Thank you for your answer.
I am using the version of the slicer that was released on Feb. 26 for windows.
When I specified the segments as you taught me before (Fig1), all segments took the same value.
Fig2 shows the table.
Fig1
Fig2
When I click on “Create ROI around segments” to specify the segments, the ROI is created, but it is a rectangle. (Fig3)
Fig3
If there is anything wrong with my procedure, please let me know.