DICOM PS3.7 2019a - Message Exchange

10.3.3 N-SET Protocol

The information necessary for the N-SET request and indication DIMSE-N primitives are conveyed in the N-SET-RQ Message. The information necessary for the N-SET response and confirmation DIMSE-N primitives are conveyed in the N-SET-RSP Message. Fields not specified in the N-SET service definition but present in Table 10.3-3 are required by the DIMSE-N protocol.

10.3.3.1 N-SET-RQ

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

Table 10.3-5. N-SET-RQ 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.

Requested SOP Class UID

(0000,0003)

UI

1

SOP Class UID of the SOP Instance for which Attribute values are to be modified.

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 0120H for the N-SET-RQ Message.

Message ID

(0000,0110)

US

1

Implementation-specific value that distinguishes this Message from other Messages.

Command Data Set Type

(0000,0800)

US

1

This field indicates that a Data Set is present in the Message. It shall be set to any value other than 0101H (Null).

Requested SOP Instance UID

(0000,1001)

UI

1

Contains the UID of the SOP Instance for which Attribute values are to be modified.

Modification List

(no tag)

-

-

This field is encoded as a Data Set. One Data Element is encoded for each Attribute and Attribute Value applicable to the operation.


Note

The permitted contents of Modification List, encoded as a series of Data Elements, are defined in the Information Object Definition (PS3.3) and Service Class Specifications (PS3.4).

DICOM PS3.7 2019a - Message Exchange