Noise And Spatial Resolution In Images From A Real-time Electrical Impedance Tomograph

We present quantitative measurements of noise and spatial resolution of the Sheffield Real-Time Electrical Impedance Tomograph, using a saline-filled cylindrical tank with a thin glass rod as a test object. The results allow the performance of the hardware to be compared with that of other EIT systems. Measurements from images formed using a recent formulation of the reconstruction weights matrix are compared with those from the previous formulation, and the trade-off between spatial resolution and image noise is assessed.

[1]  Brian H. Brown,et al.  Limitations to SV determination from APT images , 1989, Images of the Twenty-First Century. Proceedings of the Annual International Engineering in Medicine and Biology Society,.

[2]  B.H. Brown,et al.  Real Time Electrical Impedance Imaging , 1990, [1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[3]  D C Barber,et al.  Fast reconstruction of resistance images. , 1987, Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics.

[4]  B. Brown,et al.  Blood Flow Imaging Using Electrical Impedance Tomography , 1991, Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991.

[5]  B H Brown,et al.  The Sheffield data collection system. , 1987, Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics.

[6]  Brian H. Brown,et al.  Digital demodulator for electrical impedance imaging , 1989, Images of the Twenty-First Century. Proceedings of the Annual International Engineering in Medicine and Biology Society,.

[7]  B. Brown,et al.  Recent Developments in Applied Potential Tomography-APT , 1986 .