Title :
Distinguishability in impedance imaging
Author :
Cheney, Margaret ; Isaacson, David
Author_Institution :
Dept. of Math. Sci., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
Impedance imaging systems apply currents to the surface of a body, measure the induced voltages on the surface, and from this information reconstruct an approximation to the electrical conductivity in the interior. A detailed discussion of several ways to measure the ability of such a system to distinguish between two different conductivity distributions is given. The subtle differences between these related measures are discussed, and examples are provided to show that these different measures can give rise to different answers to various practical questions about system design.
Keywords :
electric impedance imaging; body surface current application; conductivity distributions; electrical conductivity; impedance imaging distinguishability; induced voltages; medical diagnostic imaging; system design; Conductivity measurement; Current measurement; Electric variables measurement; Electrodes; Image reconstruction; Impedance measurement; Surface impedance; Surface reconstruction; Voltage; Voltmeters; Computer Simulation; Electric Conductivity; Electrodes; Evaluation Studies as Topic; Plethysmography, Impedance; Sensitivity and Specificity;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
