| 相控阵超声断层成像诊断仪孔径聚焦声场的研究 |
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| 引用本文： | 柴新禹 程敬之. 相控阵超声断层成像诊断仪孔径聚焦声场的研究[J]. 中国超声医学杂志, 1993, 9(4): 260-264 |
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| 作者姓名： | 柴新禹 程敬之 |
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| 作者单位： | 郑州大学(柴新禹)，西安交通大学(程敬之) |
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| 摘 要： | 孔径聚焦技术是B型超声诊断仪中一种提高近场区域横向分辨力的有效手段。本文根据相控阵换能器的远场指向性理论和近场声压分布理论,对孔径聚焦声场进行了分析和数值计算,在此基础上给出了相控阵超声断层成像诊断仪中相控阵换能器(64阵元)在孔径聚焦过程中孔径的变化范围及孔径聚焦所适应的区域深度。
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| 关 键 词： | 超声显像 超声波诊断机 聚焦声场 |
Study of Aperture Focusing Acoustic Field in Phased Array Ultrasonic Diagnostic B-scanner |
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| Chai Xinyu Cheng JingzhiZhengzhou University Xian Jiao Tong University. Study of Aperture Focusing Acoustic Field in Phased Array Ultrasonic Diagnostic B-scanner[J]. Chinese Journal of Ultrasound in Medicine, 1993, 9(4): 260-264 |
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| Authors: | Chai Xinyu Cheng JingzhiZhengzhou University Xian Jiao Tong University |
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| Affiliation: | Chai Xinyu Cheng JingzhiZhengzhou University Xian Jiao Tong University |
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| Abstract: | The aperture focusing technology is an effective means of the improving near field lateral resolution in ultrasonic diagnostic B-sanner. In this paper, according to the far field direction theory and near field acoustic pressure distribution theory of the phased array transduer, the authors analyesd and calculated the acoustic field. On this basis, the change range of aperture and its applicable depth to the transducer(64 units) of the phased array ultrasonic diagnostic B-sanner in aperture focusing were presented. |
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| Keywords: | Ultrasonic imaging Medical ultrasonic |
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