Frame Type Attribute
| Tag | (0008,9007) |
|---|---|
| Type | Required (1) |
| Keyword | FrameType |
| Value Multiplicity | 4-5 |
| Value Representation | Code String (CS) |
Type of Frame. A multi-valued Attribute analogous to Image Type (0008,0008).
Enumerated Values and Defined Terms are the same as those for the four values of Image Type (0008,0008). See Section C.8.12.4.1.
Note
Part of the Whole Slide Microscopy Image Frame Type Functional Group Macro with usage: M
Section C.8.12.4.1
C.8.12.4.1 Whole Slide Microscopy Image Module Attribute Descriptions
C.8.12.4.1.1 Image Type
Image Type (0008,0008) is specified to be Type 1 with the following constraints:
Value 1 shall have a value of ORIGINAL or DERIVED
Value 2 shall have a value of PRIMARY
Value 3 (Image Flavor) shall have the Defined Terms in Table C.8.12.4-2.
Table C.8.12.4-2. Whole Slide Microscopy Image Flavors
|
VOLUME |
Set of frames that define a regularly sampled volume; shall not include the label; may be used for each layer of a Multi-Resolution Pyramid. |
|
LABEL |
Purpose of image is to capture the slide label only; non-label area shall not be present; the label is shown in Figure C.8-16. |
|
OVERVIEW |
Purpose of image is to provide an overview of the entire glass slide; shall include at least part of the label, all of the specimen and the empty space that are shown in Figure C.8-16. NoteOne purpose of the OVERVIEW image is to allow visual quality control to assure that tissue fragments have not been omitted when selecting areas (manually or automatically) to digitize at high resolution. The OVERVIEW image is distinct from the lowest resolution VOLUME image(s) of Whole Slide Microscopy Image pyramids, and the THUMBNAIL image, neither of which includes the label. |
|
THUMBNAIL |
Purpose of image is to provide an overview of the specimen; shall not include the label; may be the apex (lowest resolution) layer of a Multi-Resolution Pyramid. |
Note
A Value 3 of LOCALIZER was previously defined, which triggered the mandatory inclusion of the retired Multi-Resolution Navigation Module (Retired). See PS3.3-2021c.
Value 4 (Derived Pixel) shall have the Defined Terms specified in Table C.8.12.4-3.
Table C.8.12.4-3. Whole Slide Microscopy Image Derived Pixels
|
NONE |
No derivation of pixels (original). |
|
RESAMPLED |
Pixels were derived by down sampling a higher resolution image. |
No additional values shall be present.
C.8.12.4.1.2 Imaged Volume Width, Height, Depth
The full physical extent of the whole slide image target volume is described in the Attributes Imaged Volume Width (0048,0001), Imaged Volume Height (0048,0002), and Imaged Volume Depth (0048,0003). These values reflect the maximum extent in these dimensions. There is no requirement that this entire extent is actually encoded in frames of the Image SOP Instance, unless Dimension Organization Type (0020,9311) is present with a value of TILED_FULL.
The value of Imaged Volume Depth (0048,0003) shall not be 0. If only a single focal plane is imaged, the Imaged Volume Depth may be the optical depth of field as encoded in Slice Thickness (0018,0050) of the Pixel Measures Functional Group (see Section C.7.6.16.2.1).
C.8.12.4.1.3 Total Pixel Matrix Columns, Rows, Focal Planes
C.8.12.4.1.4 Total Pixel Matrix Origin Sequence and Image Orientation (Slide)
C.8.12.4.1.5 Photometric Interpretation and Samples Per Pixel
See Section C.7.6.3.1.2.
Enumerated Values for Photometric Interpretation (0028,0004):
- MONOCHROME2
-
- RGB
-
- YBR_FULL_422
-
- YBR_ICT
-
- YBR_RCT
-
The value shall be appropriate to the compression Transfer Syntax used, if any, and shall be MONOCHROME2 or RGB for uncompressed or lossless compressed Transfer Syntaxes that do not have defined color space transformations, YBR_ICT or RGB for irreversible JPEG 2000 Transfer Syntaxes, YBR_RCT or RGB for reversible JPEG 2000 Transfer Syntaxes, and YBR_FULL_422 or RGB for JPEG lossy compressed Transfer Syntaxes.
Note
-
Future lossless and lossy Transfer Syntaxes may lead to the need for new definitions and choices for Photometric Interpretation. The Enumerated Values may therefore be extended with additional Photometric Interpretation values directly associated with new Transfer Syntaxes that are negotiated, and hence do not render existing implementations non-conformant.
-
Motion compression Transfer Syntaxes are not expected to be used for Whole Slide Imaging, so the use of YBR_PARTIAL_420 for MPEG2, MPEG-4 AVC/H.264 and HEVC/H.265 Transfer Syntaxes is not permitted.
-
The use of RGB with JPEG and JPEG 2000 is only intended to allow for conversion to DICOM of images from proprietary formats for which no color transformation from RGB to YBR was performed and the encoded components really are RGB. The value of Photometric Interpretation (0028,0004) describes what is actually encoded, so a value of RGB is not used when the compressed components are actually YBR.
Multi-spectral images may be encoded as a single wavelength band (color) in each frame using MONOCHROME2, or with up to three bands in each frame using one of the color Photometric Interpretations.
Enumerated Values for Samples per Pixel (0028,0002) when Photometric Interpretation (0028,0004) is MONOCHROME2:
- 1
-
Enumerated Values for Samples per Pixel (0028,0002) when Photometric Interpretation (0028,0004) is not MONOCHROME2:
- 3
-