DICOM PS3.7 2019a - Message Exchange

10.3.5 N-CREATE Protocol

The information necessary for the N-CREATE request and indication DIMSE-N primitives are conveyed in the N-CREATE-RQ Message. The information necessary for the N-CREATE response and confirmation DIMSE-N primitives are conveyed in the N-CREATE-RSP Message.

10.3.5.1 N-CREATE-RQ

The N-CREATE-RQ Message contains fields as defined in Table 10.3-9. Each field shall conform to DICOM encoding and Value Representation as defined in PS3.5. Fields are required as specified in the N-CREATE service definition unless otherwise noted in Table 10.3-9. Fields not specified in the N-CREATE service definition but present in Table 10.3-9 are required by the DIMSE-N protocol.

Table 10.3-9. N-CREATE-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.

Affected SOP Class UID

(0000,0002)

UI

1

SOP Class UID of the SOP Instance to be created.

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 0140H for the N-CREATE-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 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.

Affected SOP Instance UID

(0000,1000)

UI

1

Contains the UID of the SOP Instance to be created.

Attribute 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 Attribute 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