The bounding box of contour or object VOIs can be used for cropping image series to a sub-volume of interest. The example below illustrates the following situation:
1.A sphere VOI was placed on the brain part of a whole-body PET.
2.After activating the VOI action button the sphere was scaled to and ellipsoid enclosing the brain with some margin.
3.The Crop button was activated.
When accepting the Confirmation dialog the resulting image series just includes the data volume defined by the bounding box of the ellipsoid.
Note that if the Group panel is selected, the cropping volume is defined by the bounding box enclosing all selected VOIs.
The cropping of images allows reducing the RAM requirements, and may focus data processing on the relevant parts of the image.