system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following structures does the ureter cross on an abdominal radiograph?
assistant
The correct answer is  The ureter crosses the pelvic brim over the sacroiliac joint. The ureter lies over the transverse processes of the lumbar veebrae on an abdominal film. The ureter turns medially to enter the bladder over the ischial spine, not the ischial tuberosity. The ureter passes into the bladder along the line between the ischial spine and the pubic tubercle, but stops sho of overlying it