In the clinical routine radiologists often create a set of derived images from Planar MPR views that cover a specific anatomic region. For example from a head scan a range of oblique transverse Planar MPR views are defined. These views are rendered into separate derived CT or Secondary Capture SOP Class instances for conveying the relevant information to the referring clinician.
Figure XXX.3.3-1. Definition of a range of oblique transverse Planar MPR views on sagittal view of head scan for creation of derived images
However, these derived images depicting the specific anatomy cannot be changed by the display application. The referring clinician cannot view other anatomy not shown by the derived images and cannot alter the orientation of the Planar MPR views.
Alternatively, a set of Planar MPR VPS SOP Instances can be created to depict the slices through the volume. To indicate that these Volumetric Presentation State instances are sequentially related, the Presentation Sequence Collection UID (0070,1102) is used to associate the instances to show the instances are to be displayed in sequence, and each VPS instance is given a Presentation Sequence Position Index (0070,1103) value to indicate the order in which the instances occur in the collection (in this case, a spatial sequence). In this usage, no animation is specified and it is at the discretion of the display application how these views are to be presented, such as by frames in a light-box format or by a manual control stepping through the presentations in one display window.