the present invention is a detection system and method for using the detection system in radiant energy imaging systems . in particular , the present invention is an improved detection system employing multiple screens for greater detection efficiency . and more particularly , the present invention is a detection system for detecting electromagnetic radiation having an enclosure having four adjacent walls , connected to each other at an angle and forming a rectangle and interior portion of the enclosure , a front side area and a back side area formed from the four adjacent walls and located at each end of the enclosure , at least two screens , that further include an active area for receiving and converting electromagnetic radiation into light , and a photodetector , positioned in the interior portion of the enclosure , having an active area responsive to the light .