Functionality is available in the Pro edition
To create a series fusion:
Open the study.
Select the series.
Click the Series fusion button on the toolbar or select the View menu and the Series fusion item. The selected series can be found on the Slice list panel.
Select another series on the Available series panel.
Click the Add series as a new fusion layer button. If the series fusion is already open in the Multiplanar reconstruction or Volume reconstruction window, then the series will be also added in these windows.
To delete a slice click the Remove fusion layer button or select the Fusion menu and the Remove layer item. If the series fusion is already open in the Multiplanar reconstruction or Volume reconstruction window, then the series will also be removed in these windows.
The series fusion will appear on the current study series panel and may as well be opened from there.
This tool is also available from the image context menu.