Sensitivity analysis of thorax imaging using two-dimensional Electrical Impedance Tomography (EIT)

Abstract

Electrical Impedance Tomography (EIT) is a non-invasive medical imaging technique which estimates the electrical impedance distribution within some tissue. The study aimed to assess the performance of the EIT system in a thorax imaging by analysis of sensitivity distribution. Sensitivity distribution was visualized using COMSOL Multiphysics simulation in a human thorax represented as an elliptic cylinder phantom consisting of homogeneous and inhomogeneous medium with varying different dimensions of 16 electrode EIT system. Current density distribution was collected for sensitivity analysis using the neighboring method. The sensitivity distribution at each position in the phantom is different. It is caused by the interaction of current density from transmitter and receiver terminal. The different varying parameter of the system can also influence sensitivity distribution. The sensitivity of inhomogeneous phantom is very non-uniformly distributed. The performance of systems was assessed by analysis of the change of sensitivity with the change of electrode dimensions in the homogeneous and inhomogeneous medium.

The Research Progress of Electrical Impedance Tomography for Lung Monitoring

“…Therefore, the most common protective ventilation strategy is to reduce lung injury by setting a reasonable PEEP (positive end-expiratory pressure) value (Guerin, 2011;Brabant et al, 2019). As a noninvasive medical imaging technology, EIT can monitor the air distribution of mechanical ventilation in real time by imaging the cross section of thoracic cavity (Blankman and Gommers, 2012;Andiani et al, 2019). At the same time, EIT can distinguish the area of collapse and transitional expansion (Bikker et al, 2010;Bikker et al, 2011).…”

Electrical Impedance Tomography: Hardware Fundamentals And Medical Applications

“…The investigations of EIT in the field of the respiratory system can be divided into two: Pathology Oriented: These works employ EIT systems previously developed by other researchers or commercial systems and focus on in-vivo applications. In[50]-[56] for example, pulmonary ventilation under anesthesia, mechanical ventilation, embolism and pulmonary edema detection are analyzed and monitored in animals, to evaluate and monitor the pathology under analysis. This is then brought over to human applications.…”