IntroductionProton therapy is a radiation therapy that uses tiny particles called protons. Proton therapy does not damage as much healthy tissue as photon therapy because of the way it delivers the energy.ProceduresProton therapy is delivered by a device called a cyclotron, which sends a high-energy beam of protons towards the tumour. A CT scan with or without an MRI scan is done for three dimensional mapping of the tumour.IndicationsProton therapy is effective in treating many types of tumours, including tumours of theCNS tumoursHead and neck tumoursPaediatric tumours.AdvantagesTargets tumours and cancer cells with high precision.Reduces overall toxicity and integral dose.