A process for and intermediates in the preparation of canfosfamide and its salts. The hinge assembly has two major components. The collimator assembly is configured so that gamma rays can pass through the one or more apertures, but the remainder of the collimator assembly is substantially gamma ray absorbent. The process uses a 5\xd75 neighborhood of sensor pixel data centered at the pixel under consideration. A preferred light embodiment includes a clip for removable attachment to the strap, and a light body removably securable to a docking base pivotally secured to the clip.