Ultrasonic measurements of breast viscoelasticity
Ultrasonic measurements of breast viscoelasticity
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DOI：
10.1118/1.2805258
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发表时间：
2007-12-01
期刊：
影响因子：
3.8
通讯作者：
Insana, Michael F.
中科院分区：
文献类型：
--
作者：
Sridhar, Mallika;Insana, Michael F.
描述了乳腺组织粘弹性的体内测量。以 5 fps 记录志愿者的超声波回波帧，同时在 1 秒的斜坡时间内施加单轴压缩力 (1-20 N)，并保持力恒定长达 200 秒。根据回波数据形成时间序列的应变图像，计算空间平均粘性蠕变曲线，并通过将蠕变曲线拟合到二阶 Voigt 模型来估计粘弹性应变参数。该准静态斜坡刺激的有用应变带宽为 10(-2)
In vivo measurements of the viscoelastic properties of breast tissue are described. Ultrasonic echo frames were recorded from volunteers at 5 fps while applying a uniaxial compressive force (1-20 N) within a 1 s ramp time and holding the force constant for up to 200 s. A time series of strain images was formed from the echo data, spatially averaged viscous creep curves were computed, and viscoelastic strain parameters were estimated by fitting creep curves to a second-order Voigt model. The useful strain bandwidth from this quasi-static ramp stimulus was 10(-2)