Algebraic filter approach for fast approximation of nonlinear tomographic reconstruction methods
Faculty of Sciences. Physics
Engineering sciences. Technology
Journal of electronic imaging. - Springfield, Va
, 12 p.
University of Antwerp
We present a computational approach for fast approximation of nonlinear tomographic reconstruction methods by filtered backprojection (FBP) methods. Algebraic reconstruction algorithms are the methods of choice in a wide range of tomographic applications, yet they require significant computation time, restricting their usefulness. We build upon recent work on the approximation of linear algebraic reconstruction methods and extend the approach to the approximation of nonlinear reconstruction methods which are common in practice. We demonstrate that if a blueprint image is available that is sufficiently similar to the scanned object, our approach can compute reconstructions that approximate iterative nonlinear methods, yet have the same speed as FBP. (C) 2015 SPIE and IS&T