C.11.13 Presentation State Mask Module
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### C.11.13 Presentation State Mask Module

Table C.11.13-1 contains Attributes that specialize the use of masks in a Presentation State.

Table C.11.13-1. Presentation State Mask Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Mask Subtraction Sequence | (0028,6100) | 1C | Required if Mask Module is present. Only a single Item shall be included in this sequence. Applicable Frame Range (0028,6102) shall not be included in the Sequence Item. See Section C.7.6.10 for a complete definition of the Attributes in the Items of this Sequence other than Mask Operation (0028,6101) and Applicable Frame Range (0028,6102). ### Note This Sequence is replicated here in order to specify one Item, additional conditions on Mask Operation (0028,6101) and to forbid Applicable Frame Range (0028,6102). The role of Applicable Frame Range (0028,6102) is replaced by Referenced Frame Number (0008,1160).
>Mask Operation | (0028,6101) | 1 | Type of mask operation to be performed Enumerated Values: AVG_SUB TID See Section C.7.6.10.1 for further explanation. ### Note The requirement in this module is for Enumerated Values, which overrides the requirements of the Mask Module.
>Contrast Frame Averaging | (0028,6112) | 1C | Specified the number of contrast frames to average together before performing the mask operation. Required if Mask Frame Numbers (0028,6110) specifies more than one frame (i.e., is multi-valued). ### Note The requirement in this module is conditional and overrides the optional requirements of the Mask Module.
Recommended Viewing Mode | (0028,1090) | 1C | Specifies the recommended viewing protocol(s). Enumerated Values: SUB for subtraction with mask images Required if Mask Subtraction Sequence (0028,6100) is present. ### Note The requirements in this module are type 1C and a specified Enumerated Value, which override the requirements of the Mask Module.

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