SPECKLE IN ULTRASOUND B-MODE SCANS
SPECKLE IN ULTRASOUND B-MODE SCANS
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DOI：
10.1109/t-su.1978.30978
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发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
BURCKHARDT, CB
中科院分区：
文献类型：
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作者：
BURCKHARDT, CB
通过简单的线性或扇形扫描获得的超声图像显示颗粒状外观，称为“斑点”。“这个斑点被分析了。散斑的减少，可以得到一个复合扫描与最大幅度写入计算。散斑的减少几乎与平均值可以获得的一样大。它取决于测量的独立幅度值的数量。导出了两个振幅值独立的条件，从而给出了可能减少散斑的限制。
Ultrasound images obtained with a simple linear or sector scan show a granular appearance, called "speckle." This speckle is analyzed. The reduction in speckle that can be obtained with a compound scan with maximum amplitude writing is computed. The reduction in speckle is almost as large as can be obtained with averaging. It depends on the number of independent amplitude values that are measured. The condition for the independence of two amplitude values is derived, and thus a limit is given for the possible reduction in speckle.