The rapidly growing area of nuclear medicine imaging receives only limited attention in broad-based medical dictionaries. This encyclopedic dictionary is intended to fill the gap. More than 400 entries of between one and three paragraphs are included, defining and carefully explaining terms in an appropriate degree of detail. The dictionary encompasses concepts used in planar, SPECT, and PET imaging protocols and covers both scanner operations and popular data analysis approaches. In spite of the mathematical complexities in the acquisition and analysis of images, the explanations given are easy to understand and many helpful concrete examples are provided. The book will be ideal for those who wish to obtain a rapid grasp of a concept beyond a definition of a few words but do not have the time to search the reference literature.