Book excerpt: Lower urinary tract symptoms may be the result of a structural or functional abn- mality. To consider either in isolation would be an incomplete assessment, but c- bined anatomical and functional imaging provides a more powerful and complete tool for investigation of lower urinary tract malfunction. Yet many of the currently available radiological texts concerning lower urinary tract imaging fail to discuss these two aspects in a holistic manner. We hope that this book will fll this gap. Although it is written to be as comprehensive as possible such that it covers the vast majority of lower urinary tract disorders that will be encountered in adult urological practice, it is not meant to replace conventional textbooks of uroradiology. Rather, it is meant to be practical and user friendly. It is intended for everyday clinical use; it should allow the trainee and trained radiologist or urologist to plan a logical, yet complete radiological and dynamic investigation of the lower urinary tract. It should also be useful for nurse practitioners, medical students, and all other medical staff who commonly manage lower urinary tract disorders.