| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Computed tomography of head, neck and thorax with contrast | Is a | Computed tomography of head, neck and thorax | true | Inferred relationship | Existential restriction modifier |  |  | 
| Computed tomography of head, neck and thorax with contrast | Is a | Computed tomography of neck and thorax with contrast | true | Inferred relationship | Existential restriction modifier |  |  | 
| Computed tomography of head, neck and thorax with contrast | Is a | Computed tomography of head and thorax with contrast | true | Inferred relationship | Existential restriction modifier |  |  | 
| Computed tomography of head, neck and thorax with contrast | Is a | Computed tomography of head and neck with contrast | true | Inferred relationship | Existential restriction modifier |  |  | 
| Computed tomography of head, neck and thorax with contrast | Method | Computed tomography imaging - action | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Computed tomography of head, neck and thorax with contrast | Procedure site - Direct | Neck structure | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Computed tomography of head, neck and thorax with contrast | Using substance | Contrast media | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Computed tomography of head, neck and thorax with contrast | Method | Computed tomography imaging - action | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Computed tomography of head, neck and thorax with contrast | Procedure site - Direct | Head structure | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Computed tomography of head, neck and thorax with contrast | Using substance | Contrast media | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Computed tomography of head, neck and thorax with contrast | Method | Computed tomography imaging - action | true | Inferred relationship | Existential restriction modifier | 3 |  | 
| Computed tomography of head, neck and thorax with contrast | Procedure site - Direct | Structure of thoracic cross-sectional segment of trunk | true | Inferred relationship | Existential restriction modifier | 3 |  | 
| Computed tomography of head, neck and thorax with contrast | Using substance | Contrast media | true | Inferred relationship | Existential restriction modifier | 3 |  |