For the IUS Monthly September 2023 Webinar, Dr. Yusuke Miyatani (Advanced Inflammatory Bowel Disease Fellow, University of Chicago) presents a case on the use of intestinal ultrasound as a diagnostic tool in a postoperative Crohn's disease patient with a bowel obstruction and Dr. Hughie Fraser (Bridgewater, Nova Scotia) presents a case on the use of intestinal ultrasound as a diagnostic tool in the flare Crohn's disease patient.