<prompt> The element used as target material in mammography is which of the following?CopperTungstenMolybdenumAluminum  <response>: Two target materials used for mammography are molybdenum Z 42 and rhodium Z 45, the former being the most common. Molybdenum has a K-edge at 20 keV and produces characteristic radiations at 17.4 and 19.6 keV. In order to achieve a more nearly monoenergetic beam, the emerging spectrum is filtered by the same material Molybdenum, about 0.03 mm thick. 