10.11 Contributing Image Sources Macro
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## 10.11 Contributing Image Sources Macro

Table 10-14 contains IOD Attributes that describe the image related characteristics of the contributing image sources used to create a new SOP Instance (e.g., a volume SOP Instance).

Table 10-14. Contributing Image Sources Macro Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Rows | (0028,0010) | 1 | Number of rows in the images.
Columns | (0028,0011) | 1 | Number of columns in the images.
Bits Stored | (0028,0101) | 1 | Number of bits stored for each pixel sample. Each sample shall have the same number of bits stored. See PS3.5 for further explanation.
Lossy Image Compression | (0028,2110) | 1C | Specifies whether the Source Images have undergone lossy compression (at a point in their lifetime). Enumerated Values: 00 Image has NOT been subjected to lossy compression. 01 Image has been subjected to lossy compression. See Section C.7.6.1.1.5. Required if it is known whether or not Lossy Compression has been performed on the Images. ### Note In some SOP Class definitions the Lossy Image Compression attribute is optional.
Lossy Image Compression Ratio | (0028,2112) | 1C | Describes the approximate lossy compression ratio(s) that have been applied to this image. See Section C.7.6.1.1.5 for further explanation. May be multi-valued if successive lossy compression steps have been applied; the value order shall correspond to the values of Lossy Image Compression Method (0028,2114). ### Note For example, a compression ratio of 30:1 would be described in this Attribute with a single value of 30. For historical reasons, the lossy compression ratio may also be described in Derivation Description (0008,2111). Required if Lossy Image Compression (0028,2110) is "01".
Lossy Image Compression Method | (0028,2114) | 1C | A label for the lossy compression method(s) that have been applied to the source images. See Section C.7.6.1.1.5 for further explanation. May be multi-valued if successive lossy compression steps have been applied; the value order shall correspond to the values of Lossy Image Compression Ratio (0028,2112). ### Note For historical reasons, the lossy compression method may also be described in Derivation Description (0008,2111). Required if Lossy Image Compression (0028,2110) is "01".

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