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標題Title: Quantitative assessment of osteoporosis from the tibia shaft by ultrasound techniques
作者Authors: 陳培展,Tainsong Chen ..等
上傳單位Department: 電機工程系
上傳時間Date: 2009-11-18
上傳者Author: 陳培展
審核單位Department: 電機工程系
審核老師Teacher: 陳培展
檔案類型Categories: 論文Thesis
關鍵詞Keyword: Speed of sound; Ultrasound techniques
摘要Abstract: Bone mineral density (BMD) is used as a clinical estimate of the risk of fracture. Ultrasound provides an alternative or complement
to X-ray based methods of bone densitometry for determining BMD. Among ultrasonic characteristics, the speed of sound
(SOS) is a useful tool for assessment of osteoporosis because, as recently reported, it represents a combination of density and
compressibility of bone tissue. Thus, it might provide better information on bone quality to estimate the fracture risk. In this
paper, a dual-transducer ultrasound technique was employed to measure the mean ultrasound propagation speed of the cortical
layer as well as the cancellous layer at the tibia shaft. Encouraging results from 18 outpatients showed a high correlation
(r ¼ 0:93) between measurements of BMD and those from dual energy X-ray absorptiometry (DEXA)

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2009_11_f87f1e7a.pdf 153Kb pdf 354 74
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