DICOM PS3.17 2019a - Explanatory Information

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.5.1.1-3. 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.5.1.2-3. 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


DICOM PS3.17 2019a - Explanatory Information