Computer tomography method using a spiral the relative movement and cone beam

摘要

This invention the emission radiation source vis-a-vis object ones regards the computed tomography method of doing nPi relative motion according to spiral. The measurement value which is acquired with respect to spiral, is deduced partly depending upon the angular position of the emission radiation source, intermediate filter value is formed the measurement value which is obtained by filtering doing alongside the filter line making use of the filter. Filter factor is hybridized in each intermediate filter value, but the measurement value which is obtained alongside the filter line which runs only inside the Pi window as for the filter factor for the intermediate filter value which is formed by filtering doing, alongside the filter line which runs also outside that the measurement value which is obtained not to be only inside the Pi window it makes above the filter factor which is hybridized to the intermediate filter value which is formed by filtering doing. It adds the intermediate filter value which is allotted to measurement value to filter value is brought together, filter value being conversely projected, the CT picture is reconstructed.