An image sensor may include a dielectric, a metal interconnection, an align key, a first substrate, a photodiode, and a transparent electrode. In particular, a method is provided for displaying a plurality of radiological density images in a single viewing window by overlaying gray scale images of each radiological density image in a single display window. An under-run curve may be applied to the torque-to-speed curve and that corresponds to a target speed. The rescue tool may further include a first end tool operably connected to a first end of the extension tube assembly and an end plate assembly rotatably mounted to the manifold block.