Single Photon Emission Computed Tomography Using a Regularizing Iterative Method for Attenuation Correction

摘要

A complete review of the rationale and implementation of the different attenuation compensation methods using either Fourier space (or convolution) or iterative technique is given by T.F. Budinger et al. An alternative to the second approach is proposed here. The problem is considered in the context of its analytical formulation and exact 'tomographic operators' are defined which include the physical properties of gamma-emission tomographic systems. The method proposed belongs to the class of analytical techniques. Although the solution to the 'Tomographic Operators' is an iterative one, this method differs from other iterative techniques in that the mathematics of the procedure is well understood and solutions can be derived for the tomographic-operators in their most general form with the potential of handling three important factors: the actual physical response of the object-detector system, the reduction of noise and the convergence speed. (Atomindex citation 13:677956)