IEEE-Event

Abstract

Electrical Impedance Tomography (EIT) uses a set of electrodes placed around the patient's body to apply current simulation and measure the resulting potentials, from which an image of the internal conductivity distribution is calculated. EIT was invented 100 years ago by the brother's Schlumberger to prospect for conductive minerals. Since EIT is sensitive to physiological phenomena which affect the conductivity, it has been used to image the brain (to view perfusion changes due to epilepsy and stroke), the breast (to screen for cancerous regions), the abdomen (for gastric emptying) and thorax (to image the movement of blood and gas in the heart and lungs).  

Patients in respiratory failure require positive pressure ventilation to ensure adequate gas exchange.  While ventilation is life-saving, it imposes significant risks. To address these risks, lung EIT has the potential to be a monitoring tool to help guide and optimize lung protective ventilation individually for each patient.  

EIT image reconstruction is difficult because of the way current propagates through all paths in the body; EIT image reconstruction is non-linear, spatially variant, and mathematically ill-conditioned. To solve these problems, regularized image reconstruction techniques are used, which use prior models to penalise low probability solutions. Recently, the increase in computer power has facilitated much more powerful algorithms.

This talk will review recent work in  EIT image reconstruction, and its application for lung imaging.

Biography

Andy Adler is professor and Canada Research Chair (Tier II) in biomedical engineering in Systems and Computer Engineering at Carleton University in Ottawa, Canada. His research interests are in: 1) biometrics imaging and security systems, and the associated algorithms, measurement devices, and privacy and security aspects; and, 2) development of non-invasive biomedical measurement technologies and sensors, including the medical image and signal processing algorithms.

Schedule

• Talk (45 minutes)
• Questions and discussion (15 minutes)
• Apéro and networking opportunities (30 minutes)

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