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標題Title: Quantitative ultrasound
作者Authors: 陳培展
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: quantitative ultrasound (QUS), Achilles tendon, BUA, SOS,, aging effect
摘要Abstract: Quantitative ultrasound (QUS) techniques have recently been widely
applied for the characterization of tissues. For example, they can be used for
the quantification of Achilles tendon properties based on the broadband
ultrasound attenuation (BUA) and the speed of sound (SOS) when the
ultrasound wave passes through the tissues. This study is to develop an
integrated system to investigate the properties of Achilles tendons using
QUS images from UBIS 5000 (DMS, Montpellier, France) and B-mode
ultrasound images from HDI 5000 (ATL, Ultramark, USA). Subjects
including young (32 females and 17 males; mean age: 23.7 ± 2.0) and
middle-aged groups (8 female and 8 males; mean age: 47.3 ± 8.5 s) were
recruited and tested for this study. Only subjects who did not exercise
regularly and had no record of tendon injury were studied. The results show
that the BUA is significantly higher for the young group (45.2 ± 1.6 dB MHz−1) than the middle-age group (40.5 ± 1.9 dB MHz−1), while
the SOS is significantly lower for the young (1601.9 ± 11.2 ms−1)
compared to the middle-aged (1624.1 ± 8.7 m s−1). On the other hand, the
thicknesses of Achilles tendons for both groups (young: 4.31 ± 0.23 mm;
middle age: 4.24 ± 0.23 mm) are very similar. For one patient who had an
Achilles tendon lengthening (ATL) surgery, the thickness of the Achilles
tendon increased from 4 mm to 4.33 mm after the surgery. In addition, the
BUA increased by about 7.2% while the SOS decreased by about 0.6%. In
conclusion, noninvasive ultrasonic assessment of Achilles tendons is useful
for assisting clinical diagnosis and for the evaluation of a therapeutic
regimen

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