One modality for destroying malignant tissue involves


One modality for destroying malignant tissue involves imbedding a small spherical heat source of radius ro within the tissue and maintaining local temperatures above a critical value Tfor an extended period. Tissue that is well removed from the source may be assumed to remain at normal body temperature (T= 37°C). Obtain a general expression for the radial temperature distribution in the tissue under steady-state conditions for which heat is dissipated at a rate q. If r= 0.5 mm, what heat rate must be supplied to maintain a tissue tem- perature of  T= 42°C  in  the  domain  0.5 5 mm? The tissue thermal conductivity is approxi- mately 0.5 W/m · K. Assume negligible perfusion.

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Mechanical Engineering: One modality for destroying malignant tissue involves
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