What is radiotherapy and how does it work? | Cancer Research UK

Radiotherapy plays a crucial part in treating lots of different cancers. And new technology is making it more precise and reducing side effects. It works by firing x-rays or other intense bundles of energy at cancer cells, damaging their DNA. If a cancer cell can't repair its damaged DNA, it dies.
0:01 Radiotherapy
0:20 What does the radiation do?
0:30 How does radiotherapy work?
1:04 SABR - a new technique
1:24 Proton beam therapy
1:42 Thyroid cancer treatment
Find out more about radiotherapy on the Cancer Research UK news website: news.cancerres...
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