Creation of Template VOIs

An image series for which a set of contour VOIs has been defined can easily be converted into a template as follows:

1. Load the image series in the PVIEW tool.
2. Outline a set of contour VOIs in the VOIs page.
3. On the Group tab, select the VOIs to be included in the template.
   Important: do NOT include VOIs (such as a whole-brain VOI) which cover other VOIs.
4. Activate the Create Template Atlas icon available on the right side of the VOI Group. The same ucon is available in the lateral task bar.

A dialog window appears which requests a name for template. Using this name a subdirectory is created in resources/templates/voitemplates, where the image series is saved in NifTI format, and a text file with the VOI names is created. After activating the refresh button in the Atlas panel of Template, the new template appears and can be used for statistics.

Optionally, normalization files can be "appended" to the template. To this purpose enable the Normalization files (optional) checkbox. Using the above configuration, the CPFPX subdirectory is created in resources/templates/voitemplates. The image series is saved in NifTI format, and a text file with the VOI names is create. Additionally, a normalization folder is available which contains the template image in NifTI format (norm_template.nii) and a mask folder where the mask image is saved in NifTI format (mask.nii).

Spatial VOI Transformation

If the user has a set a VOIs defined on a different data set and a spatial transformation which maps the other data set to the current, this transformation can be applied to the VOIs in two ways:

1. By applying the transformation during the loading operation,
2. or by using the Transform selected VOIs button in the VOI Tools panel.
   

Note that the Transform selected VOIs button also works on template VOIs.