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URN etd-0913107-215435 Statistics This thesis had been viewed 1888 times. Download 7 times. Author Yang Chang Author's Email Address No Public. Department Mechanical Engineering Year 2006 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 79 Title INTENSITY AND TEMPERATURE FIELD EXPLORATION OF FOCUSED ULTRASOUND THERMAL THERAPY Keyword thermal dose. high intensified focused ultrasound focused ultrasound surgery Bio-heat transfer thermal therapy thermal therapy Bio-heat transfer focused ultrasound surgery high intensified focused ultrasound thermal dose. Abstract The distribution of the intensity field of ultrasound is complicated and not fully explored. Focused ultrasound surgery demands the understanding how all the variables influence the heating region near the ultrasound focal point. The high temperature generated from the treated area should be prevented from damaging the normal tissue which is one of the most significant studies of this subject.
With the high-frequency ultrasound focusing transducer, this study combines the theories and the simulation to explore the intensity distribution and features due to the generated wave field. Furthermore, the functions of the spherical transducers are investigated. Through the bio-heat transfer equation, finally, the temperature distribution formed by the ultrasound wave field in the tissue is validated by the experiments. Then, this study can be used as the reference for the future design of the transducer and the therapy procedures.
Advisor Committee Hong-Sen Kou - advisor
Ji-Jen, Lee - advisor
Cheng-Fang Chen - co-chair
Hsien-Chun Lin - co-chair
Files Date of Defense 2007-07-31 Date of Submission 2007-09-17