1. A method for identifying a region of interest for a digital x-ray system, said method comprising the steps of: obtaining a low-dose preshot image; overlaying said preshot image with a predefined configuration having at least one division; selecting at least one division from said predefined configuration to identify a region of interest for at least one subsequent diagnostic image; determining exposure characteristics for said subsequent diagnostic image based on said identified region of interest; obtaining at least one diagnostic image using said determined exposure characteristics.