octave-astra-toolbox 1.8.3-1 (amd64 binary) in ubuntu groovy

 It supports 2D parallel and fan beam geometries, and 3D parallel and
 cone beam. All of them have highly flexible source/detector
 positioning.
 .
 A large number of 2D and 3D algorithms are available, including FBP,
 SIRT, SART, CGLS.
 .
 The basic forward and backward projection operations are
 GPU-accelerated, and directly callable from Octave and Python to
 enable building new algorithms.
 .
 This is the Octave library.