Non-invasive quantitative reconstruction of tissue elasticity using an iterative forward approach.

Non-invasive quantitative reconstruction of tissue elasticity using an iterative forward approach.
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使用迭代前向方法对组织弹性进行非侵入性定量重建。

DOI:
10.1088/0031-9155/45/6/307
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发表时间:
2000
影响因子:
3.5
通讯作者:
Parker,KJ
Parker,KJ
中科院分区:
工程技术2区
文献类型:
--
作者:
Fu,D;Levinson,SF;Gracewski,SM;Parker,KJ

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提出了一种新的迭代方法来估计杨氏模量在均匀的软组织使用振动声弹性成像。施加低频(低于100 Hz)外部振动,并记录三个或更多连续帧的B扫描图像数据。软组织结构的内部振动运动是根据连续帧对之间的2D位移计算的,这些位移是使用基于网格的散斑跟踪方法估计的。已经开发了一种迭代正向有限元方法,从测量的振动运动重建杨氏模量。这是通过将2D图像域细分为样本块来实现的,其中杨氏模量被假定为恒定的。由于有限元方程是内部一致的,因此不需要位移以外的边界值。的泊松比和阻尼系数(粘度)的结果的敏感性进行了研究。使用模拟的位移数据和使用组织模拟体模的数据,该方法进行了验证。
A novel iterative approach is presented to estimate Young's modulus in homogeneous soft tissues using vibration sonoelastography. A low-frequency (below 100 Hz) external vibration is applied and three or more consecutive frames of B-scan image data are recorded. The internal vibrational motion of the soft tissue structures is calculated from 2D displacements between pairs of consecutive frames, which are estimated using a mesh-based speckle tracking method. An iterative forward finite element approach has been developed to reconstruct Young's modulus from the measured vibrational motion. This is accomplished by subdividing the 2D image domain into sample blocks in which Young's modulus is assumed to be constant. Because the finite element equations are internally consistent, boundary values other than displacement are not required. The sensitivity of the results to Poisson's ratio and the damping coefficient (viscosity) is investigated. The approach is verified using simulated displacement data and using data from tissue-mimicking phantoms.
DOI: 10.1126/science.7569924
发表时间: 1995-09-29
期刊: SCIENCE
影响因子: 56.9
作者:
MUTHUPILLAI, R;LOMAS, DJ;EHMAN, RL
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DOI: 10.1109/42.746627
发表时间: 1998-12
影响因子: 10.6
作者:
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通讯作者: Fai Yeung;S. Levinson;D. Fu;K. Parker
组织旋转下的散斑运动伪影
DOI: --
发表时间: 1994
期刊: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子: --
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影响因子: 2.9
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发表时间: 1998-05-01
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通讯作者: Bucaro, JA