DICOM PS3.3 2016c - Information Object Definitions

C.11.23 Volumetric Presentation State Relationship Module
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### C.11.23 Volumetric Presentation State Relationship Module

Table C.11.23-1 contains Attributes that describe sets of inputs to a Presentation State and how each input is to be displayed in the presentation.

Table C.11.23-1. Volumetric Presentation State Relationship Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Volumetric Presentation State Input Sequence | (0070,1201) | 1 | Inputs to the Presentation State. Each item represents one input. One or more items shall be included in this sequence.
>Volumetric Presentation Input Number | (0070,1207) | 1 | Identification number of the input. Values shall be ordinal numbers starting from 1 and monotonically increasing by 1 within the Volumetric Presentation State instance.
>Presentation Input Type | (0070,1202) | 1 | Type of input. See Section C.11.23.1. Enumerated Values: VOLUME
>Input Sequence Position Index | (0070,1203) | 1C | Position of this input data within a set of sequential inputs. Multiple inputs may share the same value. ### Note For example, CT and PET inputs. Distinct values shall be ordinal numbers starting from 1 and monotonically increasing by 1 within the Volumetric Presentation State instance. See Section C.11.23.2. Required if Presentation Animation Style (0070,1A01) is present with a value of INPUT_SEQ. ### Note The inputs of the sequence are typically temporally related.
>Referenced Image Sequence | (0008,1140) | 1C | The set of images comprising this input volume. One or more items shall be included in this sequence. See Section C.11.23.1 for constraints on objects referenced by this sequence. Required if Presentation Input Type (0070,1202) has a value of VOLUME.
>>Include Table 10-3 “Image SOP Instance Reference Macro Attributes” |
>Referenced Spatial Registration Sequence | (0070,0404) | 1C | A reference to a Spatial Registration Instance that is used to register the referenced inputs. Only one item shall be included in this sequence.All images referenced by the Referenced Image Sequence (0008,1140) of this item of the Volumetric Presentation State Input Sequence (0070,1201) shall be referenced by the Spatial Registration instance. See Section C.11.23.3. Required if the Frame of Reference UID (0020,0052) value of the Images referenced by the Referenced Image Sequence (0008,1140) of this item of the Volumetric Presentation State Input Sequence (0070,1201) does not match the Frame of Reference UID (0020,0052) value of this Presentation State instance. May be present otherwise.
>>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
>Include Table C.11-2b “VOI LUT Macro Attributes” |
>Crop | (0070,1204) | 1 | Specifies whether to crop this input. Enumerated Values: YES NO
>Cropping Specification Index | (0070,1205) | 1C | Values of Cropping Specification Number (0070,1309) of the item in the Volume Cropping Sequence (0070,1301) specifying the cropping methods to be applied to this input. Required if Crop (0070,1204) has a value of YES.
>Compositing Method | (0070,1206) | 1C | The rendering method for this input. Enumerated Values: AVERAGE_IP A method that projects the mean intensity of all interpolated samples that fall in the path of each ray traced from the viewpoint to the plane of projection. MAXIMUM_IP A method that projects the interpolated sample with maximum intensity that fall in the path of each ray traced from the viewpoint to the plane of projection. MINIMUM_IP A method that projects the interpolated sample with minimum intensity that fall in the path of each ray traced from the viewpoint to the plane of projection. Required if MPR Thickness Type (0070,1502) has a value of SLAB.

#### C.11.23.1 Presentation Input Type Volume Input Requirements

SOP instances with Presentation Input Type (0070,1202) value of VOLUME referenced by one item in Volumetric Presentation State Input Sequence (0070,1201) are a collection of image instances or frames within image instances that conforms to the following requirements:

- All image instances shall have the same values of

  - SOP Class UID(0008,0016)

  - Series Instance UID (0020,000E)

  - Frame of Reference UID (0020,0052) or Volume Frame of Reference UID (0020,9312)

- All instances or frames shall have the following attributes of the same value:

  - Samples per Pixel (0028,0002)

  - Photometric Interpretation (0028,0004)

  - Rows (0028,0010)

  - Columns (0028,0011)

  - Bits Allocated (0028,0100)

  - Bits Stored (0028,0101)

  - High Bit (0028,0102)

  - Pixel Representation (0028,0103)

  - Pixel Spacing (0028,0030)

- Photometric Interpretation (0028,0004) shall be MONOCHROME2

- All Instances or Frames s have orthogonal row and column vectors

- A VOLUME input shall have more than one frame.

- No two Instances or Frames share the same Image Position (Patient) (0020,0032) or Image Position (Volume) (0020,9301). Two Instances or Frames should be treated as sharing the same position if the differences between their positions is sufficiently small.

- All Instances or Frames shall be parallel. Instances or Frames may be treated as parallel if the differences in their Image Orientation (Patient) (0020,0037) or Image Orientation (Volume) (0020,9302) are sufficiently small.

- All Instances or Frames shall be sufficiently aligned such that a single ray can pass through the upper-left hand corner of all Instances or Frames. That ray shall be orthogonal to the plane of the frame (i.e., normal to the input frames). Instances or Frames may be treated as aligned if the degree of misalignment between frames or relative to the normal is sufficiently small.

- A VOLUME input may have:

  - Variable spacing between slices

  - Overlapping slice thicknesses

  - Gaps between slice thicknesses

### Note

The degree of tolerance for discrepancies in position and orientation may vary between applications.

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C.11.22.2 Presentation Sequence Collection UID | Home | C.11.23.2 Input Sequence Position Index

DICOM PS3.3 2016c - Information Object Definitions