Type-level market taxonomy separates negative-ion systems, representing 71 % of 2023 shipments, from positive-ion units. Negative-ion cyclotrons, typically 18 MeV Hโ machines, enable double stripping to reach 99 % extraction efficiency and are preferred when self-shielding footprints < 25 mยฒ are mandatory in hospital bunkers. Their higher vacuum requirements add ~ US$ 0.4 million to capex but reduce neutron background, a regulatory advantage in densely populated areas. Conversely, positive-ion cyclotronsโmostly 24 MeV D+ or ฮฑ+ configurationsโclaim 29 % of the installed base and are favored for high-current (โฅ 100 ยตA) isotope breeding or neutron generator end-uses where shielded vaults already exist. Average selling prices diverge: negative-ion systems averaged US$ 2.8 million in 2023, while positive-ion units commanded US$ 2.4 million despite higher beam power, reflecting buyer composition of cost-sensitive emerging markets. The type split is widening at 2.3 percentage points per annum, indicating a sustained shift toward negative-ion technology in the global High Energy Medical Cyclotron market.