| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Angiography of artery of head, neck and/or brain | Is a | Procedure on artery of head and neck | true | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Is a | Angiography of artery | true | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Is a | Regional angiography | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Is a | Radiography of face, head AND/OR neck | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Method | Radiographic imaging - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiography of artery of head, neck and/or brain | Procedure site | Structure of cardiovascular system | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiography of artery of head, neck and/or brain | Direct substance | Radiographic contrast media | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Method | Injection - action | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Approach | Transvascular approach | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Method | Investigation - action | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Procedure site | Structure of artery of head, neck AND/OR brain | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiography of artery of head, neck and/or brain | Has intent | Diagnostic intent | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Is a | Radiography of face, head AND/OR neck | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Direct substance | Contrast media | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Is a | Head and neck contrast procedure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiography of artery of head, neck and/or brain | Method | Imaging - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiography of artery of head, neck and/or brain | Procedure site - Direct | Structure of artery of head, neck AND/OR brain | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiography of artery of head, neck and/or brain | Procedure site - Direct | Structure of artery of head, neck AND/OR brain | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiography of artery of head, neck and/or brain | Method | Imaging - action | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Angiography of cervicocerebral arteries | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of thyroid artery | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of cerebral arteries | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of carotid artery | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of eye using fluorescein | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of vertebral artery | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Intravascular ultrasound of intracranial artery | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Computed tomography angiography of intracranial artery with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography of cerebral artery with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography with contrast and thrombolysis of intracranial artery | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Percutaneous embolization of parathyroid artery using fluoroscopic guidance with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography of parathyroid artery using contrast | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Transcranial Doppler ultrasonography of intracranial artery for detection of emboli | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Transcranial Doppler ultrasonography of intracranial artery with study of vasoreactivity | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Transcranial Doppler ultrasonography of intracranial artery using microbubble contrast media for detection of emboli | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography of internal carotid artery with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography of external carotid artery with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Percutaneous balloon test occlusion of anterior cerebral artery using fluoroscopic guidance with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Percutaneous embolization of facial artery using fluoroscopic guidance with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Doppler ultrasonography of temporal artery | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Magnetic resonance angiography of head and neck | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Doppler ultrasonography of ophthalmic artery | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Embolization of artery of head and/or neck using fluoroscopic guidance with contrast | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Fluoroscopic angiography of cervical branch of vertebral artery with contrast | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Computed tomography angiography of brain and neck artery | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Angiography of intracranial artery | Is a | True | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  | 
| Intravenous digital subtraction angiography of cervicocerebral arteries | Is a | False | Angiography of artery of head, neck and/or brain | Inferred relationship | Existential restriction modifier |  |