American Shared Hospital Services finances and operates advanced radiation therapy technology through two models: leasing medical equipment to hospitals and running its own radiation therapy centers that bill patients and payors directly. Its installed base includes Gamma Knife stereotactic radiosurgery systems, LINAC radiation therapy systems, and a proton beam radiation therapy (PBRT) system under contract arrangements. In the leasing segment, revenue is tied to procedure volumes via fee-per-use pricing or revenue-sharing on hospital reimbursements, typically under long-term contracts. In direct patient services, the company operates single-unit centers in Rhode Island and international facilities in Peru, Ecuador, and Mexico, where it provides radiation treatments as the principal under patient contracts.