Discussion
This study accessed the feasibility and the fidelity of 3D printed ASD models obtained from 3D-TEE data sets. The major findings of this study were that (1) Through image acquisition, post-processing, the corresponding ASD 3D models which have the same morphological structure with 3D-TEE data sets could be obtained effectively, it was technically feasible to use 3D-TEE images as the data source of 3D printing ASD models. (2) The parameter information of data source images could be highly replicated and retained by the 3D models under strict error control. Ultrasound-derived ASD 3D printed models had highly fidelity. (3) The 3D printed models derived from ultrasound may help plan the ASD closure surgery and make an informed selection of appropriate device.