Table 2:

Broader categories of spatial relations in radiology

Relation Type	Description
Containment	Denotes that a finding/observation/device is contained within an anatomical location (“There is again seen high T2 signal within the mastoid air cells bilaterally”)
Directional	Denotes a directional sense in which a radiological entity is described wrt location (“An NGT has its tip below the diaphragm”)
Contact	Denotes an entity is in contact with an anatomical structure (“NGT reaches the stomach”)
Encirclement	Denotes a finding is surrounding an anatomical location or another finding (“Left temporal hemorrhage with surrounding edema is redemonstrated”)
Spread	Denotes traversal of an entity toward an anatomical location (“An NG tube extends to the level of the diaphragms.”)
Description	Denotes an anatomical location being described with any abnormality or observation (“There is also some opacification of the mastoid air cells.”)
Distance	Denotes a qualitative distance between a radiographic finding and an anatomical location (“There are areas of T2 hyperintensity near the lateral ventricles.”)
Adjacency	Denotes a radiographic finding is located adjacent to a location (“There is a small amount of hypodensity adjacent to the body of the right lateral ventricle.”)