DICOM PS3.17 2021c - Explanatory Information

JJJJ.5. Examples of Implementation (Current)
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## JJJJ.5. Examples of Implementation

These are examples how the Attributes can be set for each image family (Section JJJJ.3 Classification of Multi-energy Images).

The structure and content of a Multi-energy CT instance also depends on the architecture of the acquisition device, e.g. multiple sources and multiple detectors vs. switching source and single detector, etc. A variety of architectures will be shown in the following examples, but an example will not be shown for every architecture.

### JJJJ.5.1 Examples For Objective Image Family

#### JJJJ.5.1.1 Example Multiple Physical Sources and Multiple Physical Detectors

This example shows an Effective Atomic Number image acquired on an acquisition device with multiple physical sources and multiple physical detectors.

Table JJJJ.5.1.1-1. CT Image Module Attributes

Attribute Name | Tag | Values
--- | --- | ---
Image Type | (0008,0008) | ORIGINAL\ PRIMARY\ AXIAL\ EFF_ATOMIC_NUM
Multi-energy CT Acquisition | (0018,9361) | YES
… |  |
Rescale Intercept | (0028,1052) | -102.4
Rescale Slope | (0028,1053) | 0.1
Rescale Type | (0028,1054) | Z_EFF
… |  |
KVP | (0018,0060) | {null value because it is described below}
… |  |
Distance Source to Detector | (0018,1110) | 1000
Distance Source to Patient | (0018,1111) | 500
Exposure Time | (0018,1150) | 1000
Single Collimation Width | (0018,9306) | 0.6
Total Collimation Width | (0018,9307) | 38,4
… |  |
Include Table 10-27 “RT Equipment Correlation Macro Attributes Description” in PS3.3 |

Table JJJJ.5.1.1-2. Multi-energy CT Image Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT Acquisition Sequence | (0018,9362) |
>Multi-energy Acquisition Description | (0018,937B) | Dual Source Dual Energy
>Include Table JJJJ.5.1.1-3 “Multi-energy CT X-Ray Source Macro Attributes” |
>Include Table JJJJ.5.1.1-4 “Multi-energy CT X-Ray Detector Macro Attributes” |
>Include Table JJJJ.5.1.1-5 “Multi-energy CT Path Macro Attributes” |
>Include Table JJJJ.5.1.1-6 “CT Exposure Macro Attributes” |
>Include Table JJJJ.5.1.1-7 “CT X-Ray Details Sequence Macro Attributes” |
>Include Table JJJJ.5.1.1-8 “CT Acquisition Details Macro Attributes” |
>Include Table JJJJ.5.1.1-9 “CT Geometry Macro Attributes” |
Multi-energy CT Processing Sequence | (0018,9363) |
>Include Table JJJJ.5.1.1-10 “Multi-energy CT Processing Attributes” |

Table JJJJ.5.1.1-3. Multi-energy CT X-Ray Source Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT X-Ray Source Sequence | (0018,9365) |
ITEM 1
>X-Ray Source Index | (0018,9366) | 1
>X-Ray Source ID | (0018,9367) | Tube A
>Multi-energy Source Technique | (0018,9368) | CONSTANT_SOURCE
>Source Start DateTime | (0018,9369) | 2018.05.01 13:22:03
>Source End DateTime | (0018,936A) | 2018.05.01 13:22:20
>Generator Power | (0018,1170) | 100
ITEM 2
>X-Ray Source Index | (0018,9366) | 2
>X-Ray Source ID | (0018,9367) | Tube B
>Multi-energy Source Technique | (0018,9368) | CONSTANT_SOURCE
>Source Start DateTime | (0018,9369) | 2018.05.01 13:22:03
>Source End DateTime | (0018,936A) | 2018.05.01 13:22:20
>Generator Power | (0018,1170) | 100

Table JJJJ.5.1.1-4. Multi-energy CT X-Ray Detector Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT X-Ray Detector Sequence | (0018,936F) |
ITEM 1
>X-Ray Detector Index | (0018,9370) | 1
>X-Ray Detector ID | (0018,9371) | Detector A
>Multi-energy Detector Type | (0018,9372) | INTEGRATING
>X-Ray Detector Label | (0018,9373) | High-Energy
>Nominal Max Energy | (0018,9374) | 150
>Nominal Min Energy | (0018,9375) | 35
>Effective Bin Energy | (0018,936E) | 90
ITEM 2
>X-Ray Detector Index | (0018,9370) | 2
>X-Ray Detector ID | (0018,9371) | Detector B
>Multi-energy Detector Type | (0018,9372) | INTEGRATING
>X-Ray Detector Label | (0018,9373) | Low-Energy
>Nominal Max Energy | (0018,9374) | 100
>Nominal Min Energy | (0018,9375) | 35
>Effective Bin Energy | (0018,936E) | 60

Table JJJJ.5.1.1-5. Multi-energy CT Path Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT Path Sequence | (0018,9379) |
ITEM 1
>Multi-energy CT Path Index | (0018,937A) | 1
>X-Ray Source Index | (0018,9366) | 1
>X-Ray Detector Index | (0018,9370) | 1
ITEM 2
>Multi-energy CT Path Index | (0018,937A) | 2
>X-Ray Source Index | (0018,9366) | 2
>X-Ray Detector Index | (0018,9370) | 2

Table JJJJ.5.1.1-6. CT Exposure Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Exposure Sequence | (0018,9321) |
ITEM 1
>Referenced X-Ray Source Index | (0018,9377) | 1
>Exposure Time in ms | (0018,9328) | 1000
>X-Ray Tube Current in mA | (0018,9330) | 500
>Exposure in mAs | (0018,9332) | 500
>Exposure Modulation Type | (0018,9323) | CD4D
>CTDIvol | (0018,9345) | 5
ITEM 2
>Referenced X-Ray Source Index | (0018,9377) | 2
>Exposure Time in ms | (0018,9328) | 1000
>X-Ray Tube Current in mA | (0018,9330) | 250
>Exposure in mAs | (0018,9332) | 250
>Exposure Modulation Type | (0018,9323) | CD4D
>CTDIvol | (0018,9345) | 5

Table JJJJ.5.1.1-7. CT X-Ray Details Sequence Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT X-Ray Details Sequence | (0018,9325) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1
>KVP | (0018,0060) | 150
>Focal Spot(s) | (0018,1190) | 1.2
>Filter Type | (0018,1160) | WEDGE2
>Filter Material | (0018,7050) | MIXED
ITEM 2
>Referenced Path Index | (0018,9378) | 2
>KVP | (0018,0060) | 100
>Focal Spot(s) | (0018,1190) | 1.2
>Filter Type | (0018,1160) | WEDGE2+FLAT
>Filter Material | (0018,7050) | TIN

Table JJJJ.5.1.1-8. CT Acquisition Details Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Acquisition Details Sequence | (0018,9304) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1
>Rotation Direction | (0018,1140) | CW
>Revolution Time | (0018,9305) | 0.5
>Single Collimation Width | (0018,9306) | 0.6
>Total Collimation Width | (0018,9307) | 38.4
>Table Height | (0018,1130) | 88.5
>Gantry/Detector Tilt | (0018,1120) | 0
>Data Collection Diameter | (0018,0090) | 500
ITEM 2
>Referenced Path Index | (0018,9378) | 2
>Rotation Direction | (0018,1140) | CW
>Revolution Time | (0018,9305) | 0.5
>Single Collimation Width | (0018,9306) | 0.6
>Total Collimation Width | (0018,9307) | 38.4
>Table Height | (0018,1130) | 88.5
>Gantry/Detector Tilt | (0018,1120) | 0
>Data Collection Diameter | (0018,0090) | 350

Table JJJJ.5.1.1-9. CT Geometry Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Geometry Sequence | (0018,9312) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1\2
>Distance Source to Detector | (0018,1110) | 1000
>Distance Source to Data Collection Center | (0018,9335) | 500

Table JJJJ.5.1.1-10. Multi-energy CT Processing Attributes

Attribute Name | Tag | Values
--- | --- | ---
Decomposition Method | (0018,937E) | HYBRID
Decomposition Description | (0018,937F) | iBHC + MAT DECOMP

#### JJJJ.5.1.2 Example Single Source Multi-layerdetector

This example shows a type Effective Atomic Number image acquired on an acquisition device with a single source and multi-layer detector.

Table JJJJ.5.1.2-1. CT Image Module Attributes

Attribute Name | Tag | Values
--- | --- | ---
Image Type | (0008,0008) | ORIGINAL\PRIMARY\AXIAL\EFF_ATOMIC_NUM
Multi-energy CT Acquisition | (0018,9361) | YES
… |  |
Rescale Intercept | (0028,1052) | 0
Rescale Slope | (0028,1053) | 1.3
Rescale Type | (0028,1054) | 10^-2 Z_EFF
… |  |
KVP | (0018,0060) | {null value because it is described below}
… |  |
Scan Options | (0018,0022) | AXIAL
Data Collection Diameter | (0018,0090) | 500
… |  |
Distance Source to Detector | (0018,1110) | 1040
Distance Source to Patient | (0018,1111) | 570
Exposure Time | (0018,1150) | 750
X-Ray Tube Current | (0018,1151) | 440
Exposure | (0018,1152) | 330
Single Collimation Width | (0018,9306) | 0.625
Total Collimation Width | (0018,9307) | 20.0
… |  |
Include Table 10-27 “RT Equipment Correlation Macro Attributes Description” in PS3.3 |

Table JJJJ.5.1.2-2. Multi-energy CT Image Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT Acquisition Sequence | (0018,9362) |
>Multi-energy Acquisition Description | (0018,937B) |
>Include Table JJJJ.5.1.2-3 “Multi-energy CT X-Ray Source Macro Attributes” |
>Include Table JJJJ.5.1.2-4 “Multi-energy CT X-Ray Detector Macro Attributes” |
>Include Table JJJJ.5.1.2-5 “Multi-energy CT Path Macro Attributes” |
>Include Table JJJJ.5.1.2-6 “CT Exposure Macro Attributes” |
>Include Table JJJJ.5.1.2-7 “CT X-Ray Details Sequence Macro Attributes” |
>Include Table JJJJ.5.1.2-8 “CT Acquisition Details Macro Attributes” |
>Include Table JJJJ.5.1.2-9 “CT Geometry Macro Attributes” |
Multi-energy CT Processing Sequence | (0018,9363) |
>Include Table JJJJ.5.1.2-10 “Multi-energy CT Processing Attributes” |

Table JJJJ.5.1.2-3. Multi-energy CT X-Ray Source Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT X-Ray Source Sequence | (0018,9365) |
ITEM 1
>X-Ray Source Index | (0018,9366) | 1
>X-Ray Source ID | (0018,9367) | Tube A
>Multi-energy Source Technique | (0018,9368) | CONSTANT_SOURCE
>Source Start DateTime | (0018,9369) | 2018.05.01 13:22:03
>Source End DateTime | (0018,936A) | 2018.05.01 13:22:20

Table JJJJ.5.1.2-4. Multi-energy CT X-Ray Detector Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT X-Ray Detector Sequence | (0018,936F) |
ITEM 1
>X-Ray Detector Index | (0018,9370) | 1
>X-Ray Detector ID | (0018,9371) | Detector A
>Multi-energy Detector Type | (0018,9372) | MULTILAYER
>X-Ray Detector Label | (0018,9373) | High-Energy
ITEM 2
>X-Ray Detector Index | (0018,9370) | 2
>X-Ray Detector ID | (0018,9371) | Detector A
>Multi-energy Detector Type | (0018,9372) | MULTILAYER
>X-Ray Detector Label | (0018,9373) | Low-Energy

Table JJJJ.5.1.2-5. Multi-energy CT Path Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
Multi-energy CT Path Sequence | (0018,9379) |
ITEM 1
>Multi-energy CT Path Index | (0018,937A) | 1
>X-Ray Source Index | (0018,9366) | 1
>X-Ray Detector Index | (0018,9370) | 1
ITEM 2
>Multi-energy CT Path Index | (0018,937A) | 2
>X-Ray Source Index | (0018,9366) | 1
>X-Ray Detector Index | (0018,9370) | 2

Table JJJJ.5.1.2-6. CT Exposure Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Exposure Sequence | (0018,9321) |
ITEM 1
>Referenced X-Ray Source Index | (0018,9377) | 1
>Exposure Time in ms | (0018,9328) | 750
>X-Ray Tube Current in mA | (0018,9330) | 440
>Exposure in mAs | (0018,9332) | 330
>Exposure Modulation Type | (0018,9323) | NONE
>CTDIvol | (0018,9345) | 34.9

Table JJJJ.5.1.2-7. CT X-Ray Details Sequence Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT X-Ray Details Sequence | (0018,9325) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1\2
>KVP | (0018,0060) | 120
>Focal Spot(s) | (0018,1190) | 1.4
>Filter Type | (0018,1160) | NONE
>Filter Material | (0018,7050) |

Table JJJJ.5.1.2-8. CT Acquisition Details Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Acquisition Details Sequence | (0018,9304) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1
>Rotation Direction | (0018,1140) | CW
>Revolution Time | (0018,9305) | 0.75
>Single Collimation Width | (0018,9306) | 0.625
>Total Collimation Width | (0018,9307) | 20.0
>Table Height | (0018,1130) | 88.5
>Gantry/Detector Tilt | (0018,1120) | 0
>Data Collection Diameter | (0018,0090) | 500

Table JJJJ.5.1.2-9. CT Geometry Macro Attributes

Attribute Name | Tag | Values
--- | --- | ---
CT Geometry Sequence | (0018,9312) |
ITEM 1
>Referenced Path Index | (0018,9378) | 1
>Distance Source to Detector | (0018,1110) | 1140
>Distance Source to Data Collection Center | (0018,9335) | 570

Table JJJJ.5.1.2-10. Multi-energy CT Processing Attributes

Attribute Name | Tag | Values
--- | --- | ---
Decomposition Method | (0018,937E) | PROJECTION_BASED
Decomposition Description | (0018,937F) | Photo-Electric / Compton Scattering Decomposition

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DICOM PS3.17 2021c - Explanatory Information