This is the reference documentation for all classes provided to the user by the FreeART library. FreeART is a tomographic image reconstruction library using Algebraic Reconstruction Technique (ART). Instead of implementing pure ART algorithm, FreeART is using a SART (Simultaneous Algebraic Reconstruction Technique). Using SART instead of pure ART leads to a better looking images by reducing the salt and pepper noise introduced by ART techniques. The FreeART specificity compared to other ART tomographic reconstruction library is that is also includes self-absorption physical effects into the reconstruction algorithm. On top of classical transmission absorption effect, supported self-absorption physical effects are :
- The compton effect
- The fluorescence effect
FreeART allow simple transmission reconstruction.
In compton/fluorescence mode, the self-absorption physical effect taken into account are:
- The incoming beam attenuation inside the sample
- The fluorescence detector solid angle from source point in the sample
- The absorption in the sample seen by the fluorescence/compton emitted beam (for fluorescence the energy of the emitted beam must be known is known)
Using FreeART, it is also possible to reverse the classical tomographic reconstruction process. Starting from a phantom from which you already know the absorption matrix, it is possible to compute the sinogram.
The simplest entry point on freeart is using the python binding. freeart has an executable to run reconstructions from a configuration file using (see executable section):
freeart interpreter myfile.cfg 5
The description of the configuration file parameters is given in freeart.configuration.config.
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