02/01/2026
Just been diagnosed with lung cancer and hearing about radiotherapy?
Here's what it actually means.
Radiotherapy uses focused beams of high-energy X-rays to destroy cancer cells by targeting them at a cellular level.
These beams damage the DNA inside cancer cells, stopping them from dividing and growing.
Healthy cells around the tumour are affected too, but here's the crucial difference: normal cells are far better at recovering from radiation damage than cancer cells.
That's why radiotherapy for lung cancer is divided into multiple fractions. By delivering small doses daily over weeks, we accumulate irreparable damage in cancer cells whilst giving normal tissues time to heal between treatments.
This therapeutic window is what makes radiotherapy effective and tolerable.
Radiotherapy is used in approximately half of all cancer patients.
It's one of our most trusted treatments for lung cancer, whether aiming for cure, local control of the disease, or relief of symptoms.
It's powerful, precisely targeted, and backed by decades of clinical evidence in lung cancer treatment.
Over this series, we'll cover everything involved in lung cancer radiotherapy, from planning to delivery to what you can expect.
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