| CPC A61B 6/481 (2013.01) [A61B 6/482 (2013.01); A61B 6/502 (2013.01); G21K 1/10 (2013.01); H01J 35/10 (2013.01); H01J 2235/081 (2013.01)] | 11 Claims |

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1. An apparatus for X-ray mammography, comprising an X-ray tube, wherein:
the X-ray tube comprises an anode and a focal spot track;
the focal spot track comprises a tellurium foil and a cerium foil; and
the tellurium foil and the cerium foil are attached to the anode.
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