DEVELOPMENT OF A REAL-TIME ADAPTIVE CURRENT TOMOGRAPH

Following the successful development of a multiple-drive electrical im pedance tomography system OXPACT-II featuring a voltage-driven current method for in vitro studies, research work currently being undertaken at the EIT research group in Oxford is aimed at developing a real-tim e multiple-drive adaptive system, called the Oxford Brookes Adaptive C urrent Tomograph Mark-III (OXBACT-III) which will operate at several f requencies in between 10-160 kHz. The objective of this system develop ment is to enable EIT clinical studies to be undertaken based on the a daptive current method. One of the most important issues addressed in the new system design is to achieve high data acquisition speed while maintaining sufficient system accuracy. This paper will describe the o verall data acquisition system structure and relevant system performan ce specifications.