An innovative new system at Massachusetts General Hospital (MGH) is helping to reduce the uncertainties in proton therapy. In this short film, researchers at the MGH explain how they can fire a beam of protons at a tumour then check whether their beam has hit the intended target. The team had to devise a way to quickly transfer a patient to a PET scanner after proton therapy, without leaving them feeling seasick.

If you enjoyed this video, then you may want to watch this film about the history of the MGH and its approach to cancer therapy.