DICOM PS3.8 2019a - Network Communication Support for Message Exchange
9.3.2.2.2 Transfer Syntax Sub-Item Structure (Current)
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PS3.8 > DICOM Upper Layer Protocol for TCP/IP > DICOM Upper Layer Protocol for TCP/IP Data Units Structure > A-ASSOCIATE-RQ PDU Structure > Presentation Context Item Structure > Transfer Syntax Sub-Item Structure
9.3.2.2.2 Transfer Syntax Sub-Item Structure

The Transfer Syntax Sub-Item shall be made of a sequence of mandatory fixed length fields followed by a variable field. Table 9-15 shows the sequence of the mandatory fields.

Table 9-15. Transfer Syntax Sub-Item Fields

Item bytes

Field name

Description of field

1

Item-type

40H

2

Reserved

This reserved field shall be sent with a value 00H but not tested to this value when received.

3-4

Item-length

This Item-length shall be the number of bytes from the first byte of the following field to the last byte of the Transfer-syntax-name field(s). It shall be encoded as an unsigned binary numbers

5-xxx

Transfer-syntax-name(s)

This variable field shall contain the Transfer-syntax-name proposed for this presentation context. A valid Transfer-syntax-name shall be encoded as defined in Annex F. For a description of the use of this field see Section 7.1.1.13. Transfer-syntax-names are structured as UIDs as defined in PS3.5 (see Annex B for an overview of this concept). DICOM Transfer-syntax-names are registered in PS3.5.

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DICOM PS3.8 2019a - Network Communication Support for Message Exchange