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
PatientMModule - Patient
Clinical Trial SubjectUModule - Patient
General StudyMModule - Study
Patient StudyUModule - Study
Clinical Trial StudyUModule - Study
Encapsulated Document SeriesMModule - Series
Clinical Trial SeriesUModule - Series
General EquipmentMModule - Equipment
SC EquipmentMModule - Equipment
Encapsulated DocumentMModule - Encapsulated Document
(0008,0023) Content Date2Date
(0008,002A) Acquisition DateTime2Date Time
(0008,0033) Content Time2Time
(0008,1140) Referenced Image Sequence3Sequence
(0008,114A) Referenced Instance Sequence3Sequence
(0020,0013) Instance Number1Integer String
(0020,0062) Image Laterality3Code String
(0028,0301) Burned In Annotation1Code String
(0028,0302) Recognizable Visual Features3Code String
(0040,A040) Value Type1CCode String
(0040,A043) Concept Name Code Sequence2Sequence
(0040,A050) Continuity Of Content1CCode String
(0040,A360) Predecessor Documents Sequence3Sequence
(0040,A493) Verification Flag3Code String
(0040,A504) Content Template Sequence1CSequence
(0040,A525) Identical Documents Sequence3Sequence
(0040,A730) Content Sequence3Sequence
(0008,1199) Referenced SOP Sequence1Sequence
(0040,A010) Relationship Type1Code String
(0040,A032) Observation DateTime1CDate Time
(0040,A040) Value Type1Code String
(0040,A043) Concept Name Code Sequence1CSequence
(0040,A050) Continuity Of Content1Code String
(0040,A120) DateTime1CDate Time
(0040,A121) Date1CDate
(0040,A122) Time1CTime
(0040,A123) Person Name1CPerson Name
(0040,A124) UID1CUnique Identifier
(0040,A130) Temporal Range Type1Code String
(0040,A132) Referenced Sample Positions1CUnsigned Long
(0040,A138) Referenced Time Offsets1CDecimal String
(0040,A13A) Referenced DateTime1CDate Time
(0040,A160) Text Value1CUnlimited Text
(0040,A168) Concept Code Sequence1Sequence
(0040,A171) Observation UID3Unique Identifier
(0040,A300) Measured Value Sequence2Sequence
(0040,A301) Numeric Value Qualifier Code Sequence1CSequence
(0040,A504) Content Template Sequence1CSequence
(0040,A730) Content Sequence1CSequence
(0040,A801) Tabulated Values Sequence1Sequence
(0048,0301) Pixel Origin Interpretation1CCode String
(0070,0022) Graphic Data1Single
(0070,0023) Graphic Type1Code String
(0070,031A) Fiducial UID3Unique Identifier
(3006,0024) Referenced Frame of Reference UID1Unique Identifier
(0040,E001) HL7 Instance Identifier1CShort Text
(0040,E008) Document Class Code Sequence3Sequence
(0042,0010) Document Title2Short Text
(0042,0011) Encapsulated Document1Other Byte String
(0042,0012) MIME Type of Encapsulated Document1Long String
(0042,0013) Source Instance Sequence1CSequence
(0042,0014) List of MIME Types1CLong String
(0042,0015) Encapsulated Document Length3Unsigned Long
SOP CommonMModule - Encapsulated Document
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.

Content Sequence Attribute

TypeOptional (3)
Value Multiplicity1
Value RepresentationSequence (SQ)

A potentially recursively nested Sequence of Items that conveys structured content.

One or more Items are permitted in this Sequence.

See Section C. and Section C.24.2.2 for further explanation.

Section C.

C. Content Sequence and Relationship Type

Content Sequence (0040,A730) provides the hierarchical structuring of the Content Tree (see Section C.17.3.1) by recursively nesting Content Items. A parent (or source) Content Item has an explicit relationship to each child (or target) Content Item, conveyed by Relationship Type (0040,A010).

Table C.17.3-8 describes the Relationship Types between Source Content Items and the Target Content Items.

Table C.17.3-8. Relationship Type Definitions

Relationship Type


Definition and Example



Source Item contains Target Content Item.

E.g., CONTAINER "History" {CONTAINS: TEXT "mother had breast cancer", CONTAINS: IMAGE}.


Has Observation Context

Target Content Items shall convey any specialization of Observation Context needed for unambiguous documentation of the Source Content Item.

E.g., CONTAINER "Report" {HAS OBS CONTEXT: PNAME "Recording Observer" = "Smith^John^^Dr^"}.


Has Concept Modifier

Used to qualify or describe the Concept Name of the Source Content Item, such as to create a post-coordinated description of a concept, or to further describe a concept.

E.g., CODE "Chest X-Ray" {HAS CONCEPT MOD: CODE "View = PA and Lateral"}

E.g., CODE "Breast" {HAS CONCEPT MOD: TEXT "French Translation" = " Sein "}

E.g., CODE "2VCXRPALAT" {HAS CONCEPT MOD: TEXT "Further Explanation" = "Chest X-Ray, Two Views, Postero-anterior and Lateral"}.


Has Properties

Description of properties of the Source Content Item.

E.g., CODE "Mass" {HAS PROPERTIES: CODE "anatomic location", HAS PROPERTIES: CODE "diameter", HAS PROPERTIES: CODE "margin", …}.


Has Acquisition Context

The Target Content Item describes the conditions present during data acquisition of the Source Content Item.

E.g., IMAGE {HAS ACQ CONTEXT: CODE "contrast agent", HAS ACQ CONTEXT: CODE "position of imaging subject", …}.


Inferred From

Source Content Item conveys a measurement or other inference made from the Target Content Items. Denotes the supporting evidence for a measurement or judgment.

E.g., CODE "Malignancy" {INFERRED FROM: CODE "Mass", INFERRED FROM: CODE "Lymphadenopathy", …}.



Selected From

Source Content Item conveys spatial or temporal coordinates selected from the Target Content Item(s).

E.g., SCOORD "POLYLINE1,1 5,10 5,10 1,10 1,1" {SELECTED FROM: IMAGE}.


Section C.24.2.2

C.24.2.2 Content Sequence

Content Sequence (0040,A730) encodes structured content relevant to the Encapsulated Document (0042,0011). This allows structured data in DICOM encoded form to accompany or describe some or all of the contents of the otherwise opaque encapsulated document, and enables receiving implementations to extract that data, e.g., to tabulate numeric measurements, provide them as merge fields for dictation, or store them in a database.


Some encapsulated document formats may themselves have some structured content, e.g., the non-narrative part of an HL7 CDA object, or the XMP metadata of a PDF object. This mechanism allows a DICOM-aware system to extract data without needing to parse or understand what is encapsulated.

There is no expectation that all of the narrative or visually rendered content in the encapsulated document be replicated in a structured form in the Content Sequence (0040,A730), nor is it expected that all of the information in the Content Sequence (0040,A730) be present in the encapsulated document. E.g., the structured content might contain codes describing the encapsulated document, or the encapsulated document may contain observations that are not replicated in the structured content.

The use of the Content Sequence (0040,A730) follows the pattern established for Structured Reports, and each Item of the Sequence in the top level Data Set is a Content Item (see Section C.17.3.2 “Content Item Attributes”).

Each Item of the Sequence in the top level Data Set may, for instance, be a numeric measurement Content Item (see Section C.18.1 “Numeric Measurement Macro”). E.g.:

  • NUM (8821-1, LN, "Left Ventricular ED Volume") = 98 (mm3, UCUM, "mm3")

  • NUM (8808-8, LN, "Left Ventricular Ejection Fraction by Angiography") = 65 (%, UCUM, "Percent")

Alternatively, nested Content Items may be used in the manner of a typical Structured Report, and an appropriate Template from PS3.16 invoked (e.g., the TID 1500 Measurement Report Template), in which case the Concept Name Code Sequence (0040,A043) serves as Document Title and the name of the top level CONTAINER Content Item of the Structured Report, and such Content Items as measurements are nested within containers, may be related to regions of interest, given tracking identifiers, etc.