Many people have been asking about the difference between photon radiation therapy (the most common form currently available in Australia) and proton radiation therapy, and why this difference is so important in modern cancer care.
In simple terms (and noting I am not a medical expert):
- Photon radiation (X-ray based) passes through the body, delivering radiation on the way into the tumour and again beyond it. This can expose surrounding healthy tissue and critical organs to unnecessary radiation.
- Proton radiation is more precise. Protons release most of their energy at the tumour site and then stop (known as the Bragg Peak), which can significantly reduce radiation exposure to healthy tissue beyond the tumour.
This distinction matters most when treating:
- Children and young people
- Tumours near critical structures such as the brain, spine, heart, lungs, or eyes
- Patients where long-term side effects, secondary cancers, or quality-of-life impacts are major considerations
For those who prefer a visual explanation, the following short videos explain both the science and the clinical context:
🔗 How Does Proton Therapy Work? — Proton Therapy IBA https://www.youtube.com/watch?v=hFc7gJQohxI
🔗 Differences in Proton and Photon Therapy — Johns Hopkins Medicine https://www.youtube.com/watch?v=7EFTHl87KcQ
Disclaimer: These videos are shared for educational purposes only. This petition and its organisers are not affiliated with, funded by, or promoting any company, manufacturer, hospital, or technology provider. The videos are used solely to explain the underlying physics and clinical rationale.
What Australians need: not one or the other, but access to the right option
Proton therapy is not appropriate for all cancers, and traditional photon radiation remains a vital and highly effective treatment for many patients.
What matters most is that Australians have access to best-practice care based on:
- Tumour type
- Tumour location
- Patient age
- Long-term risk and survivorship considerations
In many comparable health systems, this means having both photon and proton therapy available, so clinicians can recommend the most appropriate treatment for each individual, rather than being limited by what is locally available.
Why this matters for Australian leadership — and why action is needed now
This is why families, clinicians, and advocates continue to raise proton therapy with Australian leaders.
Australia is not starting from scratch. A purpose-built bunker already exists, designed to house a proton therapy system. Detailed planning, clinical justification, and costings have been completed and are already in the hands of decision-makers.
What is missing is not evidence or readiness, it is a decision.
Internationally, proton therapy is recognised as core cancer treatment infrastructure within modern oncology systems. Every year this decision is delayed, Australian patients continue to:
- Travel overseas for treatment
- Bear avoidable emotional and financial burden
- Experience inequitable access based on geography or personal means
- Miss opportunities to reduce long-term treatment-related harm, particularly for children
Leadership must now set a clear timeline.
Select a system, commit to the investment, and move immediately to make the centre operational. Further delay is not neutral, it has real and lasting consequences for patients and families.
The infrastructure is ready.
The clinical case is established.
By continuing to defer a decision, Australia is choosing delay over delivery.
We ask Federal and State leaders to act decisively and publicly, and to do so NOW.