[Effect of detector sensitivity on regional indices of pulmonary function].

The paper is concerned with a qualitative assessment of the assumption of independence of sensitivity function on the anatomotopographic features of the region in a functional radionuclide study of the lungs. Sensitivity function of standard collimation detectors was calculated for the radionuclides 133Xe and 99mTc. Geometrical sizes of the studied region were determined by respective CT transversal sections. An analysis of the calculation results showed that sensitivity function depended significantly on the anatomotopographic features of the studied region. The error of measurement determined by the variability of sensitivity function, easily changed from 34 to 9%.