How to draw ring or donut shaped roi?



What is the simple way to draw ring or donut shaped roi?

I want to measure things only in that donut region.

It doesn’t necessarily have to be a perfect oval donut, I also want make pologonal donuts, because ROI shapes are not round.

Thank you.


Hi @Jiseok,

after drawing a circle, you can click the menu Edit > Selection > Make band... to get a donut shaped ROI. If you would like to program that with ImageJ macro, it would look like this:

makeOval(71, 69, 111, 115);
run("Make Band...", "band=15");


Creating Two ROI to Drag Around Screen