Difficulty: Advanced

You should be able to obtain a DICOM (.dcm) file from your doctor. If not you can find some free online such as NBIA.

 Now we need to open our DICOM file in a software program mentioned above and then limit the view to what we would like to print. In the image below what is highlighted in green is what will be printed.

Once we have the model in view we need to convert it into an .stl file which can then be printed. To do this we need to make a surface construction first and then export the file. Follow the steps in the software. This may take a while and slow down your computer, there should be a loading bar to see the progress (probably in the bottom right corner).

Most likely the model will have many non-manifold errors (holes, separate parts, etc.) This is the hardest step in the process and will require an understanding of non-manifolds. Perhaps the easiest method is to upload the model(.stl) into the netfabb cloud, although this may not work. If it doesn't then you will need to try other methods found in the following post. I would start with Meshlab. An easy way to see the errors is in Meshmixer as seen in the image below.