Signal-to-Noise Ratio Analysis of a Phase-Sensitive Voltmeter for Electrical Impedance Tomography

Applications of Electrical Impedance Tomography in Neurology

Introduction: Electrical impedance tomography (EIT) is a non-invasive technique utilized in various medical applications, including brain imaging and other neurological diseases. Recognizing the physiological and anatomical characteristics of organs based on their electrical properties is one of the main applications of EIT, as each variety of tissue structure has its own electrical characteris...

Optical signal to noise ratio improvement through unbalanced noise beating in phase-sensitive parametric amplifiers.

We investigate the beating of signal and idler waves, which have imbalanced signal to noise ratios, in a phase-sensitive parametric amplifier. Imbalanced signal to noise ratios are achieved in two ways; first by imbalanced noise loading; second by varying idler to signal input power ratio. In the case of imbalanced noise loading the phase-sensitive amplifier improved the signal to noise ratio f...

Addendum to ‘Electrical impedance tomography’

We present some additional references and clarifying statements to the topical review ‘Electrical impedance tomography’ (Borcea L 2002 Inverse Problems 18 R99–136). In this addendum to ‘Electrical impedance tomography’, the author would like to make some clarifying statements regarding section 7.1.2 and to direct the reader to additional references relating to sections 4.3 and 6.1. • The idea o...

From Electrical Impedance Tomography to Network Tomography

Design of Voltage Measuring Circuits in Electrical Impedance Tomography Based on Dual Frequency Phase-Sensitive Demodulator

In this paper, a dual frequency phase sensitive demodulation (PSD) technique is suggested to measure electrode voltages in electrical impedance tomography. The simulation results obtained by the dual frequency PSD are compared with the single frequency PSD in terms of accuracy on a simple phantom.