The GSI Viewer accepts images from a CT System
that can acquire CT images using different kV levels of the same anatomical region
of a patient in a single rotation from a
single source. The differences in the energy
dependence of the attenuation coefficient of the different materials provide
information about the chemical composition of body materials. This approach
enables images to be generated at energies selected from the available spectrum
to visualize and analyze information about anatomical and pathological
structures.
GSI provides information of the chemical
composition of renal calculi by calculation and graphical display of the
spectrum of effective atomic number. GSI Kidney stone
characterization provides additional
information to aid in the characterization of uric acid versus non-uric acid
stones. it is intended to be used on non-contrast studies as an adjunct to current
standard methods for evaluating stone etiology and composition.
