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
PatientMModule - Patient
Clinical Trial SubjectUModule - Patient
General StudyMModule - Study
Patient StudyUModule - Study
Clinical Trial StudyUModule - Study
General SeriesMModule - Series
Clinical Trial SeriesUModule - Series
Stereometric SeriesMModule - Series
General EquipmentMModule - Equipment
Stereometric RelationshipMModule - Stereometric Relationship
Common Instance ReferenceMModule - Stereometric Relationship
SOP CommonMModule - Stereometric Relationship
(0008,0005) Specific Character Set1CCode String
(0008,0012) Instance Creation Date3Date
(0008,0013) Instance Creation Time3Time
(0008,0014) Instance Creator UID3Unique Identifier
(0008,0015) Instance Coercion DateTime3Date Time
(0008,0016) SOP Class UID1Unique Identifier
(0008,0018) SOP Instance UID1Unique Identifier
(0008,001A) Related General SOP Class UID3Unique Identifier
(0008,001B) Original Specialized SOP Class UID3Unique Identifier
(0008,001C) Synthetic Data3Code String
(0008,0053) Query/Retrieve View1CCode String
(0008,0110) Coding Scheme Identification Sequence3Sequence
(0008,0123) Context Group Identification Sequence3Sequence
(0008,0124) Mapping Resource Identification Sequence3Sequence
(0008,0201) Timezone Offset From UTC3Short String
(0008,0300) Private Data Element Characteristics Sequence3Sequence
(0018,9004) Content Qualification3Code String
(0018,990C) Referenced Defined Protocol Sequence1CSequence
(0018,990D) Referenced Performed Protocol Sequence1CSequence
(0018,A001) Contributing Equipment Sequence3Sequence
(0020,0013) Instance Number3Integer String
(0020,9172) Conversion Source Attributes Sequence1CSequence
(0028,0303) Longitudinal Temporal Information Modified3Code String
(0040,A390) HL7 Structured Document Reference Sequence1CSequence
(0100,0410) SOP Instance Status3Code String
(0100,0420) SOP Authorization DateTime3Date Time
(0100,0424) SOP Authorization Comment3Long Text
(0100,0426) Authorization Equipment Certification Number3Long String
(0400,0500) Encrypted Attributes Sequence1CSequence
(0400,0561) Original Attributes Sequence3Sequence
(0400,0550) Modified Attributes Sequence1Sequence
(0400,0551) Nonconforming Modified Attributes Sequence3Sequence
(0400,0562) Attribute Modification DateTime1Date Time
(0400,0563) Modifying System1Long String
(0400,0564) Source of Previous Values2Long String
(0400,0565) Reason for the Attribute Modification1Code String
(0400,0600) Instance Origin Status3Code String
(2200,0005) Barcode Value3Long Text
(4FFE,0001) MAC Parameters Sequence3Sequence
(FFFA,FFFA) Digital Signatures Sequence3Sequence
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
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.

Original Attributes Sequence Attribute

TypeOptional (3)
Value Multiplicity1
Value RepresentationSequence (SQ)

Sequence of Items containing all Attributes that were added, removed or replaced by other values in the top level Data Set.

See Section C.

One or more Items are permitted in this Sequence.

Section C.

C. Original Attributes Sequence and Instance Coercion DateTime

Every transfer of a SOP Instance may result in Attribute coercion (see Section B.4.1.3 “Coercion of Attributes” in PS3.4) by the receiving application. The receiving application may also detect and correct errors in SOP Instances to bring them into conformance with the SOP Class definition without changing the SOP Instance UID or creating a derived Instance (see status Warning in Section “Status” in PS3.7 and Section B.2.3 “Statuses” in PS3.4.

When performing coercion, correction or conversion, the application may set Instance Coercion DateTime (0008,0015) to the current datetime. When performing such actions, the application may add an Item to the Original Attributes Sequence (0400,0561) describing the change and the prior values of replaced or removed Attributes. Any existing Items in the Original Attributes Sequence shall be preserved.


  1. Attributes may also be coerced, corrected or converted outside the context of transfer (e.g., while being managed in a storage system). For example, see the IHE Patient Information Reconciliation Integration Profile [IHE RAD TF-1]. Such updates may also be recorded in the Instance Coercion DateTime (0008,0015) and Original Attributes Sequence (0400,0561).

  2. If Patient ID (0010,0020) is included in the Modified Attributes Sequence (0400,0550), inclusion of Issuer of Patient ID (0010,0021), even if unchanged, or absent in the original, can more precisely identify the context of the replaced value.

Table C. defines the Attributes of the Original Attributes Sequence (0400,0561).

Table C. Original Attributes Macro Attributes

Attribute Name



Attribute Description

Original Attributes Sequence



Sequence of Items containing all Attributes that were added, removed or replaced by other values in the top level Data Set.

See Section C.

One or more Items are permitted in this Sequence.

>Source of Previous Values



The source that provided the SOP Instance prior to the removal or replacement of the values. For example, this might be the Institution from which imported SOP Instances were received.

>Attribute Modification DateTime



Date and time the Attributes were replaced, added or removed.

>Modifying System



Identification of the system that replaced, added or removed the Attributes.

>Reason for the Attribute Modification



Reason for the Attribute modification.

Defined Terms:


Replace, add or remove values of Attributes such as Patient Name, ID, Accession Number, for example, during import of media from an external institution, or reconciliation against a master patient index.


Replace or remove incorrect values, or add correct values, such as Patient Name or ID, for example, when incorrect worklist item was chosen or operator input error.


Replace, add, or remove values of Attributes during a conversion, for example, of private DICOM objects to a standard SOP Class.

>Modified Attributes Sequence



Sequence that contains all the Attributes, with their previous values, that were modified or removed from the top level Data Set.

See Section C.

Only a single Item shall be included in this Sequence.

>>Any Attribute from the top level Data Set that was modified or removed.


May include Sequence Attributes and their Items.

>Nonconforming Modified Attributes Sequence



Attributes that were replaced or removed from the Data Set because the values were not conformant to the Attribute's Value Representation or Value Multiplicity.

See Section C.

One or more Items are permitted in this Sequence, one Item for each nonconforming Attribute.

>>Include Table 10-20 “Selector Attribute Macro Attributes”

Pointer to Attribute in Modified Attributes Sequence (0400,0550) that had a nonconforming value.

>>Nonconforming Data Element Value



The original Value of the nonconforming Attribute.

C. Modified Attributes Sequence

Attributes that were replaced, added or removed shall be placed in the Modified Attributes Sequence (0400,0550) with their prior values. If an Attribute within a Sequence was replaced, added or removed, the entire prior value of the Sequence shall be placed in the Modified Attributes Sequence (0400,0550); this applies recursively up to the enclosing Sequence Attribute in the top level Data Set.

Attributes that were empty or absent and for which values have been added may be present in the Modified Attributes Sequence (0400,0550) with a zero length value.

If an Attribute was replaced, added or removed because its value was nonconforming to its Value Representation or Value Multiplicity, it shall be included in the Modified Attributes Sequence (0400,0550) with a zero length value.

Any Private Data Elements present in the Item shall be accompanied by their respective Private Data Element Creator Attribute.

C. Nonconforming Modified Attributes Sequence

If an Attribute Value was replaced or removed because its value was nonconforming to its Value Representation or Value Multiplicity, the original value (which was replaced by a zero length value in the Modified Attributes Sequence) may be recorded in the Nonconforming Modified Attributes Sequence (0400,0551).

The nonconforming Attribute is identified by the Attributes of the Selector Attribute Macro. Because a single Attribute is being identified, Selector Attribute (0072,0026) shall be present.

The Data Set to which the Selector Attribute Macro applies is the single Item of the Modified Attributes Sequence (0400,0550) within the same Item of the Original Attributes Sequence (0400,0561). Therefore, the Modified Attributes Sequence (0400,0550) is not identified in the Selector Sequence Pointer (0072,0052).


  1. This is effectively the same as a pointer to the equivalent Attribute in the original top level Data Set.

  2. Characters in text Attributes non-conformant to the identified Specific Character Set (0008,0005) may be considered non-conformant to the VR.

  3. For example, if Body Part Examined (0018,0015) had a nonconforming value, the Nonconforming Modified Attributes Sequence (0400,0551) Item would have the Attributes:



    Selector Attribute



    Selector Value Number



    Nonconforming Data Element Value

  4. The Nonconforming Data Element Value (0400,0552) has Value Representation OB, which allows an arbitrary byte string to be encoded.