DICOM PS3.7 2019b - Message Exchange

10.3.4.2 N-ACTION-RSP (Current)
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#### 10.3.4.2 N-ACTION-RSP

The N-ACTION-RSP Message contains fields as defined in Table 10.3-8 and Annex C. Each field shall conform to DICOM encoding and Value Representation as defined in PS3.5. Fields are required as specified in the N-ACTION service definition unless otherwise noted in Table 10.3-8. Fields not specified in the N-ACTION service definition but present in Table 10.3-8 are required by the DIMSE-N protocol.

Table 10.3-8. N-ACTION-RSP Message Fields

Message Field | Tag | VR | VM | Description of Field
--- | --- | --- | --- | ---
Command Group Length | (0000,0000) | UL | 1 | The even number of bytes from the end of the value field to the beginning of the next group.
Affected SOP Class UID | (0000,0002) | UI | 1 | SOP Class UID of the SOP Instance for which the action was performed.
Command Field | (0000,0100) | US | 1 | This field distinguishes the DIMSE-N operation conveyed by this Message. The value of this field shall be set to 8130H for the N-ACTION-RSP Message.
Message ID Being Responded To | (0000,0120) | US | 1 | Shall be set to the value of the Message ID (0000,0110) field used in associated N-ACTION-RQ Message.
Command Data Set Type | (0000,0800) | US | 1 | This field indicates if a Data Set is present in the Message. This field shall be set to the value of 0101H if no Data Set is present; any other value indicates a Data Set is included in the Message.
Status | (0000,0900) | US | 1 | The value of this field depends upon the status type. Annex C defines the encoding of the status types defined in the service definition.
Affected SOP Instance UID | (0000,1000) | UI | 1 | Contains the UID of the SOP Instance for which the action was performed.
Action Type ID | (0000,1008) | US | 1 | Values for this field are application-specific.
Action Reply | (no tag) | - | - | Application-specific Data Set containing additional information related to the operation.

### Note

1. Service Class Specifications contained in PS3.4 define the values needed for the Action Type ID (0000,1008) parameter.

2. Service Class Specifications contained in PS3.4 define the Data Set needed for the Action Reply parameter related to each defined Action Type ID.

3. Service Class Specifications contained in PS3.4 define the encoding of the Action Reply parameter.

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DICOM PS3.7 2019b - Message Exchange