A method of reducing grating lobes associated with an ultrasound linear phase array intended for transrectal thermotherapy
A method of reducing grating lobes associated with an ultrasound linear phase array intended for transrectal thermotherapy
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DOI：
10.1109/58.655626
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发表时间：
1997-09-01
影响因子：
3.6
通讯作者：
Cain, CA
中科院分区：
文献类型：
--
作者：
Gavrilov, LR;Hand, JW;Cain, CA
讨论了平面线阵超声相控阵在前列腺疾病经直肠热疗中的应用。研究了驱动阵列的几种方案，测量了水中超声强度的空间分布，并与计算机模拟进行了比较。给出了基于在军队中使用元件子集和去激活几个元件来抑制栅瓣的实用建议，通过采用这些措施可以增加治疗安全性，因为栅瓣和其他次级强度峰中的相对强度和功率被降低，以及引入体内的总超声能量而不显著降低焦点处的最大功率。
Some practical aspects of planar linear ultrasound phased arrays for transrectal thermotherapy of prostate diseases are discussed. Several regimens for driving the array are investigated and spatial distributions of ultrasound intensities are measured in water and compared with computer simulations. Practical recommendations for suppressing grating lobes based on the use of subsets of elements and de-activation of several elements in the army are given, Treatment safety could be increased by adopting these measures since the relative intensities and power in grating lobes and other secondary intensity peaks are decreased, as is the overall ultrasound energy introduced into the body without significant reduction in the maximum power at the focus.