Windows Forms Threading

Question

I am new to threading and as such have been inundated with the amount of information that I need to digest in order to use threads to keep a Form responsive. We make equipment that creates medical images. I need to start a test routine in another thread that would run and pass back status messages (string) to the Main Forms to be shown in a status text box. Should I use Thread, Asynchronous Delegates, Background Worker??? Anyone have any ideas? THX greg