| Source Element | Usage | Target |
| ImagingSelection | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ImagingSelection |
| ImagingSelection.id | UseExtensionFromAncestor | - |
| ImagingSelection.meta | UseExtensionFromAncestor | - |
| ImagingSelection.implicitRules | UseExtensionFromAncestor | - |
| ImagingSelection.language | UseExtensionFromAncestor | - |
| ImagingSelection.text | UseExtensionFromAncestor | - |
| ImagingSelection.contained | UseExtensionFromAncestor | - |
| ImagingSelection.extension | UseExtensionFromAncestor | - |
| ImagingSelection.modifierExtension | UseExtensionFromAncestor | - |
| ImagingSelection.identifier | UseExtensionFromAncestor | - |
| ImagingSelection.status | UseExtensionFromAncestor | - |
| ImagingSelection.subject | UseExtensionFromAncestor | - |
| ImagingSelection.issued | UseExtensionFromAncestor | - |
| ImagingSelection.performer | UseExtensionFromAncestor | - |
| ImagingSelection.performer.id | UseExtensionFromAncestor | - |
| ImagingSelection.performer.extension | UseExtensionFromAncestor | - |
| ImagingSelection.performer.modifierExtension | UseExtensionFromAncestor | - |
| ImagingSelection.performer.function | UseExtensionFromAncestor | - |
| ImagingSelection.performer.actor | UseExtensionFromAncestor | - |
| ImagingSelection.basedOn | UseExtensionFromAncestor | - |
| ImagingSelection.category | UseExtensionFromAncestor | - |
| ImagingSelection.code | UseExtensionFromAncestor | - |
| ImagingSelection.studyUid | UseExtensionFromAncestor | - |
| ImagingSelection.derivedFrom | UseExtensionFromAncestor | - |
| ImagingSelection.endpoint | UseExtensionFromAncestor | - |
| ImagingSelection.seriesUid | UseExtensionFromAncestor | - |
| ImagingSelection.seriesNumber | UseExtensionFromAncestor | - |
| ImagingSelection.frameOfReferenceUid | UseExtensionFromAncestor | - |
| ImagingSelection.bodySite | UseExtensionFromAncestor | - |
| ImagingSelection.focus | UseExtensionFromAncestor | - |
| ImagingSelection.instance | UseExtensionFromAncestor | - |
| ImagingSelection.instance.id | UseExtensionFromAncestor | - |
| ImagingSelection.instance.extension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.modifierExtension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.uid | UseExtensionFromAncestor | - |
| ImagingSelection.instance.number | UseExtensionFromAncestor | - |
| ImagingSelection.instance.sopClass | UseExtensionFromAncestor | - |
| ImagingSelection.instance.subset | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D.id | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D.extension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D.modifierExtension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D.regionType | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion2D.coordinate | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D.id | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D.extension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D.modifierExtension | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D.regionType | UseExtensionFromAncestor | - |
| ImagingSelection.instance.imageRegion3D.coordinate | UseExtensionFromAncestor | - |