Material Decomposition for Energy Resolving Detectors using Weighted Levenberg-Marquardt Optimization

Introduction: Energy resolving X-ray photon counting detectors are able to assign each detected photon to energy bins [1] (Figure 1). This allows the decomposition of an X-ray image into the materials of the acquired object [1, 2], which has potential benefits in angiography. Contrast agent can be extracted without acquiring a mask image, possibly saving dose and avoiding problems with patient motion. We introduce and evaluate physical model fitting approaches, which are solved using a modified Levenberg-Marquardt (LM) algorithm [3].