39. A client presents to the emergency department with right…

39. A client presents to the emergency department with right upper quadrant abdominal pain radiating to the right shoulder, nausea, and vomiting after eating a high-fat meal. The client also has fever and tenderness on palpation beneath the right costal margin. The primary care provider suspects acute cholecystitis. Which would be the best diagnostic imaging study for the provider to order to confirm the diagnosis and identify cholelithiasis?