目的评价胫骨定量超声（QUS）和双能X线吸收法（DXA）在骨密度（BMD） 测量和骨质疏松（OP）诊断中的一致性。

Objective To evaluate consistency of bone mineral density(BMD) measurement and osteoporosis(OP) diagnosis between tibial quantitative ultrasonometry(QUS) and dual energy X-ray absorptiometry(DXA).

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超声衍射时差(tofd)法是焊缝超声检测和缺陷定量很有发展前景的新技术。

Ultrasonic time-of-flight diffraction (TOFD) technique is a new successful one for detecting and sizing the discontinuities in welded joints.

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目的比较超声组织定征视频法与射频法在心肌声学造影定量分析中的应用价值。

Objective To compare the value of two ultrasonic tissue characterization (UTC) methods (video frequency method and radio frequency method) in quantitative myocardial contrast echocardiography.

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