z-Score in VOI

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z-Score in VOI

This tool performs calculation of z-score values based on the average and the standard deviation of the values within a specifed VOI. When more than one VOI is available on the VOIs list the algorithm will consider as VOI the VOIs union selected on the Group tab.

The operation works frame-wise for dynamic data.

ExternalTool-Z_ScoresInVOIs

Masking outside the VOI is optional. It can be easily achieved enabling the Mask outside by value box. The masking value can be specified in the dedicated text field.

The Ok button starts the calculation. A new image series is created if the Replace box is unchecked, otherwise the original series is overwritten.

This preprocessing is recommended for transforming the data as input to the supervised clustering algorithm implemented in the PGEM module.