DICOM attributes provide the length and then the data. When writing data to a file, you
can include a two-letter value representation (VR) with the attribute or you can let DICOM
infer the value representation from the data dictionary. When you specify the VR option with
the value 'explicit'
, the dicomwrite
function includes
the VR in the attribute. The following figure shows the attributes with and without the
VR.