Article 1 Biological organs 1 Clutter (information theory) 1 Errors 1 Experiment set-up 1 Grand Challenge 1 Ground truth 1 Humans 1 In-silico 1 Lung 1 Lung Neoplasms 1 Lung motion 1 Markerless 1 Patient monitoring 1 Phantoms 1 Phantoms, Imaging 1 Prospective Studies 1 Radiotherapy 1 Radiotherapy Planning, Computer-Assisted 1 Radiotherapy, Intensity-Modulated 1 Retrospective Studies 1 Silico studies 1 Target tracking 1 Targets tracking 1 Thorax 1 Tracking approaches adaptive radiotherapy 1 adult 1 algorithm 1 catalyst 1