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1. 发明授权

US06181810B2 Method and apparatus for spatial and temporal filtering of intravascular ultrasonic image data 失效
标题翻译：血管内超声图像数据空间和时间过滤的方法和装置
公开(公告)号：US06181810B2
公开(公告)日：2001-01-30
申请号：US09127029
申请日：1998-07-30
申请人： Xiangmin Zhang , Tat-Jin Teo
发明人： Xiangmin Zhang , Tat-Jin Teo
IPC分类号： G06D900
CPC分类号： G06T5/10 , G01S7/52036 , G06T5/002 , G06T2207/20056 , G06T2207/20182
摘要： A method and an apparatus are provided for combining spatial and temporal filtering for blood speckle reduction in high frequency ultrasound images wherein a sequence of image frames is processed to produce a binary mask. In this mask, a first value is assigned to regions of identified blood speckles and a second value is assigned to regions of the remainder. The images are then modulated with the mask, i.e., by applying different filtering techniques to assigned blood regions and assigned nonblood (i.e., tissue) regions, the filtering techniques having been selected to optimize images for the type of feature to be highlighted based on differences in frequency sensitivity between blood and tissue. The images are preferably in polar coordinate format. The degree of blood speckle suppression can be determined based on the actual values of the pixels at the same spatial location in given frames.
摘要翻译：提供一种用于组合高频超声图像中的血斑散射的空间和时间滤波的方法和装置，其中处理一系列图像帧以产生二进制掩模。在该掩模中，将第一值分配给所识别的血斑的区域，并且将第二值分配给剩余部分的区域。然后，利用掩模调制图像，即通过对分配的血液区域和分配的非血液（即组织）区域应用不同的滤波技术，已经选择了滤波技术以根据差异来优化要强调的特征类型的图像在血液和组织之间的频率敏感性。图像优选地是极坐标格式。可以基于给定帧中相同空间位置处的像素的实际值来确定血斑散布度。

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