On modeling biomedical ultrasound RF echoes using a power-law shot-noise model.
On modeling biomedical ultrasound RF echoes using a power-law shot-noise model.
复制标题
使用幂律散粒噪声模型对生物医学超声射频回波进行建模。
DOI：
10.1109/58.935712
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Piccoli,CW
中科院分区：
文献类型：
--
作者：
Kutay,MA;Petropulu,AP;Piccoli,CW
我们提出了一个新的模型，即功率律散粒噪声过程的RF超声回波。基于这个模型，在本文中定义的意义上，回波的同相和正交分量显示出1/f/sup /spl beta//-型谱行为。包络也表现出这种类型的频谱行为，但具有不同的指数。这一结果解释了其他研究人员对RF回波频谱的幂律趋势的实验观察。尽管散粒噪声模型在过去已经被用于对RF回波进行建模，但这是第一次使用幂律脉冲响应滤波器，并且已经研究了RF回波的所得1/f/sup /spl beta//-型谱行为。模型参数与组织特性（如散射体密度和衰减）相关;因此，它们有可能用作组织定征特征。基于100幅乳腺临床超声图像的数据库测试了所提出模型的有效性。
We propose a new model for the RF ultrasound echo, namely the power-law shot-noise process. Based on this model, the in-phase and quadrature components of the echo are shown to exhibit 1/f/sup /spl beta//-type spectral behavior, in a sense that is defined in the paper. The envelope also exhibits this type of spectral behavior, but with a different exponent. This result explains the experimental observations by other researchers of the power-law trend of the RF echo spectrum. Although the shot-noise model has been used in the past for modeling the RF echo, this is the first time that a power-law impulse response filter is used and that the resulting 1/f/sup /spl beta//-type spectral behavior of the RF echo has been investigated. The model parameters are linked to tissue characteristics, such as scatterer density and attenuation; thus, they have the potential to be used as tissue characterization features. The validity of the proposed model is tested based on a database of 100 clinical ultrasound images of the breast.
影响因子：
25.7
作者：
Dasarathy S;Dasarathy J;Khiyami A;Joseph R;Lopez R;McCullough AJ
通讯作者：
McCullough AJ