Christian Hopfgartner studied mathematics at the University Erlangen-Nuremberg, Germany, between 2000 and 2007, with an emphasis on applied mathematics, nonlinear optimization and image processing. He graduated with the degree `Diplom-Mathematiker'. Since 2007 he is working as a software developer at ISO Software Systeme GmbH, Nuremberg, Germany. His current responsibilities focus on predevelopment of postprocessing algorithms for CT-images.