Ljungberg, Michael is a Professor at the Department of Medical Radiation Physics, Lund University, Sweden. He started his research in the Monte Carlo field 1983 by a project involving simulation of whole-body counters but changed the focus to more general applications in nuclear medicine imaging and SPECT. As a parallel track to his development of the Monte Carlo code SIMIND, he started 1985 working with quantitative SPECT and problems related to attenuation and scatter. After his PhD graduation 1990, he received a research assistant position at the department that allowed him to continue developing SIMIND for quantitative SPECT applications and establish successful collaborations with international research groups. In 1994, he became an associate professor and 2005 a full professor. His current research also include an extensive project in oncological nuclear medicine, where he develop dosimetry methods based on quantitative SPECT, Monte Carlo absorbed dose calculations and registration methods, for accurate 3D dose planning for internal radionuclide therapy. He is also involved in undergraduate education of medical physicists and is supervising several PhD students. He is the head of Department of Medical Radiation Physics. In 2012 Dr. Ljungberg became a member of the European Association of Nuclear Medicines task group on Dosimetry.