F.5.2 Study Directory record definition

The Directory Record is based on the specification of Section F.3. It is identified by a Directory Record Type of Value "STUDY." Table F.5-2 lists the set of keys with their associated Types for such a Directory Record Type. The description of these keys may be found in the Modules related to the Study IE of Composite IODs. This Type of Directory Record may reference a Lower-Level Directory Entity that includes one or more Directory Records as defined in Table F.4-1. Only one Study Directory Record per Study Instance UID shall be present in a Basic Directory Instance; this implies that a study belongs to a single patient and shall be referenced only once for that patient.

Table F.5-2STUDY KEYS

Key Tag Type Attribute Description
Specific Character Set (0008,0005) 1C Required if an extended or replacement character set is used in one of the keys
Study Date (0008,0020) 1
Study Time (0008,0030) 1
Study Description (0008,1030) 2
Study Instance UID (0020,000D) 1C Required only if (0004,1511) is absent. (See Note)
Study ID (0020,0010) 1
Accession Number (0008,0050) 2
Any other Attribute of the Study IOD or Study IE Modules 3

Note: The Study Instance UID shall be present as a mandatory key only if no file is referenced by this Directory Record. In the case where this Directory Record references a file, the Directory Record contains in the Referenced SOP Instance UID in File (0004,1511). In this case (0004,1511) may be used as a "pseudo" Directory Record Key (See Table F.3-3) and need not be duplicated.