Simulated measurement of heat field distribution in microwave solidification treatment of liver tumor

Abstract

The method for simulating the heat field distribution of the microwave coagulation treatment of liver tumors in the invention is a simulation measurement method of the heat field distribution during the microwave coagulation treatment of liver tumors. Including 1), the pre-experiment on the isolated pig liver, it is found that the single embedded microwave wireless is symmetrically distributed in the r direction and the θ direction: 2) making a two-dimensional simulation measurement device for the microwave radiation field, 3) placing the microwave antenna Put it into the two-dimensional analog measurement device, and set the measurement thermocouple at the corresponding position. The thermocouple is connected to the data collector, and the latter is connected to the computer. 4), the tissue microwave phantom is blanked in the two-dimensional analog measurement device, ), measuring the temperature change with time at the position where the thermocouple is set for microwave radiation of different energies, and substituting the data into the biological heat transfer equation to obtain the microwave radiation energy SAR per unit volume and unit time, and substituting the SAR into its distribution function equation , by solving this simultaneous equation with a computer, the coefficients of the distribution function equation can be obtained, and the distribution function of the three-dimensional thermal field of microwave radiation can be obtained, so that the temperature at a specified point at a specified time can be obtained.

Description

Technical field: [0001] The invention relates to a method for measuring microwave radiation heat field, in particular to a method for simulating heat field distribution in the process of microwave coagulation treatment for liver tumors. Background technique: [0002] Implantable microwave hyperthermia has been widely used in the interventional treatment of liver tumors. The effective temperature and heat field formed by microwaves in cancerous tissues is the key to affect the therapeutic effect, that is, the treatment process is judged by the regulation of the temperature field formed by microwaves. At present, the effective temperature thermal field is used in the treatment process by point temperature measurement method, using 1 or 2 points to estimate and control the effective thermal field body of microwave action, or to infer the change of temperature through the change of resistance. These measurements and The judging method cannot obtain accurate and detailed data of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the temperature of the microwave three-dimensional thermal field cannot be measured and known during the process of implantable microwave therapy for liver tumors, and to provide a simulation measurement that can accurately obtain the dynamic distribution of the microwave three-dimensional thermal field during microwave therapy method, which solves the problem of effective thermal field preset before liver tumor treatment and real-time monitoring during treatment

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