A MODEL FOR THE PROPAGATION AND SCATTERING OF ULTRASOUND IN TISSUE
A MODEL FOR THE PROPAGATION AND SCATTERING OF ULTRASOUND IN TISSUE
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DOI：
10.1121/1.400497
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发表时间：
1991-01-01
影响因子：
2.4
通讯作者：
JENSEN, JA
中科院分区：
文献类型：
--
作者：
JENSEN, JA
推导了描述超声在非均匀介质中传播和散射的非均匀波动方程。 散射项是密度和传播速度扰动的函数。波方程的积分解与临床超声中使用的典型换能器的场的一般描述相结合，以产生接收到的脉冲回波压力场的模型。在文献中可以找到许多传感器的解析表达式，并且任何传感器激励都可以并入模型中。 一个例子是一个凹的，nonapodized换能器中的预测压力场相比，测量字段。
An inhomogeneous wave equation is derived describing propagation and scattering of ultrasound in an inhomogeneous medium. The scattering term is a function of density and propagation velocity perturbations. The integral solution to the wave equation is combined with a general description of the field from typical transducers used in clinical ultrasound to yield a model for the received pulse-echo pressure field. Analytic expressions are found in the literature for a number of transducers, and any transducer excitation can be incorporated into the model. An example is given for a concave, nonapodized transducer in which the predicted pressure field is compared to a measured field.