5mm
| Genre: | METKMisc |
|---|---|
| Authors: | Christian Tietjen |
| Short description: | Display the vertical extent of segmentation results. |
The basic problem of slice based visualization, namely the lack of an overview in cross-sectional images, has been tackled with a 2.5D approach to provide the essential information, the LiftChart http://wwwisg.cs.uni-magdeburg.de/cv/pub/files/EuroVis_Tietjen_2006_SBV.pdfLiftChart. A narrow frame attached next to the cross sectional image represents the overall extent of slices in the volume data set. The top and bottom boundary of the frame correspond to the top and bottom slice of the dataset. Each segmented structure is displayed as a bar at the equivalent vertical position inside this frame. Upper bars correspond to higher structures in the body.
The currently displayed slice of the volume dataset is depicted by a horizontal line in the LIFTCHART widget. The slice number is displayed next to this representation. To visualize not only the -distribution of structures in the volume, but also information about their horizontal position, we developed several arrangements of the bars in the LIFTCHART.
divideBySide and hideSideUnknown: Since some anatomic structures have a defined side, e.g. the left or right, the LIFTCHART may be divided in three parts: one part for structures on the left and on the right side each and one part for structures in the middle.
Aggregation: None The most simple form shows each anatomic structure represented by one bar.
Aggregation: Structure, StructureGroup and All: It is also possible to group bars which belong to the same class of anatomical structures to minimize the horizontal extent of the widget. The lymph nodes are aggregated into one column. The choice whether structures should overlap each other in the LIFTCHART or not depends on the clinical question. To make it possible to emphasize single structure within one aggregated column, the more important structures are drawn at last. Thus, if they are colored differently, they are visible again.
| ObjMgr-Key | Value | Action |
|---|---|---|
ObjID  Appearance * |
* | Listen for relevant events |
| ObjID Description * |
* | Listen for relevant events |
| active: | Toggle LIFTCHART display |
| verticalOffset: | Offset to the top and bottom border |
| aggregation: | See above. |
| minImportance: | Slider to blend off unimportant structures. If the Importance tag is not set, the 1 - Transparency is used. |
| maxExtent: | Slider to blend off too big structures. Many structures range over the whole extent of the dataset. Thus, the provided information is useless. |
| divideBySide: | See above. |
| hideSideUnknown: | See above. |