Abstract: A system for obtaining a tomographic image of an object having a plurality of candidate object image locations is provided. The system includes a processor containing object density information as well as a source of radiation energy for irradiating the object wherein the source of radiation is under the control of the processor. A radiograph of the object is provided and applied to a digitizer for indicating a selected object image location on the radiograph and transmitting the selected location to the processor. The processor then controls the source of radiation to adjust the level of radiation in accordance with the transmitted location and the stored object density information. The processor also controls a translator to adjust the relative object to equipment position in accordance with the transmitted location signal. The source of radiation energy can be moved through pluridimensional patterns.

Abstract: A universal adjustable cover 20 for a lighting fixture 10. Universal cover 20 has openings for mounting on a conduit 50 parallel to the ceiling, and additional openings 22 for angle mounting and 24 for mounting on a vertical conduit. Universal adjustable cover eliminates need for stocking a large number of lighting fixtures for only one mounting configuration.