Ultrasound-stimulated vibro-acoustic spectrography
Ultrasound-stimulated vibro-acoustic spectrography
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DOI：
10.1126/science.280.5360.82
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发表时间：
1998-04-03
期刊：
影响因子：
56.9
通讯作者：
Greenleaf, JF
中科院分区：
文献类型：
--
作者：
Fatemi, M;Greenleaf, JF
提出了一种基于辐射力的超声成像方法，用于成像材料对机械激励的声响应，声能量是由固体和组织发射的，响应于干涉聚焦超声波束产生的振荡辐射力。超声激励声发射的频谱表现为目标共振。对物体上的辐射力进行栅格扫描，并记录发出的声音的幅度和相位，得到的数据可以计算出与声音发射物体的弹性成分有关的图像。声发射信号识别音叉共振、亚毫米玻璃球和切除动脉中的钙化，并检测到纳米级的物体运动。
An ultrasound method based on radiation force is presented for imaging the acoustic response of a material to mechanical excitation, Acoustic energy was emitted from solids and tissues in response to an oscillatory radiation force produced by interfering focused beams of ultrasound. Frequency spec tra of ultrasound-stimulated acoustic emission exhibited object resonances. Raster-scanning the radiation force over the object and recording the amplitude and phase of the emitted sound resulted in data from which images related to the elastic compositions of the acoustically emitting objects could be computed. Acoustic emission signals distinguished tuning-fork resonances, submillimeter glass spheres, and calcification in excised arteries and detected object motions on the order of nanometers.