公开(公告)号：US06695778B2

公开(公告)日：2004-02-24

申请号：US10190079

申请日：2002-07-03

申请人： Polina Golland ,  Stacy Ho

发明人： Polina Golland ,  Stacy Ho

IPC分类号： A61B800

CPC分类号： G01S15/8977 ,  G01S7/5205 ,  G01S7/52074 ,  Y10S128/916

摘要： The present invention provides methods and systems for generating ultrasound images of a plurality of scatterers disposed in a target region. More particularly, a method of the invention derives model response functions for each of a plurality of transducers for a given distribution of scattering media. The interrogation pattern can be selected to include a set of unfocused ultrasound waves generated by one or more of the transducers. The interrogation pattern is transmitted into the target region, and the transducers are utilized to detect echoes generated by the scatterers in the target region in response to the interrogation pattern. The methods and systems of the invention advantageously allow obtaining ultrasound images of a target region without employing beamforming either in transmission of ultrasound waves into the region or in detection of echoes generated by scatterers in the target region in response to the transmitted waves.

摘要翻译： 本发明提供了用于产生设置在目标区域中的多个散射体的超声图像的方法和系统。 更具体地，本发明的方法为散射介质的给定分布导出多个换能器中的每一个的模型响应函数。 可以选择询问模式以包括由一个或多个换能器产生的一组未聚焦的超声波。 询问模式被传送到目标区域，并且换能器用于响应于询问模式来检测由目标区域中的散射体产生的回波。 本发明的方法和系统有利地允许获得目标区域的超声波图像，而不需要在将超声波传输到该区域中或者在检测由响应于发射波的目标区域中的散射体产生的回波时使用波束形成。

公开(公告)号：US5917937A

公开(公告)日：1999-06-29

申请号：US843326

申请日：1997-04-15

申请人： Richard Stephen Szeliski ,  Polina Golland

发明人： Richard Stephen Szeliski ,  Polina Golland

IPC分类号： G06T7/00 ,  H04N13/00 ,  G06K9/00

CPC分类号： G06K9/20 ,  G06T7/0075 ,  H04N13/0014 ,  G06K2209/40 ,  G06T2207/10012 ,  H04N13/0037 ,  H04N13/0242 ,  H04N13/0289 ,  H04N13/0296 ,  H04N13/0422 ,  H04N13/0468 ,  H04N13/0497 ,  H04N2013/0081

摘要： A stereo matching method simultaneously recovers disparities, colors and opacities from input images to reconstruct 3-dimensional surfaces depicted in the input images. The method includes formulating a general disparity space by selecting a projective sampling of a 3D working volume, and then mapping the input images into cells in the general disparity space. After computing statistics on the color samples at each cell, the method computes initial estimates of color and opacity from the statistics (e.g., the mean and variance of the color samples). The method uses opacity to compute visibility and then uses this visibility information to make more accurate estimates by giving samples not visible from a given camera less or no weight. The method uses the initial estimates as input to refining process which tries to match re-projected image layers to the input images.

摘要翻译： 立体匹配方法同时从输入图像中恢复差异，颜色和不透明度，以重建输入图像中描绘的三维表面。 该方法包括通过选择3D工作量的投影采样，然后将输入图像映射到一般视差空间中的单元格来制定一般的差异空间。 在计算每个单元格上的颜色样本的统计数据之后，该方法根据统计信息计算颜色和不透明度的初始估计值（例如，颜色样本的平均值和方差）。 该方法使用透明度来计算可见度，然后使用该可见性信息来通过给予从给定的相机更少或没有重量而不可见的样本来进行更准确的估计。 该方法使用初始估计作为精炼过程的输入，其尝试将重新投影的图像层与输入图像相匹配。