X-ray radiator to generate quasi-monochromatic x-ray radiation, and radiography x-ray acquisition system employing same

A medical radiography x-ray acquisition system comprising:

• an x-ray radiation device comprising a punctiform radiation source that emits polychromatic x-ray radiation, a diffraction device on which said polychromatic x-ray radiation is incident, said diffraction device diffracting the polychromatic x-ray radiation incident thereon and having a super-mirror comprised of crystalline material having a flat surface, said crystalline material in said super-mirror having a crystal lattice exhibiting a lattice plane spacing that continuously varies within said crystal lattice, and said diffraction device causing quasi-monochromatic x-ray radiation to be generated from a portion of the polychromatic x-ray radiation incident thereon by Bragg reflection at said super-mirror;
• and
• an x-ray detector located in a path of said quasi-monochromatic x-ray radiation, said x-ray radiation device and said x-ray detector being adapted to receive an examination subject therebetween that is also irradiated by said quasi-monochromatic x-ray radiation, and said x-ray detector generating electrical signals representing said quasi-monochromatic x-ray radiation attenuated by the examination subject, in a form allowing generation of an x-ray image of the examination subject therefrom.