超声组织定征的仿体研究:不同浓度淀粉悬液的声学密度定量分析 |
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引用本文: | 朱永胜,钱蕴秋,刘博,田新桥,刘爱玲,刘丽文. 超声组织定征的仿体研究:不同浓度淀粉悬液的声学密度定量分析[J]. 中国超声医学杂志, 1999, 15(11): 9 |
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作者姓名: | 朱永胜 钱蕴秋 刘博 田新桥 刘爱玲 刘丽文 |
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作者单位: | 1. 710032,西安市第四军医大学西京医院超声诊断科 2. 辽宁省朝阳市中心医院彩超室 |
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摘 要: | 目的: 比较视频信号和超声背向散射信号测定对散射体浓度变化的敏感性, 探讨散射体浓度与其声学特性间的关系。方法: 测定 0.1% 到2.0% 不同浓度淀粉悬液的视频强度和背向散射积分。结果: 淀粉悬液的浓度-视频强度和浓度-背向散射积分曲线形态相近, 均由上升支、平台、下降支组成, 背向散射积分上升幅度 (约30dB) 大于视频信号的上升幅度 (约 20dB)。结论: 背向散射积分测定对散射体浓度的敏感性优于视频强度测定, 散射体浓度增大可使后方的信号衰减逐渐增大。
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关 键 词: | 声学密度定量 视频强度 背向散射积分 淀粉悬液 |
A Simulator Study of Tissue Characterization: Acoustic Densitometry in Varied Concentrations of Amylum Suspension |
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Abstract: | Objective:To compare the sensitivity of video intensity and ultrasonic backscatter signal analysis in varied concentration scatter factors and to find the relation between the varied concentration scatter factor and acoustic property.Methods:Varied concentration amylum suspensions from 0 1% to 2% as the simulator were used for analysis of video intensity and backscatter integration.Results:Concentration-video intensity and concentration-backscatter integration of amylum suspension both had a similar form of ascendant slope,a plateau and a descendant slope.But the ascendant amplitude of backscatter curve(about 30dB) is higher than that of video intensity curve(about 20dB).Conclusion:The sensitivity of backscatter integration analysis was higher than video intensity analysis.Increased concentration of scatter will bring about increased attenuation in the back field. |
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Keywords: | Acoustic densitometry Video intensity Backscatter integration Amylum suspension |
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