Basically there are two ways:
Loop the table, check the cell that contains the radiobutton to see if it is checked or not.
Add an event handler to the radiobutton on creation (the same handler for each radiobutton).
raid.Clicked += ...
When clicked, the sender object can be casted to a RadioButton object ("unboxed") and the value updated in a list of some kind. (eg. Dictionary<string,> where string is the button name)