“…The methods of image acquisition, segmentation and reconstruction have been described in previous papers. 8,9 In this work, 17 organs, including bladder, brain, esophagus, eyes, heart, intestine, kidney, liver, lung, spleen, stomach, testes, thyroid, mineral bone, red bone marrow, yellow bone marrow, vessel, muscle, and skin were identified and integrated into the updated voxel-based phantom. 18 Meanwhile, all the organs, except vessel, muscle, and skin, were also implemented in the NURBS-based phantom and the stylized phantom, in which the mineral bone, red bone marrow, and yellow bone marrow were integrated into bone for the complicated structure of marrow was difficult to be described by NURBS surfaces or mathematical equations.…”