proton therapy
Advanced radiation therapy technique using proton beams that deposit energy primarily at the tumor site with minimal exit dose.
Full Definition
Proton therapy is a specialized form of external beam radiation therapy that uses protons instead of X-rays to treat cancer. Protons have unique physical properties that allow them to deposit most of their energy at a specific depth (the Bragg peak) with minimal dose beyond the tumor, potentially reducing radiation exposure to normal tissues. This technique requires specialized accelerators such as cyclotrons or synchrotrons and is particularly beneficial for pediatric cancers, tumors near critical structures, and cases where normal tissue sparing is paramount.
Usage
Usage note: Clarify distinction from conventional photon-based radiation therapy.
In Context
- "The pediatric patient was referred for proton therapy to minimize late effects." — Referral consultation
- "Proton therapy planning required specialized beam modeling and range calculations." — Physics planning note