Fig. 3From: Lungtech, a phase II EORTC trial of SBRT for centrally located lung tumours – a clinical physics perspectiveCIRS phantom with the 15 mm sphere size animated with a 15 mm/6 s breathing signal (a) Superposition of 10 % and 40 % phases (the most distant sphere positions) PET-CT images - (b) Average PET-CTBack to article page