Iterative reconstruction of the electron density and effective atomic number using a non-linear forward model

  title={Iterative reconstruction of the electron density and effective atomic number using a non-linear forward model},
  author={K. Aditya Mohan and Kyle M. Champley and Albert W. Reed and Steven M. Glenn and Harry E. Martz},
  booktitle={Defense + Commercial Sensing},
For material identification, characterization, and quantification, it is useful to estimate system-independent material properties that do not depend on the detailed specifications of the X-ray computed tomography (CT) system such as spectral response. System independent ρe and Ze (SIRZ) refers to a suite of methods for estimating the system independent material properties of electron density (ρe) and effective atomic number (Ze) of an object scanned using dual-energy X-ray CT (DECT). The… 



System-Independent Characterization of Materials Using Dual-Energy Computed Tomography

We present a new decomposition approach for dual-energy computed tomography (DECT) called SIRZ that provides precise and accurate material description, independent of the scanner, over diagnostic

Method to Extract System-Independent Material Properties From Dual-Energy X-Ray CT

The subsequent work on “SIRZ-2” is described to simplify the spectral modeling, automate the process, and improve its range and versatility.

EPDL97: the evaluated photo data library `97 version

The Evaluated Photon Data Library, 1997 version (EPLD97), is designed for use in photon transport calculations at Lawrence Livermore National Laboratory. This library includes photon interaction data

Updating Quasi-Newton Matrices With Limited Storage

An update formula which generates matrices using information from the last m iterations, where m is any number supplied by the user, and the BFGS method is considered to be the most efficient.

On the limited memory BFGS method for large scale optimization

The numerical tests indicate that the L-BFGS method is faster than the method of Buckley and LeNir, and is better able to use additional storage to accelerate convergence, and the convergence properties are studied to prove global convergence on uniformly convex problems.

Livermore tomography tools: Accurate, fast, and flexible software for tomographic science

X-Ray Imaging: Fundamentals, Industrial Techniques and Applications

This Digitalbook contains ebooks for every single topic x ray imaging fundamentals industrial techniques and applications accessible for download cost-free.

PyTorch-LBFGS: A PyTorch implementation of L-BFGS

  • .