Impedance-Cystovolumetry from Multifrequency Electrical Impedance Tomography

The objective of impedance-cystovolumetry is the continuous, non-invasive monitoring of bladder volume. By using electrical impedance tomography, a correlation between the change of impedance in the image and bladder volume can be found. However, the typically used timedifferential approach has the problem of both requiring a calibration measurement with an empty bladder and being dependent on the urine conductivity. This paper presents an improvement to the time-differential approach using multifrequency electrical impedance tomography.