FIGURE 3.

Axial panels of two patients treated using real-time magnetic resonance-guided stereotactic ablative radiotherapy, one for a–c) centrally located recurrence and one for d–f) peripheral early-stage nonsmall cell lung cancer. a, d) Computed tomography imaging represents the standard imaging modality for lung tumours. b, e) Linear accelerators with on-board magnetic resonance imaging allow for improved visualisation of soft tissues. c) The daily adaptation of radiotherapy treatment plans allowed for the minimisation of toxicity risks for a tumour recurrence in the mediastinum, which was treated in eight fractions to 60 Gy. f) A peripheral lung tumour located at a non-critical location, which was treated using a single fraction of 34 Gy.