longer intimidates the student. It also shows how the different methods are selected and used in clinical practice to demonstrate the internal organs and their diseases. This is done system by system (chest, heart, central nervous system, etc) - the approach most familiar to medical students.