Manuscript received January 3, 2002; revised April 19, 2002.
J. Woloszko is with ArthoCare Corporation, Sunnyvale, CA 94085–3523
USA (e-mail: jwolosk@arthocare.com).
K. R. Stalder is with Stalder Technologies and Research, Redwood City, CA
94063 USA (e-mail: krstalder@staldertechnologies.com).
I. G. Brown is with the Lawrence Berkeley National Laboratory, University
of California, Berkeley, CA 94720 USA (e-mail: igbrown@ibl.gov).
Digital Object Identifier 10.1109/TPS.2002.801612