This book provides a comprehensive and concise, review of the fundamental concepts and clinical indications for Transcranial Doppler (TCD) imaging. An overview of the physics of ultrasonography as it pertains to TCD is presented, as well as neuroanatomy and cerebrovascular physiology in healthy and diseased states. Recommended protocols for neuroimaging are reviewed and serves as a guide for existing neurovascular laboratories and medical systems seeking to develop laboratories that are in need of a guide to establish their own protocols.