Fig. 1From: Impact of image-based motion correction on dopamine D3/D2 receptor occupancy—comparison of groupwise and frame-by-frame registration approachesSchematic illustration of the proposed groupwise image registration (GIR) algorithm for motion correction. With the initialisation in step 1, the algorithm repeats steps 2–5 until convergence and returns the final motion corrected dynamic PET data in step 6 Back to article page