1. Download a DICOM file: You can find many DICOM files that are for public use
2. Install Invesalius 3.0. This software was designed by the Brazilian government for research purposes but is now only hosted on Github. Go to the releases section on their Github page (https://github.com/invesalius/invesalius3/releases) and download the correct installer for your operating system. Once your download finishes, just install it; there is no bundled malware and adware. You can also compile it with the Github source code, but this process is very complicated and convoluted (don't even try this process if you run Windows). However, if you are a Linux user (especially Ubuntu users) and would like to attempt this, you need to first follow their
3. Open up your DICOM file with Invesalius by navigating to File - import DICOM. Next, without clicking on any of the image groups, press the import button. This action will load the Dicom images on three different planes. Windows users may need to move the scroll icon a little on each of the four boxes that appear afterward in order to visualize the CT scan.
4. Scroll around on each plane until you find your region of interest. Then, on the Create New Mask tab, you can use a predefined preset (Ex.
|The predefined presets give users a faster way to select an area of interest; however, it does not work |
5. Now, check Overwrite last surface and press Create surface. This process generates the 3D model and will take a while.
6. You can play around with Configure 3D surface, but that step is not necessary. You can get the
7. Now download and install MeshMixer here.
8. Open up the exported
9. You rotate the 3D object by holding the right click button and you pan the view by holding down the middle click button.
10. Press select and use the brush tool to select regions you do not need. You can either draw shapes around or paint certain regions; the program will highlight those regions
|The abdominal aorta I isolated from the |
11. Now, you can smooth your model. Use the brush tool, paint the entire object, and press Ctrl F. A window will pop out and you need to click accept in order to finalize the smoothing procedure (you can play around with the smoothing settings in that window).
|The abdominal aorta after smoothing|