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Over time, the database may collect a large amount of data. The Aggregate Components tool allows summarizing and extracting data of a specific component type such as VOI statistics, kinetic modeling parameter files etc.
The example below shows how results of Alzheimer Discrimination analyses can be exported. After selecting the component type ALZHEIMER DISCRIMINATION RESULTS all corresponding results are listed.
The list can further be filtered using demographic or project attributes. Then select the results to be exported (CTRL+A for Select all), right click on the list, and activate the appearing Export button. The files are then saved into a directory which can be specified. Similarly, other types of derived component data can be exported.
More sophisticated operations than a mere file export are available for VOI statistics (.voistat) and Kinetic Modeling (.kinpar) results. If either of these types is selected, the Create and Tables tabs become active. Their purpose is to compile the results contained in multiple files into a comprehensive table, which can be exported for further analyses. Note that this type of analysis is most effective if consistent naming conventions (same region names) are obeyed.