L.4.3 Directory Information in DICOMDIR
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### L.4.3 Directory Information in DICOMDIR

The Directory shall include Directory Records of PATIENT, STUDY, SERIES, IMAGE corresponding to the information object files in the File Set. All DICOM files in the File Set incorporating SOP Instances (Information Objects) defined for the specific Application Profile shall be referenced by Directory Records.

### Note

DICOMDIRs with no directory information are not allowed by these Application Profiles.

There may only be one DICOMDIR file per File Set. The Patient ID at the patient level shall be unique for each patient directory record in one File Set.

#### L.4.4.1 Additional Keys

No additional keys are specified.

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