Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Radiotherapy is a key treatment modality in the clinical management of cancer. Advances in recent years have broadened the tool kit available to oncologists, including the development of proton beam therapy. With several proton beam centres opening globally, this high energy radiotherapy treatment is becoming increasingly accessible. Despite this, several questions remain around how to optimise delivery and support best clinical practice. This collection of articles explores some of the questions surrounding proton beam therapy and discusses recent advances in the delivery of radiotherapy.