DICOM PS3.17 2022d - Explanatory Information

XXXX Radiotherapy Examples

XXXX.1 RT Structure Set

XXXX.1.1 Coding RT ROI Interpreted Type Information

The tables in this Section provide examples of how to utilize coded information along with the Defined Term in RT ROI Interpreted Type (3006,00A4) for backward compatibility. For details of how to map between Defined Terms and codes see Section C.8.8.8.3.1 “Mapping of RT ROI Interpreted Type” in PS3.3.

Table XXXX.1-1 illustrates the definition of a prostate with the role GTV.

Table XXXX.1-1. Coding Example Prostate as GTV

Attribute Name

Tag

Value

Comment

Structure Set ROI Sequence

(3006,0020)

>ROI Number

(3006,0022)

5

>ROI Name

(3006,0026)

Prostate

...

RT ROI Observations Sequence

(3006,0080)

>Observation Number

(3006,0082)

1

>Referenced ROI Number

(3006,0084)

5

>Segmented Property Category Code Sequence

(0062,0003)

(91723000, SCT, "Anatomical Structure")

From CID 7150 “Segmentation Property Category”

>RT ROI Identification Code Sequence

(3006,0086)

(41216001, SCT, "Prostate")

From CID 7160 “Pelvic Organ Segmentation Type”

>>Segmented Property Type Modifier Code Sequence

(0062,0011)

Not present

>Therapeutic Role Category Code Sequence

(3010,0064)

(130041, DCM, "RT Target")

From CID 9503 “Radiotherapy Therapeutic Role Category”

>Therapeutic Role Type Code Sequence

(3010,0065)

(228791009, SCT, "GTV")

From CID 9534 “Radiotherapy Target”

>RT ROI Interpreted Type

(3006,00A4)

GTV

...


Table XXXX.1-2 illustrates the definition of a left eye, the name of the ROI and the SNOMED Code Meanings an text values provided in German, and with the role Organ At Risk.

Table XXXX.1-2. Coding Example Left Eye as OAR

Attribute Name

Tag

Value

Comment

Structure Set ROI Sequence

(3006,0020)

>ROI Number

(3006,0022)

2

>ROI Name

(3006,0026)

Linkes Auge

...

RT ROI Observations Sequence

(3006,0080)

>Observation Number

(3006,0082)

3

>Referenced ROI Number

(3006,0084)

2

>Segmented Property Category Code Sequence

(0062,0003)

(91723000, SCT, "Anatomische Strukturen")

From CID 7150 “Segmentation Property Category”

>RT ROI Identification Code Sequence

(3006,0086)

(79652003, SCT, "Augapfel")

From CID 4028 “Craniofacial Anatomic Region”

>>Segmented Property Type Modifier Code Sequence

(0062,0011)

(7771000, SCT, "Links")

From CID 247 “Laterality Left-Right Only”

>Therapeutic Role Category Code Sequence

(3010,0064)

(130042, DCM, "Berechnungsstruktur der RT-Dosis")

From CID 9503 “Radiotherapy Therapeutic Role Category”

>Therapeutic Role Type Code Sequence

(3010,0065)

(130060, DCM, "Organ in Gefahr")

From CID 9535 “Radiotherapy Dose Calculation Role”

>RT ROI Interpreted Type

(3006,00A4)

OAR

...


Table XXXX.1-3 illustrates the definition of an implanted coil marker with the role of a registration mark.

Table XXXX.1-3. Coding Example Marker Coil as Registration Mark

Attribute Name

Tag

Value

Comment

Structure Set ROI Sequence

(3006,0020)

>ROI Number

(3006,0022)

1

>ROI Name

(3006,0026)

Implant 1

...

RT ROI Observations Sequence

(3006,0080)

>Observation Number

(3006,0082)

6

>Referenced ROI Number

(3006,0084)

1

>Segmented Property Category Code Sequence

(0062,0003)

(130666, DCM, "Radiotherapy Fiducial")

From CID 9502 “RT Segment Annotation Category”

>RT ROI Identification Code Sequence

(3006,0086)

(129301, DCM, "Coil Marker")

From CID 7112 “Radiotherapy Fiducial”

>>Segmented Property Type Modifier Code Sequence

(0062,0011)

Not present

>Therapeutic Role Category Code Sequence

(3010,0064)

(130746, DCM, "RT Registration Mark")

From CID 9503 “Radiotherapy Therapeutic Role Category”

>Therapeutic Role Type Code Sequence

(3010,0065)

(112171, DCM, "Fiducial mark")

From CID 9581 “Radiotherapy Registration Mark”

>RT ROI Interpreted Type

(3006,00A4)

REGISTRATION

...


Table XXXX.1-4 illustrates the definition of a (manually) enlarged object representing a PTV, where the category of the geometric concept "RT Target" is chosen from CID 9580 “RT Segmentation Property Category” and the category of the role "RT Target" is chosen from CID 9503 “Radiotherapy Therapeutic Role Category”.

Table XXXX.1-4. Coding Example Object as PTV

Attribute Name

Tag

Value

Comment

Structure Set ROI Sequence

(3006,0020)

>ROI Number

(3006,0022)

1

>ROI Name

(3006,0026)

PTV1

...

RT ROI Observations Sequence

(3006,0080)

>Observation Number

(3006,0082)

6

>Referenced ROI Number

(3006,0084)

1

>Segmented Property Category Code Sequence

(0062,0003)

(130041, DCM, "RT Target")

From CID 9580 “RT Segmentation Property Category”

>RT ROI Identification Code Sequence

(3006,0086)

(228793007, SCT, "PTV")

From CID 9534 “Radiotherapy Target”

>>Segmented Property Type Modifier Code Sequence

(0062,0011)

Not present

>Therapeutic Role Category Code Sequence

(3010,0064)

(130041, DCM, "RT Target")

From CID 9503 “Radiotherapy Therapeutic Role Category”

>Therapeutic Role Type Code Sequence

(3010,0065)

(228793007, SCT, "PTV")

From CID 9534 “Radiotherapy Target”

>RT ROI Interpreted Type

(3006,00A4)

PTV

...


DICOM PS3.17 2022d - Explanatory Information