The Integrated Particle (Proton + Heavy Ion) Therapy System ecosystem spans upstream component suppliers, midstream system integrators, and downstream clinical operators. Upstream, specialized manufacturers provide accelerator modules, gantry mechanics, and high‑purity isotopic targets. Midstream actors assemble these components into turnkey treatment suites, embed control software, and certify compliance with medical device regulations. Downstream, hospitals, cancer centers, and research institutes purchase, commission, and operate the systems while generating revenue through patient reimbursements and research grants. Value is captured through equipment sales, long‑term service contracts, and data‑driven treatment planning platforms, creating a cyclical flow of technology upgrades and clinical outcomes.