超音波CTによる生体内温度分布の非侵襲的測定法に関する研究

概要

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It is necessary to measure the temperature distributions in tissues during hyperthermia which is a treatment of cancer. We can obtain the sound speed distribution within the object by measuring the arrival time of sound wave with ultrasonic CT. The purpose of this study is to develop a method measuring indirectly the temperature distribution in tissues from the difference of sound speed after heating and before heating, using the characteristics the sound speed depends on the temperature. We obtained the temperature distribution in phantom made of agar with accuracy of 0.1℃ : But we could not obtain the temperature distribution in tuna with the same accuracy as agar. This is because the difference of sound speed of tuna and water is much more than the difference of agar and water. We can make the glucose solution having a given sound speed by changing the concentration. We made the experiment with excised tuna and the glucose solution having the sound speed close to tuna. As a result, we obtained the temperature distribution in excised tuna with the same accuracy as agar.
八代工業高等専門学校の論文
2005-03-01