Filter Type Attribute
| Tag | (0018,1160) |
|---|---|
| Type | Required (1) |
| Keyword | FilterType |
| Value Multiplicity | 1 |
| Value Representation | Short String (SH) |
| Example Values |
|
Type of filter(s) inserted into the X-Ray beam. See Section C.8.15.3.9.
Note
Part of the CT Additional X-Ray Source Functional Group Macro with usage: C
Required if the image is reconstructed from a system with multiple X-Ray sources and Multi-energy CT Acquisition (0018,9361) is NO or is absent.
Section C.8.15.3.9
C.8.15.3.9 CT X-Ray Details Macro
Table C.8-125 specifies the Attributes of the CT X-Ray Details Macro.
Table C.8-125. CT X-Ray Details Macro Attributes
|
Attribute Name |
Tag |
Type |
Attribute Description |
|---|---|---|---|
|
CT X-Ray Details Sequence |
(0018,9325) |
1 |
Contains the Attributes defining the X-Ray information. If Multi-energy CT Acquisition (0018,9361) is NO or is absent, only a single Item shall be included in this Sequence. If Multi-energy CT Acquisition (0018,9361) is YES, one or more Items shall be included in this Sequence. |
|
>Referenced Path Index |
(0018,9378) |
1C |
References the X-Ray Path Index (0018,937A) in the Multi-energy CT Path Sequence (0018,9379) for this exposure. NoteThis Attribute may contain multiple values if this item describes multiple paths. Required if Multi-energy CT Acquisition (0018,9361) is YES. |
|
>KVP |
(0018,0060) |
1C |
Nominal peak kilo voltage output of the X-Ray generator used. If Multi-energy Source Technique (0018,9368) in Multi-energy CT X-Ray Source Sequence (0018,9365) (of the referenced Multi-energy CT Path Index (0018,937A)) is "SWITCHING_SOURCE", this value is the nominal peak value for a switching phase. The switching phase is identified by the value of X-Ray Source Index (0018,9366) in the Multi-energy CT Path Sequence (0018,9379) corresponding to the value of Referenced Path Index (0018,9378) in this Sequence. Due to limitations of the generating hardware the actual voltage may not reach the nominal peak value. Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL or Image Type (0008,0008) Value 1 is ORIGINAL. May be present otherwise. |
|
>Focal Spot(s) |
(0018,1190) |
1C |
Used nominal size of the focal spot in mm. The Attribute may only have one or two values, for devices with variable focal spot, small dimension followed by large dimension Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL or Image Type (0008,0008) Value 1 is ORIGINAL. May be present otherwise. |
|
>Filter Type |
(0018,1160) |
1C |
Type of filter(s) inserted into the X-Ray beam. Defined Terms:
NoteMultiple type of filters can be expressed by a combination, e.g., BUTTERFLY+WEDGE. Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL or Image Type (0008,0008) Value 1 is ORIGINAL. May be present otherwise. |
|
>Filter Material |
(0018,7050) |
1C |
The X-Ray absorbing material used in the filter. May be multi-valued. Defined Terms:
NoteMIXED may be used to indicate a filter type of complex composition for which listing the individual materials would be excessive or undesirable; it is not intended to mean "unknown". Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL or Image Type (0008,0008) Value 1 is ORIGINAL, and the value of Filter Type (0018,1160) is other than NONE. May be present otherwise. |
|
>Calcium Scoring Mass Factor Patient |
(0018,9351) |
3 |
The calibration factor for the calcium mass score. These factors incorporate the effects of
See Section C.8.2.1.1.7. |
|
>Calcium Scoring Mass Factor Device |
(0018,9352) |
3 |
The calibration factors for the calcium mass score of the device. These factors incorporate the effects of
This a multi-value Attribute, the first value specifies the mass factor for a small patient size, the second value for a medium patient size and the third value for a large patient size. See Section C.8.2.1.1.7. |
|
>Energy Weighting Factor |
(0018,9353) |
1C |
The weighting factor of the data from this Sequence Item. Required if Required if Frame Type (0008,9007) Value 4 of this frame is ENERGY_PROP_WT or Image Type (0008,0008) Value 4 is ENERGY_PROP_WT. May be present otherwise. |