A method, display apparatus, and display system for displaying an image of an abdominal cross-section includes storing plural abdominal CT sample images that have at least either of different visceral fat areas or different subcutaneous fat areas, estimating at least one of a visceral fat area and a subcutaneous fat area of an abdominal cross-section, and displaying an abdominal CT sample image corresponding to the estimated at least one of the visceral fat area and the subcutaneous fat area from among the plural abdominal CT sample images.