Quick Start

1. File - Create Phantom...
   This creates a window with the geometric phantom. Choose the Herman head phantom.
2. Process - Rasterize...
   This creates an image file of the phantom by converting it from a geometric definition into a rasterized image. You may use the defaults shown in the dialog box.
3. View - Auto...
   Use this command on the new rasterized image window. This will optimize the intensity scale for viewing the soft-tissue details of the phantom. Select the median center and a standard deviation factor of 0.1.
4. Process - Projections...
   Use this command on the geometric phantom window. This simulates the collection of x-ray data. You may use the defaults shown in the dialog box. Additionally, you may wish to turn on Trace - Projections to watch to x-ray data being simulated.
5. Reconstruction - Filtered Backprojection...
   Use this command on the projection window. This will reconstruct an image from the projections. Once again, you may use the defaults shown in the dialog box.
6. View - Auto...
   Use this command on the new reconstructed image window. This will optimize the intensity scale for viewing the soft-tissue details of the reconstruction. Select the median center and a standard deviation factor of 0.1.
7. Analyze - Compare Images...
   Use this command on the rasterized phantom image window. This will bring up a dialog box asking for the comparison image. Select the reconstruction image that you just made and also select the "Make difference image" check box. You'll then see the image distance measurements and also a new window with the difference between the rasterized phantom and the reconstruction.
8. That's it! You have just performed the basic operations with CTSim. By varying the parameters of the rasterization, projection, and reconstructions you perform endless computed tomography experiments. CTSim also has many other visualization and analysis features that you learn more about by reading the manual.