DICOM PS3.3 2019a - Information Object Definitions

C.7.6.4b Enhanced Contrast/Bolus Module

Table C.7-12b specifies the Attributes that describe the contrast/bolus used in the acquisition of the Image.

Table C.7-12b. Enhanced Contrast/Bolus Module Attributes

Attribute Name

Tag

Type

Attribute Description

Contrast/Bolus Agent Sequence

(0018,0012)

1

Sequence that identifies one or more contrast agents administered prior to or during the acquisition.

One or more Items shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 12 “Radiographic Contrast Agent”.

>Contrast/Bolus Agent Number

(0018,9337)

1

Identifying number, unique within this SOP Instance, of the agent administered. Used to reference this particular agent from the Contrast/Bolus Functional Group Macro. The number shall be 1 for the first Item and increase by 1 for each subsequent Item.

>Contrast/Bolus Administration Route Sequence

(0018,0014)

1

Sequence that identifies the route of administration of contrast agent.

Only a single Item shall be included in this Sequence.

>>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 11 “Route of Administration”.

>Contrast/Bolus Ingredient Code Sequence

(0018,9338)

2

Active ingredient of agent.

Zero or more Items shall be included in this Sequence.

>>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 13 “Radiographic Contrast Agent Ingredient”.

>Contrast/Bolus Volume

(0018,1041)

2

Total volume administered in milliliters of diluted contrast agent.

>Contrast/Bolus Ingredient Concentration

(0018,1049)

2

Milligrams of active ingredient per milliliter of agent.

>Contrast/Bolus Ingredient Percent by Volume

(0052,0001)

3

Percentage by volume of active ingredient in the total volume.

>Contrast/Bolus Ingredient Opaque

(0018,9425)

3

Absorption of the ingredient greater than the absorption of water (tissue).

Enumerated Values:

YES

NO

See Section C.7.6.4b.1.

>Contrast/Bolus T1 Relaxivity

(0018,0013)

3

T1 Relaxivity of the MR Contrast/Bolus used specified in s-1*mmol-1 specified at body temperature in human blood plasma.

>Contrast Administration Profile Sequence

(0018,9340)

3

Sequence that describes one or more phases of contrast administered.

One or more Items are permitted in this Sequence.

>>Contrast/Bolus Volume

(0018,1041)

2

Volume administered during this phase in milliliters of diluted contrast agent.

>>Contrast/Bolus Start Time

(0018,1042)

3

Time of start of administration.

>>Contrast/Bolus Stop Time

(0018,1043)

3

Time of end of administration.

>>Contrast Flow Rate

(0018,1046)

3

Rate of administration in milliliters/sec. Only a single value shall be present.

>>Contrast Flow Duration

(0018,1047)

3

Duration of injection in seconds. Only a single value shall be present.


C.7.6.4b.1 Enhanced Contrast/Bolus Module Attributes
C.7.6.4b.1.1 Contrast/Bolus Ingredient Opaque for X-Ray Equipment

Contrast/Bolus Ingredient Opaque (0018,9425) Attribute specifies the type of relative X-Ray absorption of the contrast/bolus ingredient, compared to the X-Ray absorption of water.

Enumerated Values:

YES

The contrast/bolus ingredient absorbs more X-Ray photons than water

NO

The contrast/bolus ingredient absorbs less X-Ray photons than water

Note

The Contrast/Bolus Ingredient Opaque (0018,9425) Attribute determines the sign of the gradient of X-Ray beam intensity from inside to outside the injected vessel, thus allowing optimal settings of the image processing applications (e.g., vessel edge detection, etc.), see Figure C.7.6.4b-1.

The relative gray level of the injected vessel with respect to the gray level of the water of Pixel Data (7FE0,0010) is determined by the Contrast/Bolus Ingredient Opaque (0018,9425) and by the Pixel Intensity Relationship Sign (0028,1041). For example, if the contrast/bolus ingredient is more radio graphically dense than water (i.e., YES), and the Pixel Intensity Relationship Sign (0028,1041) is -1, then the contrast/bolus ingredient is represented by higher values of Pixel Data than water.

X-Ray beam intensity vs. Contrast/Bolus Ingredient Opaque

Figure C.7.6.4b-1. X-Ray beam intensity vs. Contrast/Bolus Ingredient Opaque


DICOM PS3.3 2019a - Information Object Definitions