Electrical Impedance Tomography System for detecting fast physiological signal: KHU Mark2.5

Electrical impedance Tomography (EIT) can produce real-time images of conductivity variations associated with respiratory and cardiac cycles. We report the development of a new multi-frequency EIT system called the KHU Mark2.5. It has new features such as flexible electrode configurations to accommodate application-specific requirements, multiple independent current sources and voltmeters for fully parallel operations, improved data acquisition speeds for faster frame rates due to the pipeline structure and compact mechanical design. Automatic self-calibration is implemented inside a clinical EIT system to improve measurement accuracy and image quality. Developed the EIT system can be cascaded to form a system with a larger number of channels for three-dimensional EIT imaging. We present how we could integrate our EIT system with ECG and respiration monitoring. Integrated system may improve the clinical significance of the patient monitoring.