DICOM PS3.17 2024e - Explanatory Information
JJJJ.5 Examples of Implementation (Current)
Prev  JJJJ Multi-energy CT Imaging (Informative)  Next
PS3.17 > Multi-energy CT Imaging (Informative) > Examples of Implementation

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, encoded as a CT Image IOD.

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 C.36.2.4.12-1 “RT Equipment Mapping and Plan Reference Macro Attributes” 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-layer Detector

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 C.36.2.4.12-1 “RT Equipment Mapping and Plan Reference Macro Attributes” 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

Prev  Up  Next
JJJJ.4 Presentation of Multi-energy Images by Legacy Display Systems  Home  JJJJ.5.2 Examples For Material Quantification Image Family
DICOM PS3.17 2024e - Explanatory Information