One of the current methods of treating malignant tissues is by localized freezing in situ. Large blood vessels traversing or situated proximal to the treated region, present a "thermal perturbation" to the developing temperature field. This may prevent certain areas of the tumor from being frozen. Alternatively, there is also the problem relating to the freezing of the blood vessel wall and the blood flowing in it. In this study we have simulated the effects of a large blood vessel on the temperature field around a surface cryoprobe by means of a 4.80D/3.4ID mm rigid polyetiiylene-acrilate tube. The tube was embedded in an aqueous solution of 20% mashed potatoes. A 13 mm circular cryoprobe was applied on the free surface of the aqueous solution. The remaining surface area around me cryoprobe and its shaft were enclosed by a plexiglass flange and an air gap.
展开▼
