Proceedings of the 20th annual international conference of the IEEE engineering in medicine and biology society; Hong Kong Sar, China, october 29-november 1, 1998 : BIOMEDICAL ENGINEERING TOWARDS THE YEAR 2000 AND BEYOND: INSTRUMENTATION AND SENSORS, BRAIN AND NEURAL ENGINEERING. PART 4/6, VOL. 20. - Chang, H.K; Zhang, Y.T (The Institute of Electrical and Electronics Engineers, Inc, 1998)