Quantitative Assessment of Human Bone Tissue by Novel Ultrasound Techniques - Chen, Pei-Jarn
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Three novel ultrasound techniques are proposed to estimate the bone tissue in this dissertation. The dual-transducer technique utilizes two transducers placed on the same side of tibia; one for transmitter and receiver, the other one for receiver only. The acoustic speed of tibia shaft can be estimated from the information of time-of-flight on both transducers and the separation distance between the transducer pair without the knowledge of tibia thickness. Next, a two-sided interrogation technique was used two transducers placed both sides of calcaneus. Those transducers are operated at echo…mehr

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Produktbeschreibung
Three novel ultrasound techniques are proposed to estimate the bone tissue in this dissertation. The dual-transducer technique utilizes two transducers placed on the same side of tibia; one for transmitter and receiver, the other one for receiver only. The acoustic speed of tibia shaft can be estimated from the information of time-of-flight on both transducers and the separation distance between the transducer pair without the knowledge of tibia thickness. Next, a two-sided interrogation technique was used two transducers placed both sides of calcaneus. Those transducers are operated at echo mode and transmission mode, respectively. Then, the acoustic speed of bone tissue on calcaneus can be obtained without the information of bone tissue thickness. In this dissertation, the time domain split spectrum processing (SSP) technique is also proposed to decompose the broadband ultrasound pulse into a serial narrowband pulses with different frequencies. The velocity dispersion magnitude (VDM) can be obtained from the processing of the incident ultrasound pulse and the transmitted pulse with one broadband pulse interrogation. In summary, the proposed three novel ultrasound techniques are fairly simple and straightforward methods. The results reveal that the proposed techniques have potential on clinical applications for osteoporosis assessments.
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Autorenporträt
Pei-jarn Chen received the B.S degree in 1980 and the M.S Degree in 1982 from the Thing Hua University in Taiwan.1982 ~ 1988, he worked in the radiation laboratory of Taipower Company in Taiwan. 1988, he transferred to Southern Taiwan University of Science and Technology as a member of department of Electrical Engineering. In May of 2005, he completed the Ph. D degree at National Cheng Kung University of biomedical engineering in Taiwan. His current research interests are biosignal processing, meditronics, and medical ultrasound.