This phantom is a semi anthropomorphic phantom representing the abdomen, including the liver, spleen and the spine. Organ contours do not change throughout the entire phantom.

The phantom has 64 spherical lesions in the liver with 8 and 12 mm diameter and lesion contrasts of 10, 20, 30 and 40 HU to the surrounding liver.
The phantom can be used in CT (including CBCT) to assess the detectability of spherical low-contrast lesions in a uniform liver background.