The International Standards Organization (ISO/IEC JTC1/SC29/WG1) has prepared an International Standard, [ISO/IEC 18181-1] (JPEG XL), for the digital compression and coding of continuous-tone still images. This standard is known as the JPEG XL Standard.

A JPEG XL stream allows for bit depths up to 24 bits and up to 8192 components. Components do not need to all be the same type or bit depth. The color space of the image is specified in the JPEG XL encoding.

Inclusion of a JPEG XL coded image in a DICOM message is facilitated by the use of specific Transfer Syntaxes that are defined in Annex A.