Computed Radiography ImageCIOD
Nuclear Medicine ImageCIOD
Ultrasound ImageCIOD
Ultrasound Multi-frame ImageCIOD
Secondary Capture ImageCIOD
Multi-frame Single Bit Secondary Capture ImageCIOD
Multi-frame Grayscale Byte Secondary Capture ImageCIOD
Multi-frame Grayscale Word Secondary Capture ImageCIOD
Multi-frame True Color Secondary Capture ImageCIOD
X-Ray Angiographic ImageCIOD
X-Ray Radiofluoroscopic ImageCIOD
RT Structure SetCIOD
Positron Emission Tomography ImageCIOD
Digital X-Ray ImageCIOD
Digital Mammography X-Ray ImageCIOD
Digital Intra-Oral X-Ray ImageCIOD
RT Beams Treatment RecordCIOD
RT Brachy Treatment RecordCIOD
RT Treatment Summary RecordCIOD
VL Endoscopic ImageCIOD
VL Microscopic ImageCIOD
VL Slide-Coordinates Microscopic ImageCIOD
VL Photographic ImageCIOD
Video Endoscopic ImageCIOD
Video Microscopic ImageCIOD
Video Photographic ImageCIOD
VL Whole Slide Microscopy ImageCIOD
Real-Time Video Endoscopic ImageCIOD
Real-Time Video Photographic ImageCIOD
Dermoscopic Photography ImageCIOD
Grayscale Softcopy Presentation StateCIOD
Color Softcopy Presentation StateCIOD
Pseudo-Color Softcopy Presentation StateCIOD
Blending Softcopy Presentation StateCIOD
Basic Structured DisplayCIOD
XA/XRF Grayscale Softcopy Presentation StateCIOD
Advanced Blending Presentation StateCIOD
Variable Modality LUT Softcopy Presentation StateCIOD
Basic Voice Audio WaveformCIOD
Ambulatory ECGCIOD
Hemodynamic WaveformCIOD
Basic Cardiac Electrophysiology WaveformCIOD
Arterial Pulse WaveformCIOD
Respiratory WaveformCIOD
General Audio WaveformCIOD
Real-Time Audio WaveformCIOD
Routine Scalp ElectroencephalogramCIOD
Sleep ElectroencephalogramCIOD
Multi-channel Respiratory WaveformCIOD
Body Position WaveformCIOD
General 32-bit ECGCIOD
Basic Text SRCIOD
Enhanced SRCIOD
Comprehensive SRCIOD
Key Object Selection DocumentCIOD
Mammography CAD SRCIOD
Procedure LogCIOD
X-Ray Radiation Dose SRCIOD
Spectacle Prescription ReportCIOD
Macular Grid Thickness and Volume ReportCIOD
Implantation Plan SR DocumentCIOD
Comprehensive 3D SRCIOD
Radiopharmaceutical Radiation Dose SRCIOD
Extensible SRCIOD
Acquisition Context SRCIOD
Simplified Adult Echo SRCIOD
Patient Radiation Dose SRCIOD
Planned Imaging Agent Administration SRCIOD
Performed Imaging Agent Administration SRCIOD
Rendition Selection DocumentCIOD
Enhanced X-Ray Radiation Dose SRCIOD
Enhanced MR ImageCIOD
MR SpectroscopyCIOD
Enhanced MR Color ImageCIOD
Raw DataCIOD
Enhanced CT ImageCIOD
Spatial RegistrationCIOD
Deformable Spatial RegistrationCIOD
Spatial FiducialsCIOD
Ophthalmic Photography 8 Bit ImageCIOD
Ophthalmic Photography 16 Bit ImageCIOD
Stereometric RelationshipCIOD
Hanging ProtocolCIOD
Encapsulated PDFCIOD
Encapsulated CDACIOD
Real World Value MappingCIOD
Enhanced XA ImageCIOD
Enhanced XRF ImageCIOD
RT Ion Beams Treatment RecordCIOD
Ophthalmic Tomography ImageCIOD
X-Ray 3D Angiographic ImageCIOD
X-Ray 3D Craniofacial ImageCIOD
Breast Tomosynthesis ImageCIOD
Enhanced PET ImageCIOD
Surface SegmentationCIOD
Color PaletteCIOD
Enhanced US VolumeCIOD
Lensometry MeasurementsCIOD
Autorefraction MeasurementsCIOD
Keratometry MeasurementsCIOD
Subjective Refraction MeasurementsCIOD
Visual Acuity MeasurementsCIOD
Ophthalmic Axial MeasurementsCIOD
Intraocular Lens CalculationsCIOD
Generic Implant TemplateCIOD
Implant Assembly TemplateCIOD
Implant Template GroupCIOD
RT Beams Delivery InstructionCIOD
Ophthalmic Visual Field Static Perimetry MeasurementsCIOD
Intravascular Optical Coherence Tomography ImageCIOD
Ophthalmic Thickness MapCIOD
Surface Scan MeshCIOD
Surface Scan Point CloudCIOD
Legacy Converted Enhanced CT ImageCIOD
Legacy Converted Enhanced MR ImageCIOD
Legacy Converted Enhanced PET ImageCIOD
Corneal Topography MapCIOD
Breast Projection X-Ray ImageCIOD
Parametric MapCIOD
Wide Field Ophthalmic Photography Stereographic Projection ImageCIOD
Wide Field Ophthalmic Photography 3D Coordinates ImageCIOD
Tractography ResultsCIOD
RT Brachy Application Setup Delivery InstructionCIOD
Planar MPR Volumetric Presentation StateCIOD
Volume Rendering Volumetric Presentation StateCIOD
Content Assessment ResultsCIOD
CT Performed Procedure ProtocolCIOD
CT Defined Procedure ProtocolCIOD
Protocol ApprovalCIOD
XA Performed Procedure ProtocolCIOD
XA Defined Procedure ProtocolCIOD
Ophthalmic Optical Coherence Tomography En Face ImageCIOD
Ophthalmic Optical Coherence Tomography B-scan Volume AnalysisCIOD
Encapsulated STLCIOD
Encapsulated OBJCIOD
Encapsulated MTLCIOD
RT Physician IntentCIOD
RT Segment AnnotationCIOD
RT Radiation SetCIOD
C-Arm Photon-Electron RadiationCIOD
Tomotherapeutic RadiationCIOD
Robotic-Arm RadiationCIOD
RT Radiation Record SetCIOD
RT Radiation Salvage RecordCIOD
C-Arm Photon-Electron Radiation RecordCIOD
Tomotherapeutic Radiation RecordCIOD
Robotic-Arm Radiation RecordCIOD
RT Radiation Set Delivery InstructionCIOD
RT Treatment PreparationCIOD
Enhanced RT ImageCIOD
Enhanced Continuous RT ImageCIOD
RT Patient Position Acquisition InstructionCIOD
Microscopy Bulk Simple AnnotationsCIOD
General EquipmentMModule - Equipment
InventoryMModule - Inventory
(0008,0023) Content Date1Date
(0008,0033) Content Time1Time
(0008,0400) Scope of Inventory Sequence2Sequence
(0008,0401) Inventory Purpose2Long Text
(0008,0402) Inventory Instance Description3Long Text
(0008,0403) Inventory Level1Code String
(0008,0420) Inventory Access End Points Sequence3Sequence
(0008,0421) Study Access End Points Sequence3Sequence
(0008,0422) Incorporated Inventory Instance Sequence2Sequence
(0008,0423) Inventoried Studies Sequence2Sequence
(0008,0005) Specific Character Set1CCode String
(0008,0020) Study Date2Date
(0008,0030) Study Time2Time
(0008,0050) Accession Number2Short String
(0008,0051) Issuer of Accession Number Sequence3Sequence
(0008,0054) Retrieve AE Title1CApplication Entity
(0008,0056) Instance Availability3Code String
(0008,0061) Modalities in Study2Code String
(0008,0063) Anatomic Regions in Study Code Sequence3Sequence
(0008,0090) Referring Physician's Name3Person Name
(0008,0096) Referring Physician Identification Sequence3Sequence
(0008,009C) Consulting Physician's Name3Person Name
(0008,009D) Consulting Physician Identification Sequence3Sequence
(0008,0404) Item Inventory DateTime1Date Time
(0008,0405) Removed from Operational Use1CCode String
(0008,0406) Reason for Removal Code Sequence2CSequence
(0008,0407) Stored Instance Base URI3URL
(0008,0419) File Set Access Sequence3Sequence
(0008,041F) Study Update DateTime2Date Time
(0008,0424) Inventoried Series Sequence2CSequence
(0008,1030) Study Description2Long String
(0008,1032) Procedure Code Sequence3Sequence
(0008,1048) Physician(s) of Record3Person Name
(0008,1049) Physician(s) of Record Identification Sequence3Sequence
(0008,1060) Name of Physician(s) Reading Study3Person Name
(0008,1062) Physician(s) Reading Study Identification Sequence3Sequence
(0008,1190) Retrieve URL1CURL
(0010,0010) Patient's Name2Person Name
(0010,0020) Patient ID2Long String
(0010,0021) Issuer of Patient ID3Long String
(0010,0024) Issuer of Patient ID Qualifiers Sequence3Sequence
(0010,0030) Patient's Birth Date2Date
(0010,0040) Patient's Sex2Code String
(0010,1001) Other Patient Names3Person Name
(0010,1002) Other Patient IDs Sequence3Sequence
(0020,000D) Study Instance UID1Unique Identifier
(0020,0010) Study ID2Short String
(0020,1206) Number of Study Related Series2Integer String
(0020,1208) Number of Study Related Instances2Integer String
(0088,0130) Storage Media File-set ID3Short String
(0400,0561) Original Attributes Sequence3Sequence
(0008,0426) Inventory Completion Status1Code String
(0008,0427) Number of Study Records in Instance1Unsigned Long
(0008,0428) Total Number of Study Records1UV
(0008,1195) Transaction UID1CUnique Identifier
SOP CommonMModule - Inventory
Photoacoustic ImageCIOD
Confocal Microscopy ImageCIOD
Confocal Microscopy Tiled Pyramidal ImageCIOD
Basic DirectoryCIOD

Built with by Innolitics, a team of medical imaging software developers.

Data synced with official DICOM standard on 18 April 2024. The DICOM Standard is under continuous maintenance, and the current official version is available at DICOM Parts 3, 4, and 6, © NEMA. Please note that the most recent PDF version of the standard is the official reference, and should checked when making technical decisions.

Item Inventory DateTime Attribute

TypeRequired (1)
Value Multiplicity1
Value RepresentationDate Time (DT)

DateTime of creation of the Inventory information for this Item. All Study Attributes in this Sequence Item are correct as of this DateTime. The value shall be at or after the Content Date (0008,0023) and Content Time (0008,0033) of this Inventory SOP Instance.


This Attribute may be used for Study record reconciliation. See Section YYYY.7.10 in PS3.17.

Section YYYY.7.10 in PS3.17

YYYY.7.10 Study Record Reconciliation

Within the tree of linked Inventory SOP Instances, a given Study may be referenced multiple times among the Inventoried Studies Sequence Items. The Items may have different content, but each Item is a complete record of the contents of the Study as known by the creator of that Item.

Differences in content may occur due to changes to the metadata or content (SOP Instances) of the Study during the production of the Inventory, or due to different Series of a Study being stored on different media or storage subsystems, or for other reasons. The application using an Inventory may need to reconcile such multiple occurrences.

DICOM is not prescriptive regarding methods of reconciliation, but the Inventory IOD does provide Attributes that can assist in the process, in particular the various timestamps associated with the Study content and the process of Inventory creation, as shown in Table YYYY.7-3. These timestamp Attributes might be used to establish a timeline of changes to Study content and metadata, and of record extraction for inclusion in the Inventory. For example, a Study record may differ from a record with an earlier Item Inventory DateTime (0008,0404) only with the presence of an additional Series whose Series Date (0008,0021) is after the prior Item Inventory DateTime (0008,0404). The later record might reasonably be considered to be a more current replacement. However, two Study records might have entirely different sets of Series, and in that case simply choosing one record based on timestamp is probably not correct; the Study records would have to be further evaluated for the underlying reason for the difference, and the records potentially merged in some way.

Table YYYY.7-3. Timestamp Attributes Assisting in Reconciliation



Content Date


Content Time


Inventoried Studies Sequence


>Item Inventory DateTime


>Study Update DateTime


>Original Attributes Sequence


>>Attribute Modification DateTime


>Inventoried Series Sequence


>>Series Date


>>Series Time


>>Original Attributes Sequence


>>>Attribute Modification DateTime


In general, a major factor in reconciling diverse records is a full understanding of how the repository system manages the storage of Studies, and which timestamps and change auditing data it actually records. The reconciliation process will typically need to account for such system design features, which are not conveyed in Inventory SOP Instance Attributes or in DICOM Conformance Statements.

Note that a task for Study record merge is reconciliation of access paths to stored SOP Instances of the Study. This may present challenges if the Study records link to different access methods, target folders, or container files. In the case of conflicting information, it may be necessary to disregard Study or Series level access specifications, and use only the access links to each SOP Instance of the Study as recorded in the Instance level record.

YYYY.7.10.1 Example - Deleted Study

An example will show the dependency on system design for Study record reconciliation. Consider two Inventories, a baseline made at time A and an increment made at a later time B, and during the intervening time a Study is deleted (perhaps because it was assigned to the wrong patient). The migration source storage system might have taken one of several approaches, with the associated result in the time B inventory (this is not an exhaustive list) :

  1. It marks the Study as deprecated, but otherwise retains the data - the time B incremental inventory includes the entire set of Study, Series, and Instance records, each with the Removed from Operational Use (0008,0405) Attribute value Y.

  2. It marks the Study as deprecated, and deletes all the Series and Instance data - the time B incremental inventory includes only the Study record with the Removed from Operational Use (0008,0405) Attribute value Y.

  3. It deletes the references to the Series and SOP Instances of the Study in the database, retains the Study level database record, but does not support a deprecation flag - the time B incremental inventory includes a Study item, but no Series items.

  4. It deletes all Study information, with only a record in an audit trail - the time B incremental inventory simply does not record the Study.

In cases 1) and 2), the consumer application knows exactly what has happened, and can make a determination whether to move the deprecated Study data to the migration target repository. That determination would be based, among other factors, on the data retention policies of the organization, and on the technical approach the target system takes to identifying and managing deleted Studies.

In case 3), it might not be clear just from the content of the Inventories what is the appropriate status of the Study. This is further complicated if the SOP Instance files listed in the time A baseline inventory are still accessible from storage, perhaps indicating that the Study was not supposed to be empty. If the consumer application knows that this is the expected behavior of the source system for Study deletion, it might proceed with migration in accordance with organizational policy. However, the application may need to consult external information, such as audit trails or human authorization, before proceeding.

In case 4), without an explicit Study record indicating deletion, the incremental Inventory record for a deleted Study is identical to a record for an unchanged Study (i.e., no record in the Inventory). The migration application would have no reason to suspect that the Study was deleted until it tries to migrate the SOP Instances, and cannot find them. Studies that have gone missing are a patient safety issue, as opposed to Studies that are known to have been deleted for a valid reason, and this situation may trigger an audit investigation.