Thermal Mapping, via Liquid Crystals, of the Temperature Field near a Heated Surgical Probe

[+] Author and Article Information
T. E. Cooper, J. P. Groff

Department of Mechanical Engineering, Naval Postgraduate School, Monterey, Calif.

J. Heat Transfer 95(2), 250-256 (May 01, 1973) (7 pages) doi:10.1115/1.3450036 History: Received February 25, 1972; Online August 11, 2010


This paper discusses the use of heat for producing clinical lesions in tissue and presents the design and analysis of a resistively heated surgical probe. The probe surface temperature is accurately maintained and controlled by using a Wheatstone bridge. The probe was embedded in a clear agar–water test medium, and the temperature field generated by the probe was measured with liquid crystals, a material that provides a visual display of certain isotherms. Experimental results compare within approximately 10 percent of a two-dimensional numerical solution. A one-dimensional theoretical model is also developed which examines the influence of blood flow on the temperature field.

Copyright © 1973 by ASME
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