Table Column Definition Sequence Attribute
| Tag | (0040,A807) |
|---|---|
| Type | Optional (3) |
| Keyword | TableColumnDefinitionSequence |
| Value Multiplicity | 1 |
| Value Representation | Sequence (SQ) |
The concepts that define the meaning of the columns of the table.
One or more Items are permitted in this Sequence.
Not all columns need to be described.
If a single Item is present, then the concept applies to all the columns.
Items of this Sequence shall be sorted by Table Column Number.
See Section C.18.10.1.1.
Section C.18.10.1.1
C.18.10.1.1 Table Row and Column Definition Sequences
The meaning of the table rows and columns are described in Items of Table Row Definition Sequence (0040,A806) and Table Column Definition Sequence (0040,A807). A coded concept name is provided in Concept Code Sequence (0040,A168) and units, if applicable, in Measurement Units Code Sequence (0040,08EA).
For example:
Example 1. A two-column table, consisting of multiple rows describing forty values of datetime and X-Ray tube current, could be described as follows:
Concept Name Code Sequence (0040,A043) = (113734, DCM, "X-Ray Tube Current")
Tabulated Values Sequence (0040,A801)
Item 1
>Number of Table Rows (0040,A802) = 40
>Number of Table Columns (0040,A803) = 2
>Table Column Definition Sequence (0040,A807)
>Item 1
>>Table Column Number (0040,A805) = 1
>>Concept Name Code Sequence (0040,A043) = (111526, DCM, "DateTime Started")
>Item 2
>>Table Column Number (0040,A805) = 2
>>Concept Name Code Sequence (0040,A043) = (113734, DCM, "X-Ray Tube Current")
>>Measurement Units Code Sequence (0040,08EA) = (mA, UCUM, "mA")
Note
-
The same concept (113734, DCM, "X-Ray Tube Current") can be used to describe the entire table as the column of values that represent the actual values.
-
No Table Row Definition Sequence (0040,A806) is needed, since rows consist of unnamed observations.
-
No Measurement Units Code Sequence (0040,08EA) is needed for the first column, since it contains DateTimes, not numeric values.
Example 2. A four by four matrix representing an affine transformation between two frames of reference could be described as:
Concept Name Code Sequence (0040,A043) = (eRDSRX16, DCM, "X-Ray Source Transformation Matrix")
Tabulated Values Sequence (0040,A801)
Item 1
>Number of Table Rows (0040,A802) = 4
>Number of Table Columns (0040,A803) = 4
Note
-
No Table Row Definition Sequence (0040,A806) or Table Column Definition Sequence (0040,A807) is needed, since the meaning of the rows and columns in a transformation matrix is implicit in the definition of the matrix (for example, the template using this Content Item might reference the behavior defined in Section C.20.2.1.1 Frame of Reference Transformation Matrix).
-
No Measurement Units Code Sequence (0040,08EA) is needed since the numeric values are dimensionless (have no units).
Example 3. A four-column table, consisting of multiple (ten) measurements along an artery, could be described as follows:
Concept Name Code Sequence (0040,A043) = (, , "Arterial Measurements")
Tabulated Values Sequence (0040,A801)
Item 1
>Number of Table Rows (0040,A802) = 10
>Number of Table Columns (0040,A803) = 4
>Table Column Definition Sequence (0040,A807)
>Item 1
>>Table Column Number (0040,A805) = 1
>>Concept Name Code Sequence (0040,A043) = (, , " Distance from landmark ")
>>Measurement Units Code Sequence (0040,08EA) = (mm, UCUM, "mm")
>Item 2
>>Table Column Number (0040,A805) = 2
>>Concept Name Code Sequence (0040,A043) = (, , "X- Measured lumen diameter")
>>Measurement Units Code Sequence (0040,08EA) = (mm, UCUM, "mm")
>Item 3
>>Table Column Number (0040,A805) = 3
>>Concept Name Code Sequence (0040,A043) = (, , "Calculated lumen cross-section area")
>>Measurement Units Code Sequence (0040,08EA) = (mm2, UCUM, " mm2")
>Item 4
>>Table Column Number (0040,A805) = 4
>>Concept Name Code Sequence (0040,A043) = (, , "Stenosis")
>>Measurement Units Code Sequence (0040,08EA) = ([%], UCUM, " [%]")
Note
No Table Row Definition Sequence (0040,A806) is needed, since rows consist of unnamed observations.