Pediatric ultrasound is different to adult ultrasound in all respects. The equipment chosen for pediatric work has different requirments, the technique of scanning is different, the normal anatomy changes throughout childhood and the pathology encountered in childhood are unique to children. This book addresses the 'how', 'why' and 'when' of pediatric ultrasound. Each chapter begins with the 'how': how to scan and what special techniques or tricks to use when scanning children. The 'why' and 'when' discuss the pathology and use of other imaging modalities - an essential skill in pediatric radiology where the limitation of both radiation exposure and number of examinations is of paramount importance.