B.3.3 Directory Information in DICOMDIR
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### B.3.3 Directory Information in DICOMDIR

Conformant Application Entities shall include in the DICOMDIR File a Basic Directory IOD containing Directory Records at the Patient and subsidiary levels appropriate to the SOP Classes in the File-set.

### Note

DICOMDIRs with no directory information are not allowed by this Application Profile.

#### B.3.3.1 Additional Keys

Table B.3-2 specifies the type of Directory Records that shall be supported and the additional associated keys. Refer to the Basic Directory IOD in PS3.3.

Table B.3-2. STD-XA1K Additional DICOMDIR Keys

Key Attribute | Tag | Directory Record Type | Type | Notes
--- | --- | --- | --- | ---
Patient's Birth Date | (0010,0030) | PATIENT | 2 |
Patient's Sex | (0010,0040) | PATIENT | 2 |
Institution Name | (0008,0080) | SERIES | 2 |
Institution Address | (0008,0081) | SERIES | 2 |
Performing Physicians' Name | (0008,1050) | SERIES | 2 |
Icon Image Sequence | (0088,0200) | IMAGE | 1 |
Image Type | (0008,0008) | IMAGE | 1C | Required if the SOP Instance referenced by the Directory Record is an XA Image.
Calibration Image | (0050,0004) | IMAGE | 2 |
Referenced Image Sequence | (0008,1140) | IMAGE | 1C | Required if the SOP Instance referenced by the Directory Record is an XA Image and has an Image Type (0008,0008) value 3 of BIPLANE A or BIPLANE B. May be present otherwise.
>Referenced SOP Class UID | (0008,1150) | IMAGE | 1C | Required if Referenced Image Sequence (0008,1140) is present
>Referenced SOP Instance UID | (0008,1155) | IMAGE | 1C | Required if Referenced Image Sequence (0008,1140) is present
>All other elements from Referenced Image Sequence (including Purpose of Reference Code Sequence and its content) | IMAGE | 3 |
Lossy image Compression Ratio | (0028,2112) | IMAGE | 1C | Required if present in image object with a non-zero length value.

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