MONOCHROMATIC ENERGY-SUBTRACTION RADIOGRAPHY USING A ROTATING ANODE SOURCE AND A BENT LAUE MONOCHROMATOR

A system for area-beam energy-subtraction monochromatic radiography wa s developed and tested. It utilizes a bent Laue crystal monochromator developed at the National Synchrotron Light Source (NSLS), and a compa ct rotating anode x-ray source developed at the Science Research Labor atory (SRL). The K-alpha, characteristic lines (both K-alpha 1 and K-a lpha 2) of the cerium and barium targets were diffracted by the monoch romator and used for the above-and below-K-edge imaging, respectively, of phantoms with iodine contrast agents. Digital subtraction of the i mages produced an iodine image.