DICOM PS3.17 2021c - Explanatory Information

K.5.3 Extra-protocol Image Identification (Current)
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### K.5.3 Extra-protocol Image Identification

At any Stage of a Staged Protocol exam, the operator may acquire images that are not part of the Protocol. These images are so-called "extra-Protocol images". Information regarding the performed Protocol is still included because such images are acquired in the same Procedure Step as the Protocol images. The Stage number and optionally other Stage identification Attributes (Stage Name and/or Stage Code Sequence) should still be conveyed in extra-Protocol images. However, the View number should be omitted to signify that the image is not one of the standard Views in the Protocol. Other View identifying information, such as name or code sequences, may indicate the image location.

Table K.5-2. Comparison Of Protocol And Extra-Protocol Image Attributes Example

Mid-Stress Stage - View 1 Protocol Image | Mid-Stress Stage Extra-Protocol Image
--- | ---
Study Instance UID: "1.2.840….123.1" | Study Instance UID: "1.2.840….123.1"
Request Attributes Sequence: | Request Attributes Sequence:
>Scheduled Procedure Step Description: " Exercise stress echocardiography protocol" | >Scheduled Procedure Step Description: " Exercise stress echocardiography protocol"
>Scheduled Protocol Code Sequence: | >Scheduled Protocol Code Sequence:
>>Code Value: " 433233004" | >>Code Value: " 433233004"
>>Coding Scheme Designator: "SCT" | >>Coding Scheme Designator: "SCT"
>>Code Meaning:" Exercise stress echocardiography" | >>Code Meaning:" Exercise stress echocardiography"
Performed Procedure Step Description: "Exercise stress echocardiography" | Performed Procedure Step Description: "Exercise stress echocardiography"
Protocol Name: "EXERCISE STRESS-ECHO" | Protocol Name: "EXERCISE STRESS-ECHO"
Performed Protocol Code Sequence: | Performed Protocol Code Sequence:
>Code Value: "433233004" | >Code Value: "433233004"
>Coding Scheme Designator: "SCT" | >Coding Scheme Designator: "SCT"
>Code Meaning:" Exercise stress echocardiography" | >Code Meaning:" Exercise stress echocardiography"
Number of Stages: "4" | Number of Stages: "4"
Number of Views In Stage: "2" | Number of Views In Stage: "2"
Stage Name: "MID-STRESS" | Stage Name: "MID-STRESS"
Stage Number: "2" | Stage Number: "2"
Stage Code Sequence: | Stage Code Sequence:
>Code Value: "109091" | >Code Value: "109091"
>Coding Scheme Designator: "DCM" | >Coding Scheme Designator: "DCM"
>Code Meaning: "Cardiac Stress state" | >Code Meaning: "Cardiac Stress state"
View Name: "Para-sternal long axis" | ----
View Number: "1" | ----
View Code Sequence: | ----
>Code Value: "399139001" | ----
>Coding Scheme Designator: "SCT" | ----
>Code Meaning: "Parasternal long axis" | ----

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DICOM PS3.17 2021c - Explanatory Information