PP.2.2 Hierarchy of Use Cases
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### PP.2.2 Hierarchy of Use Cases

This section organizes the list of use cases into a hierarchy. Section PP.3 maps items in this hierarchy to specific solutions in the DICOM Standard.

1. Data

   1. 3D Volume Data

      1. Static and Dynamic volume data sets (Cases 1 and 2)

      2. Suitable for applications that create MPR and Render views (Cases 3 and 4)

      3. 3D size measurements (Case 5)

   2. 2D representations of 3D volume data (Cases 6, 7, and 8)

      1. Static and Dynamic varieties (Case 9)

      2. 2D size measurements (Case 10)

   3. Separation of data types (Case 11)

   4. Integrate physiological waveforms with image acquisition (Case 12)

2. Workflow

   1. Permit Two-step review (Case 13)

      1. Review 2D representations first (potentially on legacy viewer)

      2. On-demand operations on 3D volume data set

   2. Frame of Reference

      1. Frame-relative

      2. Probe-relative

      3. Patient-relative (Cases 14 and 15)

      4. Anatomical (Fiducials) (Case 16)

   3. Identify Key images (Case 17)

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