acta de conferencia

"Software Environment for the Implementation of Tomographic Reconstruction Algorithms Applied to Cases of Few Projections"

A.B. Ríos, A. Valda and H. Somacal

Proc. of the "VII Latin American Symposium on Nuclear Physics and Applications", Cusco, Perú, June 11-16, 2007. Ed. R. Alarcon, P.L. Cole, C. Djalali and F. Umeres

AIP Conf. Proc., Vol.**947** (2007) *485-486*

Abstract

Usually tomographic procedure requires a set of projections around the object under study and a mathematical processing of such projections through reconstruction algorithms. An accurate reconstruction requires a proper number of projections (angular sampling) and a proper number of elements in each projection (linear sampling). However in several practical cases it is not possible to fulfill these conditions leading to the so-called problem of few projections. In this case, iterative reconstruction algorithms are more suitable than analytic ones. In this work we present a program written in C++ that provides an environment for two iterative algorithm implementations, one algebraic and the other statistical. The software allows the user a full definition of the acquisition and reconstruction geometries used for the reconstruction algorithms but also to perform projection and backprojection operations. A set of analysis tools was implemented for the characterization of the convergence process. We analyze the performance of the algorithms on numerical phantoms and present the reconstruction of experimental data with few projections coming from transmission X-ray and micro PIXE (Particle-Induced X-Ray Emission) images.

DIVISION ESPECTROSCOPIA NUCLEAR DISCRETA