RT Book, Section A1 Gelbard, Rondi B. A1 Mahendran, Arunthathi Oormila A1 Hardy, Mark A. A2 Schrope, Beth SR Print(0) ID 57915474 T1 Chapter 6. Abdominal Ultrasound T2 Surgical and Interventional Ultrasound YR 2014 FD 2014 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-176762-0 LK accesssurgery.mhmedical.com/content.aspx?aid=57915474 RD 2024/04/19 AB Since the 1940s, when Dr. George Lewig first used an A-mode ultrasound of the abdomen to detect gallstones in dogs, ultrasonography has become an invaluable diagnostic and therapeutic tool with a wide range of clinical applications. Uniquely safe, portable, and noninvasive, ultrasound provides a means of evaluating internal anatomy unlike other imaging modalities that it frequently complements.