1. A method for determining visceral fat mass of a body, the method comprising: performing a dual-energy X-ray scan of a body; generating at least one dual-energy X-ray image of the body from the dual-energy X-ray scan of the body; identifying a region of interest on the at least one dual-energy X-ray image of the body for determining visceral fat mass of the body; determining a subcutaneous fat mass for each of a plurality of sections of the region of interest; and determining a visceral fat mass for the region of interest based on the determined subcutaneous fat mass for each of the plurality of sections.