Battery powered and wireless electrical impedance tomography spectroscopy imaging using bluetooth

Abstract

A recently developed Electrical Impedance Tomography Spectroscopy (EITS) system, the UCL Mk2.5, was modified to connect to a PC using a Bluetooth radio replacement for a RS232 cable with power supplied by a 12V DC battery. The battery powered wireless system was more robust to variation in contact impedance when used in multifrequency time difference imaging. Additional advantages are safety by complete isolation and improved freedom of movement for the subject which might confer reduced movement artifact and improved electrode contact.