ROI (Circle)
Draw a circle
With "Add circle" 
selected, click two points on image and specify circle.
The specified circle becomes ROI and is used for target range of various data analysis and display range of pseudo color.
The following mouse operations are possible.
| Operation | Description | |
|---|---|---|
| Click on image with selected | Specify start point and end point of circle. | |
Mouse drag vertex with  selected | Move vertex to change diameter of circle. | |
Mouse drag rectangle with  selected | Move circle. | |
| Right-click on circle | Plot time signal | Displays the average waveform of the pixels within the specified circle. If you turn on "Cx" under "Signals" in the tree on the left side of the window, the waveform will be displayed.  |
| Export... | You can export circle position information to a "rdb" file. A rdb file can be imported by [ROI]-[Import regions...] on the right-click menu. | |
| Copy | Copy circle's location information. You can paste location information at same position by clicking [ROI]-[Paste regions] to another data in the same dataset. | |
| Rename | Delete circle. | |
| Delete | Delete circle. | |