Table C.8-126b specifies the attributes of the CT Additional X-Ray Source Macro. This sequence may be multi-valued, depending on the number of additional active X-Ray sources. It defines the X-Ray source parameters beyond the basic system.
Table C.8-126b. CT Additional X-Ray Source Macro Attributes
|
Attribute Name |
Tag |
Type |
Attribute Description |
|---|---|---|---|
|
CT Additional X-Ray Source Sequence |
(0018,9360) |
1 |
Contains the attributes defining the data acquisition in a multiple X-Ray source system beyond the primary source. The primary X-Ray source is specified in the CT X-Ray Details Sequence. One or more Items shall be included in this sequence. |
|
>KVP |
(0018,0060) |
1 |
Peak kilo voltage output of the X-Ray generator used. |
|
>X-Ray Tube Current in mA |
(0018,9330) |
1 |
Nominal X-Ray tube current in milliamperes. |
|
>Data Collection Diameter |
(0018,0090) |
1 |
The diameter in mm of the region over which data were collected. |
|
>Focal Spot(s) |
(0018,1190) |
1 |
Used nominal size of the focal spot in mm. |
|
>Filter Type |
(0018,1160) |
1 |
Type of filter(s) inserted into the X-Ray beam. See Section C.8.15.3.9. |
|
>Filter Material |
(0018,7050) |
1 |
The X-Ray absorbing material used in the filter. |
|
>Exposure in mAs |
(0018,9332) |
1 |
The exposure expressed in milliampere seconds, for example calculated from exposure time and X-Ray tube current. |
|
>Energy Weighting Factor |
(0018,9353) |
1C |
The weighting factor of the data from this additional source in a multiple energy composition image. This factor incorporates the effects of
Required if Required if Frame Type (0008,9007) Value 4 of this frame is ENERGY_PROP_WT. May be present otherwise. |