C.8.24.5 Excluded Intervals Module

The Excluded Intervals Module indicates those periods within the Acquisition Duration (0018,9073) during which no volume acquisition takes place. It provides information not available at the frame level or image level, since individual frames of the volume may have been built-up over a time period within which some intervals were excluded from acquisition. Further, it provides information that is not specific to associated waveform objects since the fact that volume acquisition was excluded during these intervals is a characteristic of the volume, not the associated waveform(s). Table C.8.24.5-1 specifies the attributes of the Excluded Intervals Module.

Note: For example, if the imaging device performing a gated volume acquisition excludes volume data acquired during an ectopic beat, the Excluded Intervals attributes would be used to mark this interval in an associated physio waveform display.

Table C.8.24.5-1EXCLUDED INTERVALS MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Excluded Intervals Sequence (0018,9803) 1C List of excluded intervals. One or more items shall be included in this sequence. Required if one or more intervals was excluded.
>Exclusion Start Datetime (0018,9804) 1 Time-point of the exclusion start in the same Synchronization Frame of Reference as Acquisition Datetime (0008,002A).
>Exclusion Duration (0018,9805) 1 Duration of the exclusion in ms.

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Figure C.7.6.16-2: Relationship of Timing Related Attributes