Manuel Todorovic, MSc, from the department of radiotherapy and radiation oncology at University Medical Center Hamburg-Eppendorf (UKE) discusses evaluating intra-fraction motion for cranial radiosurgery patients. He begins by giving a short introduction to Brainlab Elements Multiple Brain Mets SRS software. He then outlines the analysis thereof by presenting their study design as well as the analyzed data and results, including corrections in positioning and repositioning made with ExacTrac.