Proton Therapy Market size was valued at USD 454.14 million in 2022 and is expected to reach USD 1,084.90 million by 2029 at a CAGR of 11.5% during the forecast period 2023-2029. Proton therapy is also known as proton beam radiation therapy. Proton is a positively charged particle, and in high energy levels protons can destroy the cancer cells. Proton therapy is a non-invasive procedure in which proton radiation used to treat cancer. Proton therapy is a type of external beam radiation therapy, that painlessly delivers radiation through the skin from outside of the body.