Hard blasting technique
This technique offers the possibility of displaying different types of tissue on a single image because the attenuation coefficients for the tissue are energy-dependent (i.e. tube voltage dependent) and also depend on the density of the tissue and the atomic number of the elements occurring in the tissue. At higher voltages, the atomic number factor only has a single proportional weight (below 50 keV with the fourth power), so that at higher x-ray energies the attenuation coefficients of the various tissues are closer to one another. The X-ray radiation is thus weakened / transmitted more strongly on average, which reduces the radiation exposure through absorption in the tissue. However, this also reduces the contrast of the X-ray exposure.
Hardblasting technology is used, for example, to take pictures of the chest .
- Guidelines of the German Medical Association on quality assurance in X-ray diagnostics. ( Memento from March 1, 2008 in the Internet Archive )