Figure 3.

STL file postprocessing in a model demonstrating renal fusion, i.e., horseshoe kidney. (a) The segmented medical images were converted into a STL file and imported into a postprocessing software. (b) The desired shell was selected and inverted to highlight and delete floating artifacts around the model. Techniques such as “wrapping” were performed to allow for an initial smoothing. Local smoothing was used to further refine the isolated part into (c) a final shell. (d) This process was repeated for each part of the model until it was completed and ready for printing.