A frequency domain model for generating B-mode images with array transducers

被引:76
作者
Li, YD [1 ]
Zagzebski, JA [1 ]
机构
[1] Univ Wisconsin, Dept Med Phys, Madison, WI 53706 USA
基金
美国国家卫生研究院;
关键词
D O I
10.1109/58.764855
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
A frequency domain B-mode imaging model applicable to linear and phased array transducers was developed for simulating ultrasound images of random media. Computations are based on an approximation that is less restrictive than the Fresnel approximation. The model is compared with the exact time domain impulse response method, regarded as the "gold standard". In a typical application, errors in simulated rf waveforms are less than 1% regardless of the steering angle for distances greater than 2 cm, yet computation times are on the order of 1/150 of those using the exact method. This model takes into account the effects of frequency-dependent attenuation, backscattering, and dispersion. Modern beam-forming techniques such as apodization, dynamic aperture, elevational focusing, multiple transmit focusing, and dynamic receiving focusing also can be simulated.
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页码:690 / 699
页数:10
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