Measure Radial Distance

[madtrick]

I'm new to JAVA and ImageJ and was wondering if anyone knows of any existing plugins/macros that can measure the radial profile of a wobbly circle? This is in order to be able to see how far the radius of this wobbly circle deviates.

Here an example image that I want to insert into ImageJ. The centre of the inner circle is the point where I need to take the origin.



Below is a quick mock up that I am wanting to achieve with ImageJ. Each line begins at the centre of the inner circle and stops when it touches the outer wobbly circle, the distances of those lines are then put into a table.



Any ideas? Many thanks