Understanding normal visceral and vascular anatomy provides one of the exciting and rewarding challenges in ultrasound examination. However, as you probably realize, this is more than of passing interest. An appropriate knowledge of abdominal structures and their major blood supply is mandatory for accurate diagnosis. The optimal sonographic examination of the abdomen requires correlation of the visual anatomic image with Doppler information. Keep in mind as you scan that such a complete sonographic evaluation provides a powerful tool for assisting patients and for helping their physicians define the best therapeutic options.