In the representation of X-ray images, an atomic number characteristic for an X-rayed sub-object is determined from X-ray beams having different energies and the absorption values determined in that process, to which specific colors and shades are assigned. A rotation shaft of the first intermediate gear is movable between a first position and a second position along an elongated hole formed on a supporting member. Files data that do not have content stored locally have metadata associated with the files stored locally in the combined file space. The device includes a computerized injector head capable of switching between two injectates without physical human intervention. The corresponding device comprises a component for storing Nth-order linear prediction coefficients, a component for performing linear prediction analysis, a component for computing weighted linear prediction energy and a component for determining whether the current frame contains speech or noise based on calculated weighted linear prediction energy.