This Annex provides an example of a File content that is based on selected aspects of the example introduced in PS3.3 for the Basic Directory Information Object. This is not a normative Annex. It is only an illustration, which is simply intended to help the reader better understand the organization of a DICOM Directory stored in a DICOMDIR File.
Table A.1-1 shows in a simplified manner, the content of a simple DICOMDIR File. Values of elements are noted between square brackets (e.g., [1.2.840.10008.34.7.6]). Byte Offsets are shown by symbolic Values noted between brackets (e.g., {1493}).
Table A.1-1. Directory Content Example
|
Meta-Info |
128 bytes 4 bytes 0002,0000 0002,0001 0002,0002 0002,0003 0002,0010 0002,0012 ... |
File Preamble [all bytes set to 00H] DICOM Prefix [DICM] Group Length File Meta-Information Version [0001] SOP Class UID [1.2.840.10008.1.3.10] SOP Instance UID [1.2.840.23856.36.45.3] Transfer Syntax UID [1.2.840.10008.1.1] Implementation Class UID [1.2.840.23856.34.90.3] ... |
|
|
File-set Identification |
0004,1130 ... |
File-set ID [EXAMPLE] ... |
|
|
General Directory Information |
0004,1200 0004,1202 0004,1212 ... 0004,1220 |
Offset of First Record of Root Directory Entity {1829} Offset of Last Record of Root Directory Entity {6F18} File-set Consistency Flag [0000H] ... Directory Record Sequence. This Data Element Value includes the following Sequence of Items. |
|
|
{1829} |
Item Tag |
FFFE,E000 |
Item Data Element (includes the following Data Elements) |
|
Study 1 Directory Record |
0004,1400 0004,1410 0004,1420 ... |
Offset of the next Dir. Record in Dir. Entity (not shown in example) Record In-use Flag [FFFFH] Offset of Referenced Lower Level Directory Entity {2299} ... |
|
|
0004,1430 |
Directory Record Type [STUDY] |
||
|
Selection Keys |
0020,000D 0020,0010 ... |
Study Instance UID [1.2.840.4656.23.4568745] Study ID [srt78UJ] .... |
|
|
Item Del. Tag |
FFFE,E00D |
Item Delimitation Tag is present only if Item is of undefined length |
|
|
{2299} |
Item Tag |
FFFE,E000 |
Item Data Element (includes the following Data Elements) |
|
Series 1 Directory Record |
0004,1400 0004,1410 0004,1420 ... |
Offset of the next Dir. Record in Dir. Entity (not shown in example) Record In-use Flag [0FFFFH] Offset of Referenced Lower Level Directory Entity {2681} ... |
|
|
0004,1430 |
Directory Record Type [SERIES] |
||
|
Selection Keys |
0008,0060 0020,0011 ... |
Modality [NM] Series Number [2] ... |
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|
Item Del. Tag |
FFFE,E00D |
Item Delimitation Tag is present only if Item is of undefined length |
|
|
{2681} |
Item Tag |
FFFE,E000 |
Item Data Element (includes the following Data Elements) |
|
Image 1 Directory Record |
0004,1400 0004,1410 0004,1420 ... |
Offset of the next Dir. Record in Dir. Entity {3419} Record In-use Flag [FFFFH] Offset of Referenced Lower Level Directory Entity [00000000H] ... |
|
|
0004,1430 |
Directory Record Type [IMAGE] |
||
|
0004,1500 0004,1510 0004,1511 0004,1512 |
Referenced File ID [DIR\TDRI\3856G3] Referenced SOP Class UID in File [1.2.840.10008.5.1.4.1.1.5] Referenced SOP Instance UID in File [1.2.840.34.56.78999654.234] Referenced Transfer Syntax UID in File [1.2.840.10008.1.2.1] |
||
|
Selection Keys |
0008,0018 0020,0013 ... |
Image SOP Instance UID [1.2.840.34.56.78999654.234] Image Number [1] ... |
|
|
Item Del. Tag |
FFFE,E00D |
Item Delimitation Tag is present only if Item is of undefined length |
|
|
{3419} |
Item Tag |
FFFE,E000 |
Item Data Element (includes the following Data Elements) |
|
Image 2 Directory Record |
0004,1400 0004,1410 0004,1420 ... |
Offset of the next Dir. Record in Dir. Entity (not shown in example) Record In-use Flag [FFFFH] Offset of Referenced Lower Level Directory Entity [00000000H] ... |
|
|
0004,1430 |
Directory Record Type [IMAGE] |
||
|
0004,1500 0004,1510 0004,1511 0004,1512 |
Referenced File ID [DIR\TDRI\3856G7] Referenced SOP Class UID in File [1.2.840.10008.5.1.4.1.1.5] Referenced SOP Instance UID in File [1.2.840.34.56.78999654.235] Referenced Transfer Syntax UID in File [1.2.840.10008.1.2.2] |
||
|
Selection Keys |
0008,0018 0020,0013 ... |
Image SOP Instance UID [1.2.840.34.56.78999654.235] Image Number [2] ... |
|
|
Item Del. Tag |
FFFE,E00D |
Item Delimitation Tag is present only if Item is of undefined length |
|
|
{6F18} |
Item Tag |
FFFE,E000 |
Item Data Element (includes the following Data Elements) |
|
Patient C Directory Record |
0004,1400 0004,1410 0004,1430 ... |
Offset of the next Dir. Record in Dir. Entity {00000000H} Record In-use Flag [FFFFH] Directory Record Type [PATIENT] ... |
|
|
Selection Keys |
0010,0010 0010,0020 .... |
Patient Name [Patient C] Patient ID [523-61-8765] .... |
|
|
Item Del. Tag |
FFFE,E00D |
Item Delimitation Tag is present only if Item is of undefined length |
|
|
Sequence Delimitation Tag |
FFFE,E0DD |
Used only if the Directory Record Sequence (0004,1220) is of undefined length to delimit the end of the Value of the Directory Record Sequence Data Element. |