| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Single photon emission computed tomography | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography brain study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography brain metabolism study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography brain glucose metabolism study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography brain dopa metabolism study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography cerebral perfusion study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography heart study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography myocardial glucose metabolism study | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography myocardial rest study using N13 ammonia | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography myocardial stress study using N13 ammonia | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography study for localization of tumor | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography study for tumor uptake of glucose | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography study for tumor uptake of methionine | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography | Using | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography system application software | Is a | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography system operation software | Is a | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography system table, non-powered | Is a | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  | 
| Positron emission tomography system table, powered | Is a | False | Positron emission tomography unit, device | Inferred relationship | Existential restriction modifier |  |