Which body section is best demonstrated with a window width (WW) of 2500 and window level (WL) of 600?

The combination of a window width (WW) of 2500 and a window level (WL) of 600 is optimized for visualizing soft tissues and structures that require a high dynamic range for contrast, such as the liver. In CT imaging, wider window widths are particularly effective for enhancing the detail in structures that are relatively homogeneous in density, like those found in the liver.

In this setting, the liver's composition, which includes both fatty and vascular structures, benefits from this wide window setting, allowing for differentiation of various tissue types and any pathologies present. The choice of window level at 600 further centers the displayed values around the typical attenuation of the liver and its surrounding tissues, improving visibility.

In contrast, windows used for imaging the brain or spinal cord would typically have much narrower settings to emphasize the contrast between grey and white matter or to enhance bony structures found in the spinal anatomy. Facial bones, while occasionally imaged with a wider window, are not prioritized in this instance due to the specific characteristics of the liver and the wider range it covers. Therefore, the option that best demonstrates the body section using the specified WW and WL settings is the liver.