Computed Radiography ImageCIOD
CT ImageCIOD
MR ImageCIOD
Nuclear Medicine ImageCIOD
Ultrasound ImageCIOD
Ultrasound Multi-frame ImageCIOD
Secondary Capture ImageCIOD
Multi-frame Single Bit Secondary Capture ImageCIOD
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Multi-frame True Color Secondary Capture ImageCIOD
X-Ray Angiographic ImageCIOD
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RT ImageCIOD
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RT Structure SetCIOD
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RT Beams Treatment RecordCIOD
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VL Endoscopic ImageCIOD
VL Microscopic ImageCIOD
VL Slide-Coordinates Microscopic ImageCIOD
VL Photographic ImageCIOD
Video Endoscopic ImageCIOD
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VL Whole Slide Microscopy ImageCIOD
Real-Time Video Endoscopic ImageCIOD
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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
12-Lead ECGCIOD
General ECGCIOD
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Key Object Selection DocumentCIOD
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Macular Grid Thickness and Volume ReportCIOD
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Comprehensive 3D SRCIOD
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Acquisition Context SRCIOD
Simplified Adult Echo SRCIOD
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Rendition Selection DocumentCIOD
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Enhanced MR ImageCIOD
MR SpectroscopyCIOD
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Raw DataCIOD
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Ophthalmic Photography 8 Bit ImageCIOD
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Stereometric RelationshipCIOD
Hanging ProtocolCIOD
Encapsulated PDFCIOD
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Enhanced XA ImageCIOD
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RT Ion PlanCIOD
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SegmentationCIOD
Ophthalmic Tomography ImageCIOD
X-Ray 3D Angiographic ImageCIOD
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Enhanced PET ImageCIOD
Surface SegmentationCIOD
Color PaletteCIOD
Enhanced US VolumeCIOD
Lensometry MeasurementsCIOD
Autorefraction MeasurementsCIOD
Keratometry MeasurementsCIOD
Subjective Refraction MeasurementsCIOD
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Ophthalmic Axial MeasurementsCIOD
Intraocular Lens CalculationsCIOD
Generic Implant TemplateCIOD
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Implant Template GroupCIOD
RT Beams Delivery InstructionCIOD
Ophthalmic Visual Field Static Perimetry MeasurementsCIOD
Intravascular Optical Coherence Tomography ImageCIOD
Ophthalmic Thickness MapCIOD
Surface Scan MeshCIOD
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Legacy Converted Enhanced CT ImageCIOD
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Tractography ResultsCIOD
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RT Patient Position Acquisition InstructionCIOD
Microscopy Bulk Simple AnnotationsCIOD
InventoryCIOD
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PatientMModule - Patient
Clinical Trial SubjectUModule - Patient
General StudyMModule - Study
Patient StudyUModule - Study
Clinical Trial StudyUModule - Study
General SeriesMModule - Series
Clinical Trial SeriesUModule - Series
Frame of ReferenceMModule - Frame of Reference
SynchronizationCModule - Frame of Reference
General EquipmentMModule - Equipment
Enhanced General EquipmentMModule - Equipment
General AcquisitionMModule - Acquisition
General ImageMModule - Image
General ReferenceUModule - Image
Image PixelMModule - Image
Multi-frame Functional GroupsMModule - Image
(0008,0023) Content Date1Date
(0008,0033) Content Time1Time
(0020,0013) Instance Number1Integer String
(0020,0242) SOP Instance UID of Concatenation Source1CUnique Identifier
(0020,9161) Concatenation UID1CUnique Identifier
(0020,9162) In-concatenation Number1CUnsigned Short
(0020,9163) In-concatenation Total Number3Unsigned Short
(0020,9228) Concatenation Frame Offset Number1CUnsigned Long
(0022,0028) Stereo Pairs Present3Code String
(0028,0008) Number of Frames1Integer String
(0028,6010) Representative Frame Number3Unsigned Short
(5200,9229) Shared Functional Groups Sequence1Sequence
(5200,9230) Per-Frame Functional Groups Sequence1CSequence
(0008,1140) Referenced Image Sequence2Sequence
(0008,9124) Derivation Image Sequence2Sequence
(0020,9071) Frame Anatomy Sequence1Sequence
(0020,9111) Frame Content Sequence1Sequence
(0018,9074) Frame Acquisition DateTime1CDate Time
(0018,9151) Frame Reference DateTime1CDate Time
(0018,9214) Respiratory Cycle Position3Code String
(0018,9220) Frame Acquisition Duration1CDouble
(0018,9236) Cardiac Cycle Position3Code String
(0020,9056) Stack ID1CShort String
(0020,9057) In-Stack Position Number1CUnsigned Long
(0020,9128) Temporal Position Index1CUnsigned Long
(0020,9156) Frame Acquisition Number3Unsigned Short
(0020,9157) Dimension Index Values1CUnsigned Long
(0020,9158) Frame Comments3Long Text
(0020,9453) Frame Label3Long String
(0028,9110) Pixel Measures Sequence1Sequence
(0040,9096) Real World Value Mapping Sequence1Sequence
(0048,0116) Confocal Microscopy Image Frame Type Sequence1Sequence
(0048,0207) Optical Path Identification Sequence1Sequence
(0048,021A) Plane Position (Slide) Sequence1Sequence
(7FE0,0003) Encapsulated Pixel Data Value Total Length3UV
Multi-frame DimensionMModule - Image
SpecimenCModule - Image
Acquisition ContextMModule - Image
Confocal Microscopy ImageMModule - Image
Cutaneous Confocal Microscopy Image Acquisition ParametersCModule - Image
Optical PathMModule - Image
SOP CommonMModule - Image
Common Instance ReferenceUModule - Image
Frame ExtractionCModule - Image
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 http://www.dicomstandard.org/current/. 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.

In-Stack Position Number Attribute

Tag(0020,9057)
TypeConditionally Required (1C)
KeywordInStackPositionNumber
Value Multiplicity1
Value RepresentationUnsigned Long (UL)
Example Values
  • 5
  • 2
  • 18

The ordinal number of a frame in a group of frames, with the same Stack ID (0020,9056).

Required if Stack ID (0020,9056) or Functional MR Sequence (0018,9621) is present.

See Section C.7.6.16.2.2.4 and Section C.7.6.16.2.2.8 for further explanation.

Note

Part of the Frame Content Functional Group Macro with usage: U

Section C.7.6.16.2.2.4

C.7.6.16.2.2.4 Concatenations and Stacks

Due to implementation specific reasons (such as maximum object size) the information of a multi-frame image may be split into more than one SOP Instance. These SOP Instances form together a Concatenation. This is a group of SOP Instances within a Series that is uniquely identified by Concatenation UID (0020,9161).

The Dimension Index Sequence (0020,9222) for each SOP Instance with the same Concatenation UID (0020,9161) shall contain exactly the same Attributes and values.

In a Concatenation the Dimension Index Sequence (0020,9222) Items of the Shared Functional Groups (5200,9229) shall be identical and have the same values for all individual SOP Instances. The Items of the Per-Frame Functional Groups Sequence (5200,9230) shall be identical for all individual SOP Instances but the values may change per frame. For all other Attributes of all the Modules of the IOD, the same Attributes shall be present and the values shall be identical, with the exception of the following Attributes:

  • Number of Frames (0028,0008)

  • Concatenation Frame Offset Number (0020,9228)

  • In-concatenation Number (0020,9162)

  • SOP Instance UID (0008,0018)

  • Instance Creation Time (0008,0013)

Note

The intent of Concatenations is to split what might have been encoded in a single SOP Instance into smaller fragments for more convenient storage or transmission. All the multiple SOP Instances of a Concatenation should be able to be assembled into a valid single SOP Instance. Hence it is not permitted to change such Attributes as Photometric Interpretation (0028,0004), Rows (0028,0010), Columns (0028,0011), etc.

Stacks describe application-specific groups of frames that have a geometric relationship. Stacks have a Stack ID (0020,9056) that contains a descriptive name that identifies the stack. A Stack ID (0020,9056) may be re-used in another SOP Instance even outside a concatenation. The value of Stack ID (0020,9056) is unique within the scope of a particular Dimension Organization UID (0020,9164) if present, otherwise it is unique within the scope of a particular Concatenation UID (0020,9161). See Figure C.7.6.16-3 for an example.

Figure C.7.6.16-3. Identifying Attributes for Concatenation, SOP Instances, Frames and Stacks


Each frame in a stack has an In-Stack Position Number (0020,9057) that is the ordinal number (starting from 1) of the frame within the set of frames with the same Stack ID (0020,9056), see Figure C.7.6.16-4 for an example.

Figure C.7.6.16-4. Example of multiple stacks


In order to allow interoperable operations on stacks, 2 different frames with the same Stack ID (0020,9056) can only have the same In-Stack Position Number (0020,9057) if they have the same values for the following Attributes:

  1. Dimension Organization UID (0020,9164) to qualify the Stack ID

  2. Image Position (Patient) (0020,0032)

  3. Image Orientation (Patient) (0020,0037)

  4. Rows (0028,0010) * first value of Pixel Spacing (0028,0030) (= field of view in the row direction)

  5. Columns (0028,0011) * second value of Pixel Spacing (0028,0030) (= field of view in the column direction)

  6. Slice Thickness (0018,0050)

Section C.7.6.16.2.2.8

C.7.6.16.2.2.8 Usage of Temporal Position Index, Stack ID and In-Stack Position Number in fMRI Volumes

For fMRI volumes the Temporal Position Index is used to distinguish between the multiple volumes acquired in time (phases of a volume) for the same Stack ID. Each frame in the volume has an In-Stack Position Number that is the ordinal number in space of each volume. See Figure C.7.6.16-4c for an example.

Figure C.7.6.16-4c. Example of Functional MRI volumes