Slice Progression Direction Attribute
| Tag | (0054,0500) |
|---|---|
| Type | Optional (3) |
| Keyword | SliceProgressionDirection |
| Value Multiplicity | 1 |
| Value Representation | Code String (CS) |
Describes the anatomical direction in which a set of slices is progressing (see Section 10.20.1.1). Meaningful only for cardiac images.
Enumerated Values are defined in Section 10.20.1.1.
Section 10.20.1.1
10.20.1.1 Slice Progression Direction
The image or frame order to which the Slice Progression Direction (0054,0500) applies depends on the IOD:
-
In the case of Enhanced Multi-frame IODs, in which a Stack ID (0020,9056) may be defined, Stack ID (0020,9056) shall be used, and the slices are considered in order by In Stack Position Number (0020,9057)
-
In the case of Multi-frame IODs that are not Enhanced, the slices are considered in encoded frame order
-
In the case of single-frame IODs, the order is defined by increasing values of Instance Number
The Enumerated Values depend on the view:
-
If View Code Sequence (0054,0220) indicates a short axis view, such as when it equals (103340004, SCT, "Short Axis"):
Enumerated Values
- APEX_TO_BASE
-
- BASE_TO_APEX
-
-
If View Code Sequence (0054,0220) indicates a vertical long axis view, such as when it equals (131185001, SCT, "Vertical Long Axis"):
Enumerated Values
- ANT_TO_INF
-
Anterior to Inferior
- INF_TO_ANT
-
Inferior to Anterior
-
If View Code Sequence (0054,0220) indicates a horizontal long axis view, such as when it equals (131186000, SCT, "Horizontal Long Axis"):
Enumerated Values
- SEPTUM_TO_WALL
-
Septum to Lateral Wall
- WALL_TO_SEPTUM
-
Lateral Wall to Septum
Note
The conditions on the choice of Enumerated Values are relatively general, rather than specific to a single coded view, in order to accommodate the echocardiography views defined in CID 12226 “Echocardiography Image View” in PS3.16 , in addition to the views for CT, MR, NM and PET defined in CID 26 “Nuclear Medicine Projection” in PS3.16 .
Section 10.20.1.1
10.20.1.1 Slice Progression Direction
The image or frame order to which the Slice Progression Direction (0054,0500) applies depends on the IOD:
-
In the case of Enhanced Multi-frame IODs, in which a Stack ID (0020,9056) may be defined, Stack ID (0020,9056) shall be used, and the slices are considered in order by In Stack Position Number (0020,9057)
-
In the case of Multi-frame IODs that are not Enhanced, the slices are considered in encoded frame order
-
In the case of single-frame IODs, the order is defined by increasing values of Instance Number
The Enumerated Values depend on the view:
-
If View Code Sequence (0054,0220) indicates a short axis view, such as when it equals (103340004, SCT, "Short Axis"):
Enumerated Values
- APEX_TO_BASE
-
- BASE_TO_APEX
-
-
If View Code Sequence (0054,0220) indicates a vertical long axis view, such as when it equals (131185001, SCT, "Vertical Long Axis"):
Enumerated Values
- ANT_TO_INF
-
Anterior to Inferior
- INF_TO_ANT
-
Inferior to Anterior
-
If View Code Sequence (0054,0220) indicates a horizontal long axis view, such as when it equals (131186000, SCT, "Horizontal Long Axis"):
Enumerated Values
- SEPTUM_TO_WALL
-
Septum to Lateral Wall
- WALL_TO_SEPTUM
-
Lateral Wall to Septum
Note
The conditions on the choice of Enumerated Values are relatively general, rather than specific to a single coded view, in order to accommodate the echocardiography views defined in CID 12226 “Echocardiography Image View” in PS3.16 , in addition to the views for CT, MR, NM and PET defined in CID 26 “Nuclear Medicine Projection” in PS3.16 .