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.5-2. Study 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 IE Modules |
3 |
||
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.