The response shall be an HTTP Response Message as specified in IETF RFC7230.
The content of the message-body varies according to the Media type as defined below.
The body content shall be a "Part 10 File" that includes a meta-header as defined in PS3.10.
The returned DICOM object shall be encoded using one of the transfer syntaxes specified in the transfer syntax query parameter as defined in Section 8.2.11 below. By default, the transfer syntax shall be "Explicit VR Little Endian".
This implies that retrieved images are sent uncompressed by default.