Expert in: Medical Imaging: MRI（Magnetic Resonance Imaging), CT(Computed Tomography), Ultrasound, PET(Positron Emission Computed Tomography), Clinical Research, Meta-Analysis.

Dr. Sijens was born in 1959 in the Netherlands, and obtained his PhD in 1988. Chapters of his thesis "³¹P NMR spectroscopy of tumors in the evalu­ation of respon­se to therapy" (Rijksuniversiteit Utrecht) were published in Cancer Research (2x), International Journal of Hyperthermia, NMR in Biomedicine (2x) and Radiology. After having worked as a project scientist in Utrecht from 1983-1989, he did a postdoc at Cleveland Clinic Foundation in the group of Dr. Thian Ng (1989-1991). The resultant ³¹P and ¹⁹F MR spectroscopy studies were published in Cancer Research, Magnetic Resonance in Medicine, Magnetic Resonance Imaging and Investigative Radiology. From 1991-2000 he was in charge of clinical MR spectroscopy at Daniel den Hoed Cancer Center (Department of Radiolo­gy, Chairman: Dr. M Oudkerk). Since 2000 he has been responsible for MRI research at the Department of Radiology, University Medical Center Groningen (Prof. R.A. Dierckx) and in charge of experimental and preclinical MR imaging with main focus on neuro-, breast- cardio- and liver MR applications and on quantitative image analysis and segmentation. Since 2002 he has been the associate professor at Rijksuniversiteit Groningen (RUG). Current functions include faculty membership of the European School of Radiology (ESOR), board membership of Research Foundation Flanders and numerous board memberships of scientific journals (deputy editor of J Magn Reson Imaging and of Acta Radiologica). He is the author of 125 international scientific papers cited 2469 times (Hirsch index 29).