Compare · treatment
Proton therapy
vs IMRT.
Both deliver radiation to a tumour. IMRT uses photons (X-rays) and is the standard high-precision photon radiotherapy. Proton therapy uses accelerated protons that deposit most of their energy at a defined depth (Bragg peak), sparing healthy tissue distal to the tumour.
Verdict
The bottom line.
Proton therapy for: paediatric cancers, prostate, head & neck, base-of-skull tumours, selected lung — anywhere reducing collateral dose to healthy tissue is critical. IMRT for: most adult solid tumours where dosimetric difference is marginal and cost-effectiveness favours IMRT.
Side-by-side
Proton therapy vs IMRT, by the numbers.
Verdict markers (↑) indicate where the listed option has a clear advantage based on aggregate evidence and pricing as of 2024–2025. Individual cases vary — request a personalized assessment for your specific situation.
FAQ
Proton therapy vs IMRT, answered.
- Is proton therapy better than IMRT?
- Dosimetrically — yes, in defined indications where reducing collateral dose to healthy tissue is critical (paediatrics, prostate, base of skull, head & neck). Clinically — the survival benefit is well-established for paediatric cancers but is modest or unproven for many adult indications. IMRT remains standard of care for most diffuse adult solid tumours.
- Why is proton therapy more expensive?
- The synchrotron / cyclotron accelerator infrastructure costs $100M+ to build and is staffed by specialised physicists and engineers. Course pricing in China ($40,000–$120,000) reflects amortisation of that infrastructure across patient volume — still ~⅓ of US pricing.
- When should I choose proton over IMRT?
- Proton recommended: paediatric cancer (under 18), tumours adjacent to optic structures or critical neurological tissue, prostate cancer (when rectal sparing matters), chordoma / chondrosarcoma. IMRT recommended: most adult diffuse solid tumours, breast cancer, lung cancer when not adjacent to critical structures, and where cost-effectiveness analysis favours IMRT.
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