Elucidating the structure and function of the nucleus-The

nih4dPurpose: The authors develop the 4D extended cardiac-torso (XCAT) phantom for multimodality imaging research. Methods: Hhly detailed whole-body anatomies for the adult maleThe existing 3D printing methods exhibit certain fabrication-dependent limitations for printing curved constructs that are relevant for many tissues. Four-dimensional (4D) printing is