Michael Ljungberg is a Professor at Medical Radiation Physics, Lund, Lund University, Sweden. He started his research in the Monte Carlo field in 1983 through a project involving a simulation of whole-body counters but later changed the focus to more general applications in nuclear medicine imaging and SPECT. As a parallel to his development of the Monte Carlo code SIMIND, he started working in 1985 with quantitative SPECT and problems related to attenuation and scatter. After obtaining his PhD in 1990, he received a research assistant position that allowed him to continue developing SIMIND for quantitative SPECT applications and establish successful collaborations with international research groups. At this time, the SIMIND program also became used world-wide. Dr. Ljungberg later became an associate professor in 1994 and he received, after a couple of years working clinically as a nuclear medicine medical physicist, a full professorship in the Science Faculty at Lund University in 2005. He became the Head of the Department of Medical Radiation Physics at Lund University in 2013 and a full professor in the Medical Faculty at Lund University in 2015.

Beside from the development of SIMIND to include also new camera system such as CZT detectors, his research includes an extensive project in oncological nuclear medicine, where he, with colleagues, develop dosimetry methods based on quantitative SPECT, Monte-Carlo absorbed dose calculations, and methods for accurate 3D dose planning for internal radionuclide therapy. During the recent years, his has been focused on implementing Monte-Carlo based image reconstruction in SIMIND. He is also involved in the undergraduate education of medical physicists and bio-medical engineers and are supervising MSc and PhD students. In 2012, Professor Ljungberg became a member of the European Association of Nuclear Medicines task group on Dosimetry and served there for six years. He has published over 100 original papers, 18 conference proceedings, 18 books and book chapters and 14 peer-reviewed review papers.