| Summary: | 碩士 === 臺灣大學 === 應用力學研究所 === 98 === With the progress of tumor ablation technique ,a lot of methods could detect temperature, ultrasound images has many advantage with non-invasive, cheap, portable and non-ionizing radiation, ultrasound temperature images have many ways to form image, change in backscattered energy image is the best temperature image among ultrasound temperature image, change in backscattered energy image is decided to establish temperature image in experiments.
When comparing change in backscattered energy theory with other imaging methods, change in backscattered energy temperature image is more fast, directly, converse original signal and have good accuracy between 37 ℃ to 50 ℃, Dr. Arthur develop change in backscattered energy theory about scatter property, this experiment use in- vitro tissue, and try to find the parameters of backscatter which are without considering in change in backscattered energy theory.
In vitro experiments used phantoms and liver tissue to take the temperature experiment, using five kinds of scatter concentrations and three kinds of elasticity, we found concentrations and elasticity that must be considered, then used liver tissue before and after changing to prove the parameters of elasticity would affect the result of change in backscattered energy temperature image.
Finally, the experimental application of change in backscattered energy theory forms image of local temperature distribution, combination of Tereson and burn system heated on pork tissue, and get the ultrasound temperature images, we already develop the image of local temperature distribution
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