DICOM PS3.7 2021c - Message Exchange

9.3.2.3 C-CANCEL-FIND-RQ (Current)
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#### 9.3.2.3 C-CANCEL-FIND-RQ

The C-CANCEL-FIND-RQ Message contains fields as defined in Table 9.3-5. Each field shall conform to DICOM encoding and Value Representation as defined in PS3.5. Fields are required as specified in the C-FIND service definition unless otherwise noted in Table 9.3-5. Fields not specified in the C-FIND service definition but present in Table 9.3-5 are required by the DIMSE-C protocol.

Table 9.3-5. C-CANCEL-FIND-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.
Command Field | (0000,0100) | US | 1 | This field distinguishes the DIMSE-C operation conveyed by this Message. The value of this field shall be set to 0FFFH for the C-CANCEL-FIND-RQ 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 C-FIND-RQ Message.
Command Data Set Type | (0000,0800) | US | 1 | This field indicates that no Data Set is present in the Message and shall be set to a value of 0101H.

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DICOM PS3.7 2021c - Message Exchange