  The muon radiography technique is part of the straight-ray scanning imaging
methods and it is usually employed to produce two-dimensional images of the
integrated density in the radial direction from the detector position. However,
in the literature there are already some examples of muon tomographies made by
combining several measurements from different observation points. The work
presented in this article fits into this line of research: a tomography of a
target composed of lead blocks arranged in a non-trivial geometry was carried
out by means of muon absorption radiography measurements. To solve the
inversion problem, an iterative algorithm called SART was employed, obtaining
better results than using a Chi-squared minimization.
