This is the ValueSet that contains all the codes in AcquisitionModality (http://dicom.nema.org/medical/dicom/current/output/chtml/part16/sect_CID_29.html) and Acquisition Modality (https://twcore.mohw.gov.tw/ig/twcore/ValueSet/AcquisitionModality). E.g. what you have to deal with if you get resources containing codes in either of them