DICOM PS3.20 2025a - Imaging Reports using HL7 Clinical Document Architecture
10.8 SOP Instance Observation (Current)
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PS3.20 > Entry-level Templates > SOP Instance Observation

10.8 SOP Instance Observation

Template ID

1.2.840.10008.9.18

Name

SOP Instance Observation

Effective Date

2015/03/24

Version Label

DICOM-20150324

Status

Active

Description

A SOP Instance Observation contains the DICOM Service Object Pair (SOP) Instance information for referenced DICOM composite objects. The SOP Instance act class is used to reference both image and non-image DICOM instances. The text attribute contains the DICOM WADO reference.

Classification

CDA Entry Level

Relationships

Context

parent node

Open/Closed

open

Revision History

DICOM-20150324: Initial publication, derived from template originally published in DIR r1-2009, revised in Consolidated CDA r1-2011 as 2.16.840.1.113883.10.20.6.2.8

This derivation includes Purpose of Reference value set specified with DICOM CID 7003; directly incorporates descendant templates Purpose of Reference Observation, Referenced Frames, and Boundary Observation

Business Name

Nest Level

Element/​Attribute

Card

Elem/Attr Conf

Data Type

Value Conf

Value

Subsidiary Template

SOPInstance[*]

observation

1..1

SHALL

@

@classCode

1..1

SHALL

CS

SHALL

DGIMG

@

@moodCode

1..1

SHALL

CS

SHALL

EVN

>

template​Id

1..1

SHALL

II

>@

@root

1..1

SHALL

UID

SHALL

1.2.840.10008.9.18

SOPInstance​UID

>

id

1..*

SHALL

II

SOP Instance UID (0008,0018)

>

code

1..1

SHALL

CD

SOPClass​UID

>@

@code

1..1

SHALL

ST

SOP Class UID (0008,0016)

>@

@codeSystem

1..1

SHALL

UID

SHALL

1.2.840.10008.2.6.1

>

text

0..1

SHOULD

ED

>@

@mediaType

1..1

SHALL

ST

SHALL

application/dicom

WADOReference

>>

reference

1..1

SHALL

URL

>

effective​Time

0..1

SHOULD

TS

Instance Creation Date (0008,0012) + Instance Creation Time (0008,0013) + Timezone Offset From UTC (0008,0201)

>

entry​Relationship

0..*

COND

>@

@typeCode

1..1

SHALL

CS

SHALL

SUBJ

SOPInstance[*]

>>

observation

1..1

SHALL

10.8 SOP Instance Observation 1.2.840.10008.9.18

>

entry​Relationship

0..1

COND

>@

@typeCode

1..1

SHALL

CS

SHALL

RSON

>>

observation

1..1

SHALL

>>@

@classCode

1..1

SHALL

CS

SHALL

OBS

>>@

@moodCode

1..1

SHALL

CS

SHALL

EVN

>>>

code

1..1

SHALL

CD

SHALL

(ASSERTION, ActCode [2.16.840.1.113883.5.4], "Assertion")

Purpose​Of​Reference

>>>

value

1..1

SHALL

CD

SHALL

CWE

DYNAMIC

ValueSet CID 7003 “Diagnostic Imaging Report Purpose of Reference”

>

entry​Relationship

0..1

COND

>@

@typeCode

1..1

SHALL

CS

SHALL

COMP

>>

observation

1..1

SHALL

>>@

@classCode

1..1

SHALL

CS

SHALL

ROIBND

>>@

@moodCode

1..1

SHALL

CS

SHALL

EVN

>>

code

1..1

SHALL

CD

SHALL

(121190, DCM, "Referenced Frames")

>>

entry​Relationship

1..1

SHALL

>>@

@typeCode

1..1

SHALL

CS

SHALL

COMP

>>>

observation

1..1

SHALL

>>>@

@classCode

1..1

SHALL

CS

SHALL

OBS

>>>@

@moodCode

1..1

SHALL

CS

SHALL

EVN

>>>

code

1..1

SHALL

CD

SHALL

(113036, DCM, "Frames for Display")

Referenced​Frames

>>>

value

1..1

SHALL

LIST <INT>

10.8.1 entryRelationship

COND: entryRelationship SHALL NOT be present in a 10.8 SOP Instance Observation included within a 9.8.7 DICOM Object Catalog section, and MAY be present otherwise.

10.8.1.1 entryRelationship/@typeCode=SUBJ (SOP Instance)

This template recursively invokes itself to allow a Presentation State SOP Instance reference to identify the target Image SOP Instances, or for a derived Image to reference its source Image, or similar linkages between instances.

Note

This is generally not required, as the DICOM SOP Instance itself identifies relationships to the relevant other SOP Instances.

10.8.1.2 entryRelationship/@typeCode=RSON (Purpose of Reference)

A Purpose of Reference Observation describes the purpose of the DICOM composite object reference. Appropriate codes, such as externally defined DICOM codes, may be used to specify the semantics of the purpose of reference. When this observation is absent, it implies that the reason for the reference is unknown.

Note

In Consolidated CDA r1.1, this was defined using a separate "Purpose of Reference Observation" template, which is included directly in this template specification.

10.8.1.3 entryRelationship/@typeCode=COMP (Referenced Frames)

A Referenced Frames Observation contains a list of integer values for the referenced frames of a DICOM multi-frame image SOP instance. It identifies the frame numbers within the referenced SOP instance to which the reference applies. The observation identifies frames using the same convention as DICOM, with the first frame in the referenced object being Frame 1. A Referenced Frames Observation must be used if a referenced DICOM SOP instance is a multi-frame image and the reference does not apply to all frames.

Note

In Consolidated CDA r1.1, this was defined using separate "Referenced Frames Observation" and "Boundary Observation" templates, which are included directly in this template specification.

Example 10.8-1. SOP instance observation example with purpose of reference 

<observation classCode="DGIMG" moodCode="EVN">
    <templateId root="1.2.840.10008.9.18"/>
    <id root="1.2.840.113619.2.62.994044785528.20060823.200608232232322.3"/>
    <code code="1.2.840.10008.5.1.4.1.1.1"
        codeSystem="1.2.840.10008.2.6.1" codeSystemName="DCMUID"
        displayName="Computed Radiography Image">
    </code>
    <text mediaType="application/dicom">
        <reference value="http://www.example.org/wado?requestType=WADO
            &amp;studyUID=1.2.840.113619.2.62.994044785528.114289542805
            &amp;seriesUID=1.2.840.113619.2.62.994044785528.20060823223142485051
            &amp;objectUID=1.2.840.113619.2.62.994044785528.20060823.200608232232322.3
            &amp;contentType=application/dicom"/>
        <!--reference to image 1 (PA) -->
    </text>
    <effectiveTime value="20060823223232"/>
    <entryRelationship typeCode="RSON">
        <observation classCode="OBS" moodCode="EVN">
            <templateId root="2.16.840.1.113883.10.20.6.2.9"/>
            <code code="ASSERTION" codeSystem="2.16.840.1.113883.5.4"/>
            <value xsi:type="CD" code="121112"
                codeSystem="1.2.840.10008.2.16.4"
                codeSystemName="DCM"
                displayName="Source of Measurement"/>
        </observation>
    </entryRelationship>
</observation>

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