The "Understanding Ultrasound Physics Fourth Edition" by Sidney K. Edelman is a technical textbook published in 2012 by éS P, Incorporated. It is a comprehensive resource for adult and further education students studying medical ultrasound physics. The hardcover book is written in English and provides detailed explanations of ultrasound physics concepts, making it an essential reference for those interested in the subject area. With its in-depth content and author's expertise, this textbook is designed to help students deepen their understanding of ultrasound physics and its applications in the medical field.