1. Department of Radiology, Alysis Zorggroep, location Rijnstate, TA Arnhem, The Netherlands Background: A 42-year-old female presented with chronic knee pain. Anamnesis and physical examination revealed no history of traumatic events. Furthermore, there was no local tenderness, swelling or warm aspect of the knees or tibiae. On conventional imaging, gonarthrosis was seen, as well as a well-def...