Non-invasive measurement of bone mineral density of temporal bone
| Autor: | Cheng Tsung Chen, 陳正宗 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Currently, dual energy X-ray absorptiometry DEXA is the most used instrucment for measuring bone mineral density in clinic. Yet, considering the procedure of measurement that DEXA will produce certain amount of radiation, and also the temporal bone is located at both sides of human skull. The subject becomes more sensitive to the radiation if DEXA is used for measuring the Bone Mineral Density (BMD) of temporal bone. Therefore, this study is to take the advantages of ultrasound without radiation concern for measuring the bone density in the temporal bone by transmission velocity. In this study, the transmission velocity is measured by the non-focused transducer of 2.25MHz, and the BMD is gained and calculated by Micro CT. Later, the correlation between transmission velocity and bone density is mainly discussed. Based on the results, the average transmission velocity in temporal bone is 3317.4 m/s, and the average BMD is 0.804±0.043 g/cm3. It is found that there exists high positive correlation, r=0.79（P |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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