Patent ID: 7476023

Claim:
A multiple energy x-ray source assembly comprising: a support structure having an aperture formed therein; a first x-ray generating source comprising a first cathode and a first anode positioned within a first evacuated enclosure, the first x-ray generating source mounted on the support structure and configured to emit a first primary x-ray signal through the aperture along a first predetermined path and having a first predetermined energy level; a second x-ray generating source comprising a second cathode and a second anode positioned within a second evacuated enclosure, the second x-ray generating source mounted on the support structure and configured to emit a second primary x-ray signal through the aperture along a second predetermined path and having a second predetermined energy level; and first and second interlocking beam shields configured to position the first x-ray generating source with respect to the second x-ray generating source on the support structure such that the position of the first source and the second source are adjustable with respect to one another.