The role of point-of-care ultrasound (POCUS) in improving diagnostic accuracy, decreasing time to diagnosis and as an adjunct to physical exam skills is indisputable. This book is meant to serve as a guide to understanding basic principles of image obtention in diagnostic POCUS. Clinicians will benefit a great deal from it when starting off a career in medicine. It covers basic anatomy, principles of ultrasound image acquisition, imaging techniques and key pathologies that can be easily identified by POCUS.