DCMTK

The following excerpt is from DICOM PS 3.5 Section 6.1.2.3:

The Unicode and GB18030 standards have distinct Yen symbol, backslash, and several forms of reverse solidus. The separator for multi-valued data elements in DICOM is the character valued 05/12 regardless of what glyph is used to enter or display this character. The other reverse solidus characters that have a very similar appearance are not separators. The choice of font can affect the appearance of 05/12 significantly. Multi-byte encoding systems, such as GB18030, GBK and ISO 2022, may generate encodings that contain a byte valued 05/12. Only the character that encodes as a single byte valued 05/12 is a delimiter.

It is not sure whether the DcmSpecificCharacterSet class handles the backslash (and other delimiters) correctly for multi-byte character sets such as ISO 2022 IR 87, GB18030 and GBK.

See sample datasets from Bhuvan Bose (sent by email).