DICOM PS3.4 2017e - Service Class Specifications

S.3.2.3.2 Service Class User Behavior
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##### S.3.2.3.2 Service Class User Behavior

The SCU shall use the N-ACTION primitive to request the SCP to cancel the media creation request corresponding to the Affected SOP Instance UID in the N-ACTION request primitive, whether or not it has been initiated with an N-ACTION Initiate Media Creation request, and whether or not it has begun to be processed (i.e., is pending or in progress).

Upon receipt of a successful N-ACTION Response Status Code from the SCP, the SCU knows that the SCP has received the N-ACTION Cancel Media Creation request, has canceled any pending or in progress media creation, and deleted the Media Creation Management SOP Instance.

### Note

Successful cancellation implies that a subsequent N-GET of the corresponding Media Creation Management SOP Instance would fail.

Upon receipt of a failure N-ACTION Response Status Code from the SCP, the SCU knows that the SCP will not process the Cancel Media Creation request. The actions taken by the SCU upon receiving the status is beyond the scope of this Standard.

### Note

Cancellation failure implies that media creation has already completed (successfully or not), or will proceed. The status of the media creation request may still be obtained with an N-GET, unless the reason for failure was that the SOP Instance did not exist.

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DICOM PS3.4 2017e - Service Class Specifications